26 results about "Teleportation" patented technology

Quantum teleportation is essential for many quantum information technologies, including long-distance quantum networks. Using fiber-coupled devices, including state-of-the-art low-noise superconducting nanowire single-photon detectors and off-the-shelf optics, we achieve conditional quantum teleportation of time-bin qubits at the telecommunication wavelength of 1536.5 nm. We measure teleportation fidelities of ≥90% that are consistent with an analytical model of our system, which includes realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleport qubits over 22 km of single-mode fiber while transmitting qubits over an additional 22 km of fiber. Our systems, which are compatible with emerging solid-state quantum devices, provide a realistic foundation for a high-fidelity quantum Internet with practical devices.

Quantum teleportation is essential for many quantum information technologies, including long-distance quantum networks. Using fiber-coupled devices, including state-of-the-art low-noise superconducting nanowire single-photon detectors and off-the-shelf optics, we achieve conditional quantum teleportation of time-bin qubits at the telecommunication wavelength of 1536.5 nm. We measure teleportation fidelities of ≥9% that are consistent with an analytical model of our system, which includes realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleport qubits over 22 km of single-mode fiber while transmitting qubits over an additional 22 km of fiber. Our systems, which are compatible with emerging solid-state quantum devices, provide a realistic foundation for a high-fidelity quantum Internet with practical devices.

The present invention discloses a continuous variable bidirectional quantum teleportation device, comprising an interconnected entangled source, an input optical path, and an output optical path. The input optical path and the output optical path of the scheme both comprise a beam splitter with an adjustable splitting ratio, two beam splitters, two balanced zero-beat detectors, an amplitude modulator, and a phase modulator. The beam splitter with an adjustable splitting ratio is connected to the EPR entangled source, the two balanced zero-beat detectors of the input optical path are respectively connected to the amplitude modulator and the phase modulator of the output optical path, and the two balanced zero-beat detectors of the output optical path are respectively connected to the amplitude modulator and the phase modulator of the input optical path. The continuous variable bidirectional quantum teleportation scheme provided by the present invention can realize a bidirectional teleportation process under a pair of EPR entangled lights. Using this scheme to construct a quantum network and quantum conference can significantly increase the number of users that can be carried in the network and conference under fixed entangled resources.

The application discloses a virtual character control method and device, a storage medium and an electronic device. The method comprises the following steps: in response to a first dragging operation on a virtual joystick in a movement control area, controlling a target virtual character to move in a game scene; in response to the first dragging operation meeting a preset condition, generating a teleportation control area in the movement control area, the teleportation control area being used for triggering the target virtual character to release a teleportation skill; in response to a second dragging operation on the virtual joystick in the teleportation control area, determining a teleportation direction of the target virtual character according to a dragging position of the second dragging operation; and in response to the end of the second dragging operation, controlling the target virtual character to release the teleportation skill according to a corresponding teleportation direction at the end position, so that the teleportation skill of the game character can be realized, and the richness of the game skill is improved.

A method performed by Charlie in a quantum communication system, according to one embodiment of the present disclosure, may comprise the steps of: forming a first Bell-state resource between a first qubit and a qubit included in Alice; forming a second Bell-state resource between a second qubit and a qubit included in Bob; transforming, into a first Greenberger-Horne-Zeilinger (GHZ) state, a three-qubit state from among the second qubit, a third qubit, and the qubit included in Bob; performing a Bell-state measurement between the first qubit and the second qubit; transforming, on the basis of the Bell-state measurement performing result, a three-qubit state from among the third qubit, the qubit included in Alice, and the qubit included in Bob into a second GHZ state, and performing entanglement teleportation by using the second GHZ state as a resource.

There is provided a method of performing a data-data controlled-unitary gate between a first data qubit as control in a first basis (|e0〉, |e1〉) and a second data qubit as target, and wherein the unitary gate of the controlled-unitary matrix is defined by a unitary matrix U, the method comprising the following operations: (i) providing the first data qubit in the first basis (|e0〉, |e1〉), the second data qubit, and an ancilla qubit, wherein each data qubit is connected to the ancilla qubit and wherein the first and second data qubits are not directly connected to each other, wherein the first data, second data, and ancilla qubits are all either (A) physical qubits each hosted in a respective physical mode of one or more physical resonators or (B) logical qubits each hosted by a plurality of physical qubits which are configured to perform an error correction code to encode the respective logical qubits; (ii) configuring the ancilla qubit to be able to perform a controlled-unitary gate with either of the first and second data qubits. The method further comprises the following operations: (iii) performing a first one-qubit state teleportation of the first data qubit to the ancilla qubit from the first basis (|e0〉, |e1〉) to a second basis (|g0〉, |g1〉) by: (a) preparing a two-qubit state entangling the first data qubit and the ancilla qubit, and (b) subsequently performing a measurement-based uncomputation of the first data qubit; (iv) performing an ancilla-data controlled-unitary gate between the ancilla qubit as control in the second basis (|g0〉, |g1〉) and the second data qubit as target; (vi) performing a second one-qubit state teleportation of the ancilla qubit to the first data qubit from the basis (|g0〉,|g0〉) to the basis (|e0〉, |e1〉) by: (a) preparing a second two-qubit state entangling the ancilla qubit and the first data qubit, and (b) subsequently performing a measurement-based uncomputation of the ancilla qubit. Operation (iv) is performed at any time before operation (vi)(b), operation (vi)(a) is performed after operation (iii)(b), and wherein (I) the unitary gate of the ancilla-data controlled-unitary gate is defined by the unitary matrix U, or (II) the unitary gate of the ancilla-data controlled-unitary gate is defined by another unitary matrix V and the method comprises a sequence of one or more gates that, in combination with the unitary V-gate of the ancilla-data controlled-unitary gate, performs the function of applying the unitary U-gate on the second data qubit. There is also provided a quantum system, a computer program product, and a computer-readable medium.

