Spin-state optically readable light quantum information processing material and preparation method and application thereof

Abstract

The invention discloses a spin-state optically readable light quantum information processing material and a preparation method and application thereof. The light quantum information processing material comprises host molecules, an annihilation agent and a dispersion medium, the host molecule is an amino-anthraquinone derivative and is selected from a structure shown in the specification; the triplet energy of the annihilation agent is less than or equal to the triplet energy of the host molecule, and the maximum luminescence peak wavelength of the annihilation agent is not overlapped with the luminescence peak of the host molecule; the dispersion medium is selected from a chromatographically pure solvent or polymer; according to different dispersion media, the light quantum information processing material is in a liquid state and a solid state.

Description

Technical Field

[0001] This invention relates to the fields of optoelectronic materials and quantum information processing technology. More specifically, it relates to a spin-state optically readable quantum information processing material, its preparation method, and its applications. Background Technology

[0002] All-organic molecular systems, with their atomically precise designability, excellent solution / thin-film processability, and avoidance of metal ion quenching effects, have become highly promising carrier platforms in the field of quantum information science. These materials exhibit significant advantages in realizing applications such as quantum computing, quantum communication, and quantum storage: First, molecular systems possess atomically precise designability, allowing for precise control of key parameters such as spin-state lifetime and transition dipole moment through chemical modification; second, organic materials exhibit good solution processability and compatibility with flexible substrates, providing possibilities for constructing high-density integrated quantum devices; and third, all-organic systems avoid the quenching effect of metal ions on quantum states, significantly improving spin coherence time. In recent years, international research teams have made groundbreaking progress in designing molecular systems that meet the DiVincenzo qubit standard. For example, a research group at the University of Cambridge constructed a single-molecule magnet with a long spin lifetime (>100 μs) using porphyrin derivatives, realizing spin-based quantum state initialization and manipulation. The azurite molecular system developed by Caltech successfully observed nuclear spin-assisted quantum coherence at room temperature, providing new ideas for solid-state quantum computing.

[0003] However, three core challenges remain in bringing such molecular systems to practical application. First, quantum information processing requires active spin states (such as singlet S1 and triplet T1) to possess significant luminescence properties for optical initialization and readout. However, in traditional molecular systems, spin-forbidden transitions (S0→T1) result in extremely low luminescence efficiency in triplet states, severely limiting their feasibility as qubits. Second, the system needs to produce a reversible response to external stimuli (such as light, electric, and magnetic fields) and dynamically adjust the spin population distribution. Current mainstream control methods rely on photoisomerization or redox reactions, which suffer from slow response speeds (>ms) and poor cycling stability (<10). 3 The limitations of high-performance systems, such as poor reversibility and other issues, make it difficult to meet the demands of quantum information processing for high-speed, high-fidelity manipulation. Furthermore, some high-performance systems rely on metal complexes or low-temperature environments, restricting their practical application potential.

[0004] Current research indicates that developing all-organic molecular systems possessing spin-state optical readability, rapid response, long spin coherence time, and room-temperature stability has become crucial for overcoming the bottlenecks in quantum information processing technology. To address these two issues, recent research has attempted to convert dark triplet states into luminous singlet states using triplet-triplet annihilation upconversion (TTA-UC) technology. This is followed by introducing intersystem crossing (ISC) and intramolecular charge transfer (ICT) competition into the system, resulting in additional spin states (charge-separated states, CT states). However, efficiently coordinating these processes within a single system to achieve controllable generation, distribution regulation, and independent optical detection of multiple spin states remains a significant challenge. Summary of the Invention

[0005] Based on the above-mentioned shortcomings, the first objective of this invention is to provide a spin-state optically readable quantum information processing material. This material contains no metal elements, can operate at room temperature, and achieves efficient competition and synergy between the ICT and ISC processes through molecular design. Furthermore, it utilizes TTA-UC technology to convert the non-radiative triplet state into an optically readable luminescent singlet state, ultimately realizing optical readability and dynamic controllability of multiple spin states.

[0006] The second objective of this invention is to provide a method for preparing the spin-state optically readable quantum information processing material as described above.

[0007] The third objective of this invention is to provide an application of the spin-state optically readable quantum information processing material described above in the preparation of anti-counterfeiting materials and fluorescent imaging materials.

[0008] The fourth objective of this invention is to provide a method for controllably adjusting the state transition of qubits based on optical quantum information processing materials.

[0009] The fifth objective of this invention is to provide a method for anti-counterfeiting based on photonic quantum information processing materials.

[0010] The sixth objective of this invention is to provide a method for fluorescence imaging based on optical quantum information processing materials.

[0011] To achieve the first objective mentioned above, the present invention adopts the following technical solution:

[0012] This invention discloses a spin-state optically readable quantum information processing material, comprising a host molecule, an annihilation agent, and a dispersion medium;

[0013] The host molecule is an aminoanthraquinone derivative, selected from the structures shown below:

[0014]

[0015] The triplet energy of the annihilator is less than or equal to the triplet energy of the host molecule, and the maximum emission peak wavelength of the annihilator does not overlap with the emission peak of the host molecule;

[0016] The dispersion medium is selected from chromatographically pure solvents or polymers;

[0017] Depending on the dispersion medium, the photonic quantum information processing material exists in both liquid and solid states.

[0018] The aminoanthraquinone derivatives provided by this invention share the following characteristics: on the one hand, the anthraquinone structure enables a favorable ISC process, yielding a large number of triplet states; on the other hand, the amino groups promote the ICT process. Taking 1,5-diaminoanthraquinone (1,5-DAAQ) as an example, the diamino substitution structure weakens the excited-state dipole moment, balancing the rates of the ICT and ISC processes, and can generate a locally excited singlet state after photoexcitation. 1 LE), charge transfer singlet state ( 1 CT) and locally excited triplet state ( 3 LE). Furthermore, the above-mentioned aminoanthraquinone derivatives... 1 LE and 1 CTs all exhibit significant emission, but due to spin forbidden conditions... 3 Since LE does not emit significant light at room temperature, the present invention employs the TTA-UC method to... 3 LE is converted into a singlet state of an annihilator that emits light. At this point, all the major spin states in the system emit light.

[0019] Furthermore, the annihilating agent is selected from the following structures:

[0020]

[0021] The above-mentioned annihilators can accept the triplet state energy of aminoanthraquinone derivatives and undergo TTA-UC luminescence. Furthermore, because the maximum emission peak wavelength of the annihilator does not overlap with the emission peak of the host molecule, they also exhibit good TTA efficiency. Taking 9,10-diphenylanthracene (DPA) and 1,5-DAAQ as examples, DPA accepts the triplet state energy of 1,5-DAAQ... 3 After LE energy, a luminescent singlet state (S1) is generated via TTA-UC. The maximum emission peak wavelength of DPA is 420 nm, which does not overlap with the emission peak of 1,5-DAAQ.

[0022] Furthermore, the mass ratio of the host molecule to the annihilation agent is 1:50 to 1:2000.

[0023] Dispersion media not only disperse host molecules and annihilation agents, but also directly regulate the competitive intensity of ICT and ISC processes within the host molecules through the microenvironmental potential formed by their polarity. Studies have found that changes in solvent polarity can continuously regulate the ICT / ISC ratio, thereby affecting the material. 1 CT state and 3 Yield distribution of the LE state.

[0024] Furthermore, the total mass ratio of the main molecules and the annihilating agent to the dispersion medium is 1:10. 2 -1:10 3 .

[0025] Furthermore, the medium of the liquid system needs to possess solubility, optical transparency, and inertness. The solvent selected in this invention is one or more of toluene (non-polar, f(ε,n) is ~0.014), tetrahydrofuran (moderately polar, f(ε,n) is ~0.21), and methanol (polar, f(ε,n) is ~0.31).

[0026] The dispersion medium of the solid system is a polymer, selected from one or more of polymethyl acrylate (PMA), polymethyl methacrylate (PMMA), polystyrene (PS), polyvinyl alcohol (PVA), and polyethylene glycol (PEG). The polarity and free volume of the polymer chain affect intramolecular motion and energy transfer, while the polymer molecular weight has little effect on the system.

[0027] To achieve the second objective mentioned above, the present invention adopts the following technical solution:

[0028] This invention discloses a method for preparing the spin-state optically readable quantum information processing material as described above. The preparation method is divided into liquid-state quantum information processing material preparation and solid-state quantum information processing material preparation:

[0029] The dispersion medium is selected from chromatographically pure solvents and is used to prepare liquid quantum information processing materials, including the following steps:

[0030] The main molecule and annihilation agent are mixed in proportion, added to a chromatographically pure solvent, mixed well, and oxygen is removed to obtain a liquid photonic quantum information processing material.

[0031] The dispersion medium is selected from polymers and is used to prepare solid-state optical quantum information processing materials, including the following steps:

[0032] The main molecule and annihilation agent are mixed in proportion, added to a polymer-containing solution, mixed evenly, coated onto a substrate, and dried in a light-proof, oxygen-free environment to obtain a solid-state photonic quantum information processing material.

[0033] Furthermore, the polymer concentration in the polymer-containing solution is 2-20 wt%.

[0034] To achieve the third objective mentioned above, the present invention adopts the following technical solution:

[0035] This invention discloses the application of a spin-state optically readable quantum information processing material prepared as described above in the preparation of anti-counterfeiting materials and fluorescent imaging materials.

[0036] To achieve the fourth objective mentioned above, the present invention adopts the following technical solution:

[0037] This invention discloses a method for controllably adjusting the state transition of qubits based on optical quantum information processing materials, comprising the following steps:

[0038] Prepare a series of chromatographically pure solvents of different polarities and sort them according to their polarity.

[0039] The main molecule and annihilation agent are mixed with the above solvent in a fixed ratio. After mixing, oxygen is removed to obtain a series of liquid quantum information processing materials.

[0040] By testing the luminescence information of the aforementioned series of liquid quantum information processing materials, the proportional changes in solvent polarity and the host molecule's ICT and ISC processes were determined, as well as the relationship between solvent polarity and the host molecule's luminescence information. 1 CT state and 3 The proportional variation law of LE state;

[0041] The states of the qubits are switched based on the obtained change patterns.

[0042] The above describes how changes in environmental polarity (determined by the dispersion medium) can be used to finely regulate the competitive processes within the host molecules, thereby enabling the control of qubit states. Research has found that as environmental polarity increases, the ICT process is significantly enhanced, resulting in a more stable state. 1 The CT state simultaneously inhibits the ISC process towards the anthraquinone skeleton. 3 The transition to the LE state leads to 3 The decrease in the LE state population, coupled with gradually increasing solvent polarity, leads to an increase in the ICT / ISC ratio of the host molecule, and consequently, a decrease in the host molecule's... 1 CT state and 3 As the proportion of LE states increases, conversely, as the polarity of the solvent is gradually reduced, the ICT / ISC ratio of the host molecule decreases, and the host molecule's... 1 CT state and 3 The proportion of LE states decreases. This mechanism has been confirmed by global fitting analysis of transient absorption spectra (time resolution ~250 fs) in different polar solvents (such as nonpolar toluene, moderately polar tetrahydrofuran, and strongly polar methanol), and the fitting results clearly resolve the... 1 LE 1CT scan 3 The dynamic behavior and population variation trends of the three LE states. Quantitative data show that, for example, in toluene, the host molecule... 3 The quantum yield of LE can reach ~60%, while it drops to ~20% in methanol. 1 Enhanced fluorescence in the CT state. Therefore, by selecting solvents or polymers of different polarities, or adjusting the mixing ratio, it is possible to continuously and reversibly control the fluorescence. 1 CT and 3 The relative population ratio of LE states enables the transformation of qubit states.

[0043] To achieve the fifth objective mentioned above, the present invention adopts the following technical solution:

[0044] This invention discloses a method for anti-counterfeiting based on photonic quantum information processing materials, comprising the following steps:

[0045] Determine the excitation power threshold of materials for optical quantum information processing;

[0046] Irradiating solid-state photonic quantum information processing materials with lasers below the excitation power threshold causes the host molecules to... 1 CT state emission is dominant, and the emission color is determined to vary from red to orange, corresponding to a CIE coordinate range of (0.62-0.45, 0.37-0.35). When the solid-state photonic quantum information processing material is irradiated with a laser above the excitation power threshold, the singlet state emission of the annihilation agent participates extensively, and the emission color is determined to vary from orange to pinkish-white, corresponding to a CIE coordinate range of (0.45-0.34, 0.35-0.23). The regulation law of excitation power on emission color is obtained.

[0047] By using patterned templates, photonic quantum information processing materials are constructed into anti-counterfeiting patterns. The anti-counterfeiting patterns are then irradiated with lasers of different excitation power thresholds to achieve color changes.

[0048] The above method is based on the nonlinear threshold effect of the TTA-UC process. Studies have found that when the excitation power density is below the excitation power threshold, the upconversion luminescence (UC-PL) intensity is proportional to the square of the power density (dominated by the two-photon process); however, when the excitation power density exceeds this threshold, the UC-PL intensity exhibits a linear relationship with the power density (dominated by the saturated pseudo-first-order process). For example, with 1,5-DAAQ as the host molecule, DPA as the annihilator, and THF as the dispersion medium, this dependence directly leads to dynamic changes in the emission color: assuming an excitation power threshold I ≈ 2.3 W·cm⁻¹. -2 Using low power density (e.g., 0.055 W·cm⁻¹) -2 During excitation, the host molecule's 1CT-mode emission (orange-red, ~585nm) is dominant, while at high power densities (e.g., 5.0W·cm⁻¹), emission decreases. -2 During excitation, the efficient TTA-UC process significantly enhances the singlet emission (blue, ~430 nm) of the annihilator, resulting in a pinkish-white mixed light. This allows for reversible switching of the emission color by adjusting the excitation power, given a fixed material composition, and enables control over the emission originating from... 3 The intensity of the optical signal in the LE state is controlled. Based on this, if a patterned template is used to construct an anti-counterfeiting pattern from the photonic quantum information processing material, and then the anti-counterfeiting pattern is irradiated with lasers of different excitation power thresholds, the anti-counterfeiting pattern will not appear when irradiated below the excitation power threshold of the photonic quantum information processing material because its color is similar to the background. Conversely, the anti-counterfeiting pattern will appear when irradiated above the excitation power threshold because its color differs from the background. Technicians can adjust the excitation power density according to application needs to make the anti-counterfeiting pattern appear and disappear, thereby achieving anti-counterfeiting.

[0049] To achieve the sixth objective mentioned above, the present invention adopts the following technical solution:

[0050] This invention discloses a method for fluorescence imaging based on optical quantum information processing materials, comprising the following steps:

[0051] Confocal imaging of liquid quantum information processing materials was performed using a CCD camera equipped with a time-gated module. Fluorescence signals from short-lived channels (0-1 μs) and long-lived channels (10-50 μs) were collected, enabling multi-channel information readout based on lifetime differences. The short-lived channels clearly displayed the host molecules. 1 The CT state distribution (λ = 590 nm) was detected, while the long-lived channel only detected the S1 state emission of the annihilator (λ = 430 nm), and there was no crosstalk between the two signals.

[0052] Furthermore, the gate width of the time gating module is 1-100μs.

[0053] The beneficial effects of this invention are as follows:

[0054] Through molecular design and multi-mechanism synergy, the first photonic quantum information processing material with room temperature stability, high-efficiency optical readout capability, and multi-parameter dynamic control has been successfully developed. Specifically, it innovatively utilizes triplet-triplet annihilation upconversion (TTA-UC) technology to efficiently convert the traditional "dark" anthraquinone triplet state into a bright singlet state emitting blue light, solving the triplet detection problem in spin-state optical readout. Simultaneously, by precisely balancing the competition between intramolecular charge transfer and intersystem crossing, combined with the external excitation power threshold effect (triggering orange-red light), it achieves this. (Pink and white light color switching), solvent polarity gradient (achieved)3 The three dimensions of control—LE state yield (continuously adjustable from 20-60%), magnetic field response (manipulating the spin distribution of triplet pairs)—enable control over... 1 CT and 3 Real-time, reversible dynamic control of LE-state population; furthermore, this material relies on wavelength resolution (430nm / 590nm dual-color emission) and lifetime resolution (42μs long-lifetime UC emission / 0.5ns short-lifetime CT emission, with a difference of up to 10). 5 With optical signal characteristics that are (times) greater than those of other materials, it simultaneously supports multi-level quantum state encoding, lifetime imaging that resists background interference, and multi-level anti-counterfeiting applications based on dynamic response. The all-organic system design combines excellent environmental stability with solution / thin film processing compatibility, effectively avoiding the quenching risk and low-temperature dependence of metal-based materials, and providing a breakthrough material solution for large-scale photonic information technology. Attached Figure Description

[0055] Figure 1 The diagram shows a schematic (a) of the main molecule and annihilator structure and a basic principle diagram (b) of Example 1;

[0056] Figure 2 The emission spectra of the host molecules in Example 5 are shown as a function of solvent polarity.

[0057] Figure 3 The trends of ISC and ICT intensities of the main molecules in toluene, tetrahydrofuran, and methanol are shown in Example 5.

[0058] Figure 4 A schematic diagram of the present invention is shown for use in a photonic information processing system. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this article can be purchased from the market or prepared by existing methods.

[0061] Example 1

[0062] This example provides a method for preparing a liquid photonic information processing material, the specific steps of which are as follows:

[0063] Weigh the host molecule 1,5-DAAQ and the annihilator molecule DPA at a mass ratio of 1:100. Add the host molecule and the annihilator molecule to chromatographically pure toluene (total molecular mass to solvent mass ratio of 1:500). Sonicate (50-100W power, 2-5 min) or magnetically stir (300-2000 rpm, 2-5 min) to ensure complete dissolution and homogeneous mixing. After thorough dissolution, transfer to a quartz cuvette and use a freeze-thaw cycle deoxygenation method (≥2 cycles) or a high-purity argon bubbling method (bubbling time ≥15 min) to completely remove dissolved oxygen, thus protecting the triplet state generated by photoexcitation, thereby obtaining the liquid photonic information processing material.

[0064] Figure 1 In diagram 'a', the main molecule and the annihilator are structural diagrams. Figure 1 Figure b shows the basic principle diagram of the system, as follows:

[0065] The aminoanthraquinone derivative 1,5-DAAQ is readily generated through the ICT process under the influence of the electron donor amino group. 1 The CT state, while the anthraquinone skeleton retains the tendency to form during the ISC process. 3 LE state. Furthermore, 3 The LE state, acting as a donor and paired with the annihilator DPA acceptor, enabled the system to achieve efficient upconversion from a non-emission triplet state to a radiation singlet state, thus constructing a dual-emission, field-sensitive spin-photon interface.

[0066] Example 2

[0067] This example provides a method for preparing a liquid photonic information processing material, the specific steps of which are as follows:

[0068] Weigh the host molecule 1,5-DAAQ and the annihilator molecule DPA at a mass ratio of 1:100. Add the host molecule and annihilator molecule to chromatographically pure tetrahydrofuran (total mass ratio of host molecule and annihilator molecule to solvent is 1:500). Sonicate (50-100W, 2-5 min) or magnetically stir (300-2000 rpm, 2-5 min) to ensure complete dissolution and homogeneous mixing. After thorough dissolution, transfer to a quartz cuvette and use a freeze-thaw cycle deoxygenation method (≥2 cycles) or a high-purity argon bubbling method (bubbling time ≥15 min) to completely remove dissolved oxygen, thus protecting the triplet state generated by photoexcitation, thereby obtaining the liquid photonic information processing material.

[0069] Example 3

[0070] This example provides a method for preparing a liquid photonic information processing material, the specific steps of which are as follows:

[0071] Weigh the host molecule 1,5-DAAQ and the annihilator molecule DPA at a mass ratio of 1:100. Add the host molecule and annihilator molecule to chromatographically pure methanol (total mass ratio of host molecule and annihilator molecule to solvent is 1:500). Sonicate (50-100W, 2-5 min) or magnetically stir (300-2000 rpm, 2-5 min) to ensure complete dissolution and homogeneous mixing. After thorough dissolution, transfer to a quartz cuvette and use a freeze-thaw cycle deoxygenation method (≥2 cycles) or a high-purity argon bubbling method (bubbling time ≥15 min) to completely remove dissolved oxygen, thus protecting the triplet state generated by photoexcitation, thereby obtaining the liquid photonic information processing material.

[0072] Example 4

[0073] This example provides a method for preparing a solid-state photonic information processing material, the specific steps of which are as follows:

[0074] Select the polymer matrix PMMA and dissolve it in chloroform to prepare a 2 wt% polymer solution. Weigh the host molecule 1,5-DAAQ and the annihilator molecule DPA at a mass ratio of 1:100 and add them to the above polymer solution. The total mass ratio of the host molecule and the annihilator molecule to the polymer is 1:500.

[0075] Ultrasonic treatment (50-100W, 2-5 min) or magnetic stirring (300-2000 rpm, 2-5 min) ensures complete dissolution and homogeneous mixing. The mixture is then dropped or spin-coated onto a clean substrate (such as glass, quartz, or PI film). The substrate is placed in a dark, inert atmosphere to allow the solvent to slowly evaporate (at room temperature or with moderate heating, such as 40°C), forming a uniform film (thickness controllable between 50-2000 nm). After drying, the solid-state photonic information processing material is obtained.

[0076] Example 5

[0077] (1) Spin state manipulation

[0078] Solvent polarity control: A series of solvents with different polarities (including methanol, THF, and toluene) were prepared. The polarity of the mixed solvent was continuously changed by precisely adjusting the mixing ratio. The polarity f(ε,n) of the mixed solvent varied from 0.014 to 0.31. Then, following the preparation method in Example 1, a series of liquid photonic information processing materials were prepared, and the luminescence information of each liquid photonic information processing material was tested. It is easy to find that with the change of solvent polarity, the ICT and ISC processes within the aminoanthraquinone molecule change significantly, resulting in a corresponding change in the population of the spin state. For example, see... Figure 2 As solvent polarity increases, the ICT process gradually intensifies, while the ISC process is suppressed, resulting in... 1The population of the CT state increases, while 3 The population of LE states decreases. 1 The gradual increase in the total amount of CT states is reflected in the gradual red shift of the emission peak, indicating that... 1 LE state 1 The transition of CT state emission. Combining transient absorption spectra and global fitting results, the influence of solvent polarity on the spin state population can be summarized; see [link to relevant documentation]. Figure 3 In toluene, which is less polar, the ISC process is dominant, while the ICT process is inhibited. 1 LE state and 3 The population of the LE state is relatively high. 1 The population of the CT state is almost non-existent. As solvent polarity increases, the ICT process gradually strengthens, while the ISC process is suppressed. 1 LE state 1 CT state transition, 3 The population of the LE state decreases as well. In this way, controllable transitions between different qubit states can be achieved.

[0079] Excitation power control: The photonic information processing material of Example 4 was excited using a 532nm laser with adjustable power (excitation power threshold of 2.3W·cm). -2 When the excitation power density is below 2.3 W·cm⁻¹ -2 At this time, the TTA-UC process follows a two-photon process, and the upconversion luminescence (UC-PL) intensity is proportional to the square of the excitation power; when the excitation power density is higher than 2.3 W·cm⁻¹, the intensity of the upconversion luminescence (UC-PL) is proportional to the square of the excitation power. -2 At this point, it transforms into a saturated pseudo-first-order process, and the UC-PL intensity is proportional to the excitation power. Utilizing this dependence of excitation power density, the state of the qubit can be controlled by precisely adjusting the excitation power. For example, appropriately increasing the excitation power can increase the... 3 The efficiency of the transition from the LE state to the S1 state of the annihilator alters the state distribution of the qubit. Tests showed that this efficiency is achieved when the excitation light power density ranges from 0 to 5 W·cm⁻¹. -2 During the change process, the system's luminescence gradually changes from orange to pinkish-white.

[0080] This change in luminous color can be used for information anti-counterfeiting. Examples are as follows:

[0081] The photonic quantum information processing material obtained in Example 4 was used for testing, and its excitation power threshold was 2.3 W·cm⁻¹. -2 At this point, a 532nm laser pointer (excitation power density less than 2.3W·cm²) is used. -2 When the photonic quantum information processing material is irradiated, it emits orange-red fluorescence, and the excitation power density is higher than 2.3 W·cm⁻¹. -2When irradiated, it transforms into a pinkish-white fluorescence. This color change is clearly discernible, responds rapidly, and is highly specific, independent of temperature or humidity. This material can be used on security tickets, product labels, document covers, and packaging edges for rapid verification of authenticity using a laser pointer. In practical applications, the photonic quantum information processing material can be patterned into QR codes, logos, characters, etc., displaying a set color only when the excitation power reaches a specific threshold, remaining invisible under other conditions. This achieves irreversible visual anti-counterfeiting identification based on an excitation power threshold. This solution is the first to introduce an excitation intensity gating mechanism into an anti-counterfeiting material system. Compared to traditional wavelength-responsive color-changing schemes, it offers significant advantages such as controllable dual emission paths, a clear response threshold, strong operability, and easy integration.

[0082] External magnetic field manipulation: A high-precision electromagnet system was constructed, capable of generating a uniform magnetic field within the range of 0-1500 mT, with a precision of ±0.1 mT. A quartz cuvette containing the photonic information processing material from Example 1 was placed at the center of the magnetic field, and magnetic fields of varying intensities were applied. Under the influence of the magnetic field, the spin state distribution of the triplet pair n[TT] (an intermediate in the TTA process) changes, thereby affecting the yield of the S1 state. For example, the yield of the S1 state reaches its maximum when a magnetic field of 200 mT is applied. This magnetic field manipulation allows for further precise control of the qubit state.

[0083] (2) Readout and encoding of spin states

[0084] Spin state readout: To achieve spin state readout, a device combining a high-sensitivity single-photon detector and a time-resolved fluorescence spectrometer was used to read out the photonic information processing material of Example 1. When the system is in different spin states, it emits fluorescence signals with different wavelengths and lifetimes. For example, 1 The fluorescence signal emitted by the CT state has a wavelength of approximately 585 nm and a lifetime of approximately 0.5 ns; the fluorescence signal emitted by the S1 state of the annihilator has a wavelength of approximately 420 nm and a lifetime of approximately 42 μs. By accurately measuring parameters such as the wavelength, intensity, and lifetime of the fluorescence signal, the spin state can be accurately determined. This operation is as follows: Figure 4 As shown.

[0085] Encoding: In this system, DPA and 1,5-DAAQ have independent and distinguishable emission channels in the short-wavelength (approximately 400-500 nm) and long-wavelength (>540 nm) ranges, respectively. These two emission channels can be considered as a readable optical system with dual-state output. To apply it to the field of quantum information, the following analog state is constructed:

[0086]

[0087] in, and Representing the absolute emission intensity from the DPA and 1,5-DAAQ channels respectively, |ψ opt The > symbol represents the output quantum state (output signal), while the ambient electric potential, excitation light power density, or applied magnetic field are the input signals. This form is the same as the amplitude encoding method commonly used in quantum computing, and can reflect the continuous change of the system's optical signal.

[0088] (3) Stability verification

[0089] After repeating the solvent polarity control, excitation power control, and external magnetic field control 100 times, the initialization, manipulation, and readout results of the spin state in each cycle were compared. It was found that the state fidelity remained above 95%, indicating that it has good stability.

[0090] Example 6

[0091] Provide a material for fluorescence lifetime-resolved imaging:

[0092] A CCD camera equipped with a time-gated module (gate width 1-100 μs) was used to perform confocal imaging on the photonic information processing material prepared in Example 2, acquiring fluorescence signals from short-lived channels (0-1 μs) and long-lived channels (10-50 μs). The short-lived channel clearly showed the ICT state distribution (λ = 590 nm), while the long-lived channel only detected the S1 state emission of DPA (λ = 430 nm); there was no crosstalk between the two signals. This experiment verified the feasibility of multi-channel information readout based on lifetime differences, providing a novel probe for bioimaging.

[0093] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A spin-state optically readable optical quantum information processing material, characterized by, The host molecule, the annihilator and the dispersion medium; The host molecule is an aminoanthraquinone derivative selected from the following structures: The triplet energy of the annihilator is less than or equal to the triplet energy of the host molecule, and the maximum emission peak wavelength of the annihilator does not overlap with the emission peak of the host molecule; The dispersion medium is selected from chromatographically pure solvents or polymers; Depending on the dispersion medium, the optical quantum information processing material can be in liquid or solid state.

2. The photonic quantum information processing material of claim 1, wherein, The annihilator is selected from the following structures:

3. The photonic quantum information processing material of claim 1, wherein The mass ratio of the host molecule to the annihilator is 1:50-1:2000.

4. The photonic quantum information processing material of claim 1, wherein, The solvent is selected from one or more of toluene, tetrahydrofuran and methanol; The polymer is selected from one or more of polymethyl acrylate, polymethyl methacrylate, polystyrene, polyvinyl alcohol and polyethylene glycol.

5. The preparation method of the optical quantum information processing material according to any one of claims 1-4, wherein the dispersion medium is selected from chromatographically pure solvents, and the preparation of the liquid optical quantum information processing material comprises the following steps: The host molecule and the annihilator are mixed in proportion, added to the chromatographically pure solvent, mixed, and deoxygenated to obtain the liquid optical quantum information processing material; The dispersion medium is selected from polymers, and the preparation of the solid optical quantum information processing material comprises the following steps: The host molecule and the annihilator are mixed in proportion, added to the polymer-containing solution, mixed, coated on a substrate, dried in a light-proof and oxygen-free environment, and the solid optical quantum information processing material is obtained.

6. The use of the optical quantum information processing material according to any one of claims 1-4 in the preparation of anti-counterfeiting materials and fluorescent imaging materials. The steps include:

7. A method for controllable adjustment of quantum bit state transition based on optical quantum information processing material, characterized in that, A series of chromatographically pure solvents with different polarities are prepared and sorted according to the polarity; The host molecule and the annihilator are mixed with the above solvents in a fixed proportion, mixed, and deoxygenated to obtain a series of liquid optical quantum information processing materials; The quantum bit state is switched according to the obtained change rule. By testing the luminescent information of the above series of liquid photonic information processing materials, the change rule of the proportion of the ICT process and the ISC process of the host molecules and the change rule of the proportion of the CT state and the LE state of the host molecules with the solvent polarity are determined. 1 CT state and 3 LE state are determined. The steps include:

8. A method for preventing forgery based on a light quantum information processing material, characterized by, The excitation power threshold of the optical quantum information processing material is determined; The optical quantum information processing material is constructed into an anti-counterfeiting pattern through a patterning template, and the anti-counterfeiting pattern is irradiated with laser with different excitation power thresholds to realize the color change of the anti-counterfeiting pattern. Irradiating the solid-state optical quantum information processing material with laser below the excitation power threshold value, the singlet state of the host molecules 1 The CT state luminescence dominates, and the luminescence color changes from red to orange, corresponding to the CIE coordinate change range of (0.62-0.45, 0.37-0.35); irradiating the solid-state optical quantum information processing material with laser above the excitation power threshold value, the singlet state of the annihilator largely participates, and the luminescence color changes from orange to pink white, corresponding to the CIE coordinate change range of (0.45-0.34, 0.35-0.23), and the regulation of the excitation power on the luminescence color is obtained; The steps include:

9. A method for fluorescence imaging based on a light quantum information processing material, characterized by, A CCD camera equipped with a time-gating module is used to perform confocal imaging of the liquid optical quantum information processing material, and the fluorescence signals of the 0-1 μs short-lifetime channel and the 10-50 μs long-lifetime channel are collected respectively to realize multi-channel information reading based on the lifetime difference. The gate width of the time-gating module is 1-100 μs.

10. The method of claim 9, wherein, ​

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