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46 results about "Rydberg state" patented technology

The Rydberg states of an atom or molecule are electronically excited states with energies that follow the Rydberg formula as they converge on an ionic state with an ionization energy. Although the Rydberg formula was developed to describe atomic energy levels, it has been used to describe many other systems that have electronic structure roughly similar to atomic hydrogen. In general, at sufficiently high principal quantum numbers, an excited electron - ionic core system will have the general character of a hydrogenic system and the energy levels will follow the Rydberg formula. Rydberg states have energies converging on the energy of the ion. The ionization energy threshold is the energy required to completely liberate an electron from the ionic core of an atom or molecule. In practice, a Rydberg wave packet is created by a laser pulse on a hydrogenic atom and thus populates a superposition of Rydberg states. Modern investigations using pump-probe experiments show molecular pathways – e.g. dissociation of (NO)₂ – via these special states.

Partial discharge detection system based on Rydberg atomic quantum coherence effect

The invention provides a partial discharge detection system based on a Rydberg atom quantum coherence effect, and the system comprises an optical excitation module which is used for transmitting two-photon laser to excite hot atoms to enter a Rydberg state; the atomic gas chamber is used for accommodating hot atoms and is coupled with an electromagnetic field generated by the partial discharge signal, so that the hot atoms generate energy level response change under the action of the electromagnetic field; the detection light path module is used for detecting a change signal of light signal intensity in the atomic gas chamber and converting the change signal into an electromagnetic response characteristic of an electromagnetic field; the signal acquisition and processing module is used for receiving the electromagnetic response characteristics, demodulating and analyzing the electromagnetic response characteristics and extracting characteristic parameters of the partial discharge signals; and the control and calibration module is used for receiving the characteristic parameters of the partial discharge signal, performing calibration based on an energy level frequency shift rule of Rydberg atoms, and outputting electric field intensity subjected to quantization calibration. The system can realize high-sensitivity, anti-interference and traceable detection of weak partial discharge signals.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD

Ytterbium-171 neutral atom-based quantum systems and methods

A quantum method includes providing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and exciting the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state. A quantum logic gate includes a first 171Yb qubit excited to a target Rydberg state and a second 171Yb qubit spatially separated from the first 171Yb qubit, wherein the second 171Yb qubit is not excited to the target Rydberg state while the first 171Yb qubit is excited to the target Rydberg state. A quantum computing system includes a chamber housing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and at least one gate laser source configured to excite the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state.
Owner:THE TRUSTEES OF PRINCETON UNIV

A method for reducing noise in electromagnetic measurements of rydberg atoms

This invention discloses a noise reduction method for electromagnetic measurements of Rydberg atoms. This method constructs a 509nm coupled optical closed-loop circulation system comprising a polarization beam splitter, a half-wave plate, and a high-reflection mirror. This enables multiple reciprocating propagations of the laser within the atomic gas chamber. Utilizing the optical path circulation mechanism, the coupling strength between light and atoms is significantly improved without increasing the laser source power, thus greatly enhancing the excitation efficiency of Rydberg states. Simultaneously, this structure allows the intermediate frequency carrier signal to linearly and coherently superimpose with the number of cycles, while the laser background noise accumulates incoherently only according to a square root law, thereby significantly improving the measurement signal-to-noise ratio. This invention solves the problems of low excitation efficiency and difficulty in eliminating laser background noise in existing single-path optical systems, providing a new solution with high excitation efficiency and high signal-to-noise ratio for high-sensitivity microwave electric field measurements.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV

CTC phase change-based high-precision microwave electric field intensity measurement system and method thereof

The invention provides a high-precision microwave electric field intensity measurement system and method based on CTC phase change, and belongs to the technical field of microwave measurement. Comprising a quantum sensing unit, an optical excitation and detection module, a microwave regulation and scanning module, an auxiliary radio frequency field module and a signal processing and control center. The method comprises the following steps: S1, preliminary preparation of Rydberg-state atoms; s2, preparing CTC phase atoms; s3, identifying a phase change critical point; and S4, measuring and calculating microwave electric field intensity measurement sensitivity improvement at the phase change critical point. According to the invention, a Rideburg system is prepared to a CTC phase change critical point area which is extremely sensitive to electric field intensity change response, and high-precision measurement of microwave electric field intensity is completed by using the extremely high gain of the system to an electric field intensity change signal at the moment.
Owner:UNIV OF SCI & TECH OF CHINA

Hardware-efficient neutral atom quantum computing method and device

The present disclosure relates to an apparatus and method for quantum computing using a plurality of neutral atoms in an optical trap array wherein a first internal state of the neutral atoms is used as a qubit ground state 0gt; the second internal state is used as a quantum bit excitation state 1gt; . According to the present disclosure, a local single qubit gate operation can be performed on a qubit, comprising locally and selectively irradiating with a qubit addressing laser at a first qubit addressing laser frequency, which is prepared as a qubit ground state 0gt; and a quantum bit excited state 1gt; a superposition state sgt; the quantum bit is used for causing a quantum bit ground state 0gt; and a quantum bit excited state 1gt; and the differential stark displacement is realized. Furthermore, a local dual qubit gate operation may be performed on the pair of qubits, including locally and selectively irradiating with a qubit addressing laser at a second qubit addressing laser frequency prepared as a qubit ground state 0gt; a pair of qubits for a third internal state cgt, preferably via neutral atoms; coupling the quantum bit pair to a Rydberg state rgt of a neutral atom; a third internal state cgt; the method can be used as a quantum bit ground state 0gt; a Rydberg state rgt is obtained; and the intermediate state of two-photon transition is realized.
Owner:MAX PLANCKGESELLSCHAFT ON THE ADVANCEMENT OF THE SCI SOCIETY EV +1

Ytterbium-171 neutral atom-based quantum systems and methods

A quantum method includes providing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and exciting the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state. A quantum logic gate includes a first 171Yb qubit excited to a target Rydberg state and a second 171Yb qubit spatially separated from the first 171Yb qubit, wherein the second 171Yb qubit is not excited to the target Rydberg state while the first 171Yb qubit is excited to the target Rydberg state. A quantum computing system includes a chamber housing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and at least one gate laser source configured to excite the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state.
Owner:THE TRUSTEES OF PRINCETON UNIV

A rydberg atom electric field sensing device and system

The application discloses a Rydberg atom electric field sensing device and system, and is applied to the field of quantum sensing.The device comprises an atom chamber, a first distributed feedback laser and a second distributed feedback laser.The first distributed feedback laser and the second distributed feedback laser each comprise a laser source resonant cavity formed inside.The first distributed feedback laser and the second distributed feedback laser generate laser based on optical feedback and optical amplification of the laser source resonant cavity inside each of them, and the laser is used as probe light and pump light respectively, and enters from one side of the atom chamber, so that the atoms in the atom chamber reach the excited state and the Rydberg state in turn.The application uses the distributed feedback laser as the pump light and the probe light for exciting the Rydberg atom, provides a miniaturized light source for the Rydberg atom electric field sensing device, improves the integration of the device, has the advantages of miniaturization, is easy to move, is suitable for a harsh outdoor environment, and can realize large-scale integration of chips.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2

Material comprising atoms excitable in rydberg states magnetized via inverse faraday effect.

PCT designated stageWO2026018088A1Quantum computersRadiation/particle handlingPrincipal quantum numberInverse Faraday effect
Material comprising atoms in Rydberg states magnetized via Inverse Faraday Effect having a magnitude of the effective magnetic field that scales substantially as the principal quantum number n raised to the power of 4 and method for magnetizing the material thereof, an atom-based quantum computing processor comprising a quantum platform populated with atomic quantum carriers configured to define qubits that are material as previously described and method for actuating the atom- based quantum computing processor thereof.
Owner:BALATSKY ALEXANDER

Broadband frequency hopping device based on high orbital angular momentum Rydberg atoms

The invention provides a broadband frequency hopping device based on high-orbital angular momentum Rydberg atoms. An atomic air chamber comprises the high-orbital angular momentum Rydberg atoms; the first reflecting mirror and the second reflecting mirror are respectively used for reflecting the detection light and the coupling light to the atom gas chamber so as to excite high-orbital angular momentum Rydberg atoms from a ground state to an excited state and pump the high-orbital angular momentum Rydberg atoms to a first Rydberg state; the first microwave generator, the second microwave generator and the third microwave generator are used for enabling high-orbital angular momentum Rydberg atoms to be transited to a second Rydberg state, a third Rydberg state and a fourth Rydberg state respectively; and the photoelectric detector is used for receiving the detection light passing through the atomic gas chamber. According to the invention, frequency hopping crossing 6 octaves can be realized, the frequency hopping speed is 60khops / s, and the frequency hopping point number is expanded under the limited instantaneous bandwidth by using the microwave frequency comb. The method has potential application value in the field of secret radio communication.
Owner:SHANXI UNIV

Tunable laser frequency stabilization system and method based on Rydberg atom direct current Stark

The invention relates to a tunable laser frequency stabilization system and method based on Rydberg atom direct current stark, and belongs to the technical field of laser frequency stabilization. The tuned frequency is determined by the atomic state and the voltage at the two ends of the polar plate and can be calculated through a theoretical model, the locked laser frequency has high precision and long-term stability, and the precision and the long-term stability are within MHz. In the invention, the atomic gas chamber with the built-in electrode plate is adopted to avoid the problem that a traditional gas chamber can shield a direct-current electric field, a direct-current electric field can be generated in the atomic gas chamber by applying a voltage to the two ends of the electrode plate, and an atomic energy level moves due to a direct-current stark effect, so that the tuning of the frequency of the coupled laser can be completed; the applied voltage is generally below 10V, the tuning range is between GHz and dozens of GHz according to different selected Rydberg states, and the operation is relatively convenient and simple.
Owner:BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH

A triple magic optical trap method and apparatus for Rydberg atom quantum computing

PendingCN122656012Aconditions metImprisonment is completeRydberg atomParticle physics
The application provides a triple magic optical trap method and device for Rydberg atom quantum computing, and relates to the technical field of quantum computing. The method comprises the following steps: measuring the change relationship between an atomic ground state and a transition resonance frequency with a bias magnetic field at several different trap depths, and determining a magic magnetic field strength; measuring the change relationship between the atomic ground state and the transition resonance frequency with a dipole optical trap wavelength under the condition of the optical trap, and comparing the change relationship with the case without a magnetic field, and determining a magic wavelength; under the conditions of the magic magnetic field and the magic wavelength, a circularly polarized dipole optical trap is turned on, so that the trapping potentials of and are the same. In the operation of a double-bit gate and other operations related to the Rydberg state, the optical trap is always kept on, atomic escape is effectively avoided, the double coherence of the ground state-ground state and the ground state-Rydberg state is maintained, and the optical structure is simple.
Owner:HUAZHONG UNIV OF SCI & TECH

Quantum electromagnetic field sensor

In one example, a sensor comprising a vapor cell including a vapor of alkali atoms is disclosed. The sensor further comprises a system configured to direct electromagnetic (EM) radiation of one or more frequencies into the vapor cell and incident on the vapor of alkali atoms. The EM radiation of one or more frequencies is configured to prepare the alkali atoms from a first quantum state to a Rydberg state. The alkali atoms prepared in the Rydberg state comprise an orbital angular momentum quantum number that is at least the number of quanta of the one or more frequencies. The sensor further comprises a detector configured to detect a response of the alkali atoms to incident electromagnetic radiation after the alkali atoms are prepared in the Rydberg state.
Owner:SRI INTERNATIONAL

A speed measuring device based on transient electromagnetic induction transparency effect

ActiveCN121231803BUltra-widebandRydberg atom
This invention relates to a velocity measurement device based on the transient electromagnetic induction transparency effect. It utilizes two probe beams and two coupling beams to excite atoms in an atomic antenna to the Rydberg state. The probe beams are modulated into pulsed lasers to obtain the transient electromagnetic induction transparency signal of the Rydberg atoms. A first radio frequency signal source radiates electromagnetic waves to illuminate the target object; the reflected electromagnetic waves and the local oscillator electromagnetic waves radiated by a second radio frequency signal source simultaneously act on the Rydberg atoms at near-resonance. The velocity of the target object is measured by quantum precision measurement of the difference frequency signal generated by the interference of the two electromagnetic waves. Compared to traditional Rydberg atomic antennas, this invention's velocity measurement device based on the transient electromagnetic induction transparency effect can achieve velocity measurement of moving targets based on ultra-wideband, miniaturized quantum detection, thus expanding the functionality of Rydberg atomic antennas.
Owner:SPACE STAR TECH CO LTD

A method and device for remote voice conversation interception based on Rydberg atoms

The application discloses a remote voice conversation listening method based on Rydberg atoms, which comprises the following steps: a probe light, a decoration light and a coupling light are used to cooperatively excite rubidium atoms in a rubidium atom gas chamber to a high Rydberg state, the frequency of the coupling light is scanned, an EIT spectrum is obtained, and an EIT resonance point is acquired; the frequency and power of a local microwave are adjusted, the frequency of the coupling light is scanned, and the EIT spectrum exhibits a critical state of AT splitting; the local microwave K L is used to scan the frequency of the coupling light after being reflected by a to-be-detected target to the rubidium atom gas chamber, an EIT-AT spectrum and a superposition spectrum of a vibration signal K S are acquired; the frequency of the coupling light is locked at the EIT resonance point, and the vibration signal K S is restored; and the vibration signal K S is denoised. The application further discloses a remote voice conversation listening device based on Rydberg atoms, wherein, when the device is used for listening, a vibration signal in a human voice frequency range is detected, and vibrations outside the human voice frequency are shielded. The application has a simple structure and does not need complex demodulation and filtering and amplifying links.
Owner:INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS

Single-quantum terahertz signal detection system and method based on Rydberg atoms

The invention provides a single-quantum terahertz signal detection system and method based on Rydberg atoms. Relates to the field of signal detection. The first laser is used for emitting detection laser so as to excite alkali metal atoms from a ground state to a low-energy-level state; the second laser is used for emitting coupled laser so as to excite the alkali metal atoms in the low energy level state to a first excitation state; the third laser is used for emitting Rydberg laser so as to excite the alkali metal atoms in the first excited state to the Rydberg state; the terahertz signal input port is used for receiving a terahertz signal to be detected so as to excite alkali metal atoms in a first excited state to a second excited state; and the single-photon detector is used for detecting fluorescent photons of visible light or infrared light released by the alkali metal atoms when the alkali metal atoms are in spontaneous radiation transition from the second excited state to the low-energy-level state so as to realize detection of the single-quantum terahertz signal.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY

Atom-based closed-loop control for electromagnetic radiation measurement, communications, and information processing

PendingUS20260186040A1Waveform analysisLoop control
A method for atom-based closed-loop control includes exciting atoms of a gas into one or more Rydberg states, applying one or more signal processing functions to the one or more Rydberg states, and regulating a characteristic of the applied one or more signal processing functions based on, at least in part, a response of the one or more Rydberg states to the one or more signal processing functions. A system for internal quantum-state-space interferometry includes an atomic receiver, an interferometric pathway, and a detector. The interferometer includes an atomic vapor with first atomic states and second atomic states. The interferometric pathway from RF phases between the first and second atomic states is closed by a quantum-state-space. The detector is configured to detect a readout of an interferometric signal. Embodiments include atom-based automatic level control, baseband processors, phase-locked loops, voltage transducers, raster RF imagers and waveform analyzers.
Owner:RYDBERG TECHNOLOGIES INC

A method and device for detecting partial discharge based on rydberg atoms

This application discloses a method and apparatus for partial discharge detection based on Rydberg atoms, relating to the field of partial discharge detection technology for power equipment. This application includes an optical field adjustment module surrounding an atomic gas chamber, comprising a phase delay element, a polarization element, and a drive adjustment mechanism. The drive adjustment mechanism dynamically adjusts the rotation angles of the phase delay element and the polarization element in real time, dynamically adjusting the polarization state and relative phase of the probe light and coupling light incident on the optical field adjustment module. The probe light and coupling light, processed by the optical field adjustment module, are then injected into an atomic gas chamber filled with alkali metal atoms, causing the alkali metal atoms to transition from their ground state to the Rydberg state and couple with the pulsed electric field generated by the partial discharge of the device under test. Partial discharge characteristic parameters are obtained through photoelectric detection and calculation. The technical solution disclosed in this application can dynamically calibrate optical field parameters in real time, ensuring detection accuracy and meeting the needs of long-term online monitoring in industrial settings.
Owner:NORTH CHINA ELECTRIC POWER UNIV

Methods of detecting electromagnetic fields, and systems implementing the same

PendingUS20250383386A1Electromagentic field characteristicsNon linear waveLight beam
A method of detection of electromagnetic fields is provided. The method includes the steps of: providing a first beam in a first direction through a vapor cell, the first beam having a frequency ωp; providing a second beam in a second direction through the vapor cell, the second beam having a frequency ωd; providing a third beam in the second direction through the vapor cell, the third beam having a frequency Ωc; frequency stabilizing the first beam, the second beam, and the third beam to successive stepwise resonant transitions resulting in the excitation of a Rydberg state; applying symmetrical radio frequency sidebands to the third beam, the symmetrical RF sidebands with frequency spacing ωRF from Φc;coherently transferring the symmetrical RF sidebands to the first beam via a nonlinear wave mixing in the vapor cell; and determining an electromagnetic field inside the vapor cell.
Owner:ROWAN UNIVERSITY

Electric field measuring device based on polymorphic Rydberg atoms

The utility model provides an electric field measuring device based on polymorphic Rydberg atoms, which comprises a sensing unit, a measuring unit and an upper computer control unit, the sensing unit comprises an atom probe, a detection light source device, a coupling light source device and a photoelectric detector, detection light and coupling light are respectively and oppositely incident to the atom probe, and the upper computer control unit is connected with the measuring unit. Atoms in the atom probe are excited from a ground state to a Rydberg state, and after initial EIT transmission peaks of detection light appear on a transmission spectrum, a photoelectric detector converts spectral signals into electric signals and outputs the electric signals to a measuring unit; the measuring unit outputs a control signal to the atomic probe and outputs EIT transmission spectrum data under different electric field intensities to the upper computer control unit, and the upper computer control unit identifies the EIT transmission spectrum data and outputs an electric field intensity result. The utility model solves the problems that the strong field measurement accuracy and the electric field resolution are insufficient, and the measurement bandwidth is difficult to be further improved.
Owner:BEIJING KEWEI QUANTUM TECHNOLOGY CO LTD

Environmental evaluation method, device and equipment of Rydberg atomic electric field sensor and medium

The invention discloses an environment evaluation method, device and equipment for a Rydberg atomic electric field sensor and a medium, and relates to the technical field of computers, and the method comprises the steps: preparing a target Rydberg state in an atomic gas chamber of the Rydberg atomic electric field sensor, so as to form an electromagnetic induction transparent readout chain; on the electromagnetic induction transparent readout chain, electric field intensity observation under different interferences is carried out in parallel based on a preset field intensity inversion formula, preset physical field interference experiment configuration information and a corresponding preset interference error analysis strategy so as to determine a temperature and humidity error value, an electric field intensity error value and a magnetic field intensity error value; and determining a target environment evaluation result based on the temperature and humidity error value, the electric field intensity error value, the magnetic field intensity error value, the task spectrum weight configuration information and the engineering grading information so as to complete the inspection operation of the Rydberg atomic electric field sensor by using the target environment evaluation result. The reliability, the accuracy, the stability and the repeatability of the evaluation result can be improved.
Owner:STATE GRID CHONGQING ELECTRIC POWER COMPANY MARKETING SERVICE CENTER +1

Miniaturized cold Rydberg atom antenna device and noise two-mode suppression method

ActiveCN120980757BRydberg atomMagneto-optical trap
The application provides a miniaturized cold Rydberg atom antenna device and a noise double-mode suppression method, relates to the technical field of quantum information, and vacuum compatible integrated atom source modules maintain the vacuum degree of a glass vacuum cavity through outgassing sheets and getter sheets; a low-temperature magnetic optical trap can cool atomic gas and gather the cold atomic gas into an F-P cavity; a Rydberg atom detection module can use coupling light to excite atoms to a Rydberg state, use detection light to detect information when cold Rydberg state atoms are split by EIT-AT after a microwave electric field is applied, and generate a main detection signal; an F-P cavity fluorescence suppression module can collect fluorescence emitted by cold Rydberg state atoms and generate a fluorescence noise signal; and a signal processing module can eliminate fluorescence noise based on the main detection signal and the fluorescence noise signal. Through the above mode, the problems that a Rydberg atom antenna device based on cold atoms is large in size and difficult to suppress fluorescence noise are solved, and the detection performance of the device can be improved.
Owner:LIANGYI WANXIANG (BEIJING) TECHNOLOGY CO LTD

Microwave detection device and method of fiber integrated rydberg atom

The application provides a microwave detection device and method for fiber integrated Rydberg atoms, which comprises an optical excitation module, a bubble echo-wall microcavity, a microwave coupling module, a light splitting module, a signal conditioning module and a main control module; a tapered optical fiber is used to couple the near field of the combined light formed by the detection light and the coupling light into the bubble microcavity, so that the combined light field circulates and propagates in the echo-wall mode and fully interacts with the alkali metal atom vapor to excite a stable EIT spectrum; the microwave coupling module is used to converge the microwave to be detected into the bubble microcavity, and resonates with the atoms in the Rydberg state in the bubble microcavity to induce energy level splitting, so as to modulate the light field transmittance; the signal conditioning module is used to convert the transmitted light led out by the tapered optical fiber from an optical signal into an electrical signal, and extract the spectral characteristics of the microwave to be detected from the electrical signal; and the main control module is used to determine the microwave parameters of the microwave to be detected based on the spectral characteristics. The application improves the detection stability and detection sensitivity of the microwave detection device.
Owner:BEIJING UNIV OF TECH +1

A system and method for preparing a Rydberg state based on orthogonal polarization detection and dual-wavelength in-situ frequency stabilization

The application discloses a kind of preparation system and method of Rydberg state based on orthogonal polarization detection and dual-wavelength in-room frequency stabilization, belong to quantum optics and precise measurement field.System includes: atomic gas chamber, first / second wavelength laser, modulation transfer spectrum frequency stabilization unit, dual-wavelength in-room coupling unit, orthogonal polarization detection unit and servo feedback control system.Method by modulation transfer spectrum locking probe light frequency;By dual-wavelength in-room coupling, modulation information is transferred to coupling light across wavelength;By orthogonal polarization detection, the polarization state change caused by the interaction of coupling light and atom resonance is extracted, error signal is generated and coupling light frequency is locked.The core of the application is: only resonance atom causes coupling light field polarization state rotation, non-resonant atom has no contribution;By polarimeter to the polarization component of outgoing light screening, only extract the polarization rotation signal produced by resonance atom, effectively suppress the high DC background noise of laser itself, greatly improve signal purity and signal-to-noise ratio.
Owner:HANDAN INNOVATION INST OF PEKING UNIV +1

A network node

This invention provides a network node comprising: an optical fibre interface configured to receive, from one or more remote optical sources, a first optical signal, a second optical signal and a third optical signal, wherein the first, second and third optical signals each have a respective wavelength within an optical fibre transmission band being one of the O-band, E-band, S-band, C-band, L-band, and U / XL-band; one or more wavelength converters configured to convert the wavelength of one or more of the first optical signal, second optical signal and third optical signal; and a Rydberg-atom based transmission medium configured to be excited by the first optical signal, second optical signal and third optical signal, following wavelength conversion of one or more of the first optical signal, second optical signal and third optical signal, such that electrons of the Rydberg-atom based transmission medium are excited to a predetermined Rydberg state.
Owner:BRITISH TELECOM PLC

Hardware-efficient neutral atom quantum computing method and device

A method for quantum computing using neutral atoms in an array of optical traps, wherein a first internal state serves as qubit ground state |o>, and a second internal state serves as qubit excited state |1>, includes performing a local single-qubit gate operation comprising: locally and selectively illuminating a qubit prepared in a superposition state |s> of qubit ground state |0> and qubit excited state |1> with a qubit addressing laser at a first qubit addressing laser frequency to cause a differential Stark shift for the qubit ground state |0> and the qubit excited state |1>. The method also includes performing a local two-qubit gate operation comprising: locally and selectively illuminating a pair of qubits prepared in the qubit ground state |0> with the qubit addressing laser at a second qubit addressing laser frequency for coupling the pair of qubits to a Rydberg state |r>.
Owner:MAX PLANCK GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN EV +1

Ultrafast detector of rydberg atoms

A device, comprising at least one monochromatic light source configured to generate a first optical trap; an ensemble of particles disposed in the first optical trap, each particle of the ensemble of particles being excitable to a first Rydberg state and a second Rydberg state, the second Rydberg state having a blockade radius, each particle of the ensemble of particles being within the blockade radius of each other and within the blockade radius of an atomic qubit, the atomic qubit being a particle that is excitable to the second Rydberg state, the ensemble of particles having a first transmissivity at a first wavelength when neither any particle of the ensemble of particles nor the atomic qubit is in the second Rydberg state, the ensemble of particles having a second transmissivity at the first wavelength when the atomic qubit is in the second Rydberg state, the second transmissivity being lower than the first transmissivity; and a second monochromatic light source configured to drive each particle of the ensemble of particles into the first Rydberg state; a probe light source configured to direct a probe beam having the first wavelength to the ensemble of particles; and a photosensor configured to determine the state of the atomic qubit.
Owner:PRESIDENT & FELLOWS OF HARVARD COLLEGE +1

A high-sensitivity microwave receiving system and method with atomic polarization enhancement

The application discloses a high-sensitivity microwave receiving system and method with atomic polarization enhancement, and the system comprises a first laser, an atomic gas chamber, a second laser, a dichroic mirror, a photodetector, a first signal source, a second signal source, a first antenna, a second antenna and a host computer. The method is characterized in that: the first signal source is used to generate a pulsed microwave field to prepare an atomic initial state to a specific ground state; the first laser is used to generate detection light which is resonant with an atomic ground state and a metastable state energy level transition; the second laser is used to generate coupling light which is resonant with an atomic excited state and a Rydberg state energy level transition; the detection light and the coupling light are used to excite the atom to the Rydberg state; the second signal source is used to generate a microwave field which is jointly used to cause periodic changes of atomic energy levels, and the microwave field is used to generate periodic modulation on the intensity of the detection light; the power of the modulation signal is proportional to the power of a to-be-measured microwave, and the to-be-measured microwave receiving measurement is realized. The atomic polarization enhancement method can increase the number of atoms participating in the microwave measurement, and improve the microwave receiving performance.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES

Miniaturized cold Rydberg atom antenna device and noise dual-mode suppression method

ActiveCN120980757AMasersAcceleratorsRydberg atomMagneto-optical trap
The invention provides a miniaturized cold Rydberg atom antenna device and a noise dual-mode suppression method, and relates to the technical field of quantum information. A vacuum compatible integrated atom source module maintains the vacuum degree of a glass vacuum cavity through a gas release sheet and a getter sheet; the low-temperature magneto-optical trap can cool the atomic gas and gather the cold atomic gas into the F-P cavity; the Rydberg atom detection module can excite atoms to be in a Rydberg state through coupling light, after a microwave electric field is applied, information generated when cold Rydberg state atoms are subjected to EIT-AT splitting is detected through detection light, and a main detection signal is generated. The F-P cavity fluorescence suppression module can collect fluorescence emitted by the cold Rydberg state atoms and generate a fluorescence noise signal; the signal processing module may cancel fluorescence noise based on the main detection signal and the fluorescence noise signal. By means of the mode, the problems that a Rydberg atom antenna device based on cold atoms is large in size and difficult in fluorescence noise suppression are solved, and the detection performance of the device can be improved.
Owner:LIANGYI WANXIANG (BEIJING) TECHNOLOGY CO LTD

System and method for quantum non-demolition photon counting using a rydberg atom array

A quantum non-demolition photon counter includes a quantum system, a processor, and a memory. The quantum system includes photons. The memory includes instructions stored thereon, which, when executed by the processor, cause the system to: couple an initial photonic state of the quantum system to an array of atoms in a |g-|e transition; store the photon(s) in the array using a classical control field acting on the |s-|e transition; oscillate the array between the states |s and |r, where |r is a Rydberg state; and perform a projective measurement of a presence of a Rydberg excitation by indirectly and progressively measuring a photon number n by directly and repeatedly measuring the presence of the Rydberg excitation after under Ĥ for a predetermined period of time. The array of atoms is initially in a ground state |g and |e is an excited state.
Owner:THE GOVERNMENT OF THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY DEPARTMENT OF HEALTH & HUMAN SERVICES +1

Ytterbium-171 neutral atom-based quantum systems and methods

A quantum method includes providing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and exciting the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state. A quantum logic gate includes a first 171Yb qubit excited to a target Rydberg state and a second 171Yb qubit spatially separated from the first 171Yb qubit, wherein the second 171Yb qubit is not excited to the target Rydberg state while the first 171Yb qubit is excited to the target Rydberg state. A quantum computing system includes a chamber housing a plurality of atoms including first and second 171Yb atoms spatially separated from one another and at least one gate laser source configured to excite the first 171Yb atom to a target Rydberg state without exciting the second 171Yb atom to the target Rydberg state.
Owner:THE TRUSTEES OF PRINCETON UNIV