The present application relates to the technical field of distributed quantum computing, and more particularly to a distributed quantum circuit teleportation optimization method based on gate exchange pruning. The problem of long solving time or excessive expansion branches caused by the lack of fine pruning and state merging mechanism is solved. The technical scheme is as follows: step S1: quantum circuit analysis and data structure establishment; step S2: weighted interaction graph construction and candidate partition set generation; step S3: global gate identification and single-pass teleportation construction; step S4: pruning search to solve the minimum single-pass teleportation times and plan output. The beneficial effects of the present application are as follows: compared with the prior art, the present application has more sufficient and verifiable beneficial effects: the global communication overhead can be directly quantified to decrease; the single batch throughput is improved and the redundant teleportation is reduced; and the solution cost is significantly reduced.

The invention provides a barrier special effect generation method. The method comprises the following steps: acquiring a sequence frame material containing a plurality of channels; extracting a depth-of-field channel from the sequence frame material; creating a programmed noise texture; drawing a special effect area by using a brush tool; and performing image synthesis processing on the depth-of-field channel, the programmed noise texture and the special effect region to generate a barrier special effect. Through the method provided by the embodiment of the invention, the barrier special effect can be quickly and efficiently generated in a post-processing link, the tedious process of special effect simulation and light matching through DCC software in a traditional mode is avoided, the time cost required by repeated rendering adjustment is reduced, and the flexibility and efficiency of special effect production are improved. Meanwhile, according to the method, through combined processing of the depth-of-field channel, the programmed noise texture and the special effect area, the generated barrier special effect has rich details and a sense of reality, and the method is suitable for visual presentation of energy columns, energy fields or transmission doors of various space buildings.

Disclosed examples relate to extracting a magic state on a quantum computing device, the magic state encoded in a [[n, k, d]] block code including an outer code. One example provides a method that includes preparing an encoded noisy magic state using data qubits and measuring a Clifford stabilizer on the data qubits, thereby applying an inner code. The method further includes initializing output qubits and initiating a teleportation of an extracted magic state derived from the encoded noisy magic state to the output qubits. The method further includes measuring an X stabilizer on the data qubits, post-selecting based on the result, destructively measuring each data qubit with a Z stabilizer, and applying one or more post-selection conditions to the data qubits to complete the teleportation of the extracted magic state to the output qubits.

Apparatuses, systems, and techniques providing a teleportation system combining virtual reality and augment reality are provided. A first set of data associated with a real-world environment is received. An object in the real-world environment, and a first location of the object, are identified based on a subset of the first set of data. A second location of a first user within the real-world environment is identified based on the first set of data. A second set of data representing a first avatar of a guest user is received. A virtual representation of the real-world environment is generated based on the first and second sets of data, comprising the object positioned at the first location and at least one of a second avatar of the first user or the first avatar of the guest user. The virtual representation is send to a computing system associated with the guest user.

In a virtual object control method, a reference image is obtained. A teleportation control element is output for display based on the reference image including information about a virtual environment. A first virtual object controlled by a player is teleported to a reference position in the virtual environment based on a trigger operation performed on the teleportation control element. The reference position is based on one of a position of a second virtual object in the virtual environment and a position associated with the reference image in the virtual environment.

To automatically and instantly move a character of a user in a metaverse space in accordance with a schedule to make it efficient for the user to join a meeting and to improve convenience of the user.SOLUTION: A metaverse automatic and instant movement system has a user interface, a schedule information acquiring module, a meeting place specifying module, an instant movement module, and a server apparatus. The user interface provides a function for a user to carry out synchronization settings for a calendar application, permission settings for instant movement, and notification settings. The schedule information acquiring module acquires schedule information of the user by using a calendar API and analyzes the acquired information to hold the latest schedule information. The meeting place specifying module analyzes the schedule information to refer to a place database for specifying coordinates of the meeting place.SELECTED DRAWING: Figure 1

An object of the present disclosure is to provide a player with a movement experience as if the player instantaneously moved from a first space to a second space provided in a virtual space.SOLUTION: An information processing system includes a processor configured to cause a moving body avatar to move in a virtual space in synchronization with movement of a moving body in a real space, the moving body avatar representing the moving body on which a player rides in the real space, the avatar riding on the moving body avatar including: When a player avatar representing the player contacts a first object arranged in a first space in the virtual space, the moving body avatar and the player avatar are moved to a position of a second object that is arranged in a second space corresponding to the first space in the virtual space and corresponds to the first object.SELECTED DRAWING: Figure 1

The invention provides a target tracking method and device, electronic equipment and a storage medium, and the method comprises the steps: determining a first distance between a current position of a controlled virtual character and a target point through responding to a tracking operation for the target point in a virtual scene; whether a target transmission point exists in the virtual scene is determined, and a second distance between the target transmission point and the target point is smaller than the first distance; in response to the target transmission point existing in the virtual scene, transmission information corresponding to the target transmission point is displayed on the graphical user interface, and the transmission information is used for prompting to trigger the target transmission point so as to transmit the controlled virtual character to the target transmission point. Through the method provided by the embodiment, the system can intelligently identify and prompt the optimal transmission point, the operation step that a player needs to manually search for the optimal transmission point is simplified, and the interaction experience is remarkably improved; meanwhile, the game tracking mechanism is enriched through the quick transmission function, the strategy and interestingness of the game are increased, and the richness of the game is improved.

The invention discloses a game control method, device and equipment and a computer readable storage medium, and belongs to the technical field of computers. The method comprises the following steps: receiving a reference image sent by a first terminal, wherein the first terminal is a terminal for controlling a first virtual object; in response to the information that the reference image contains the virtual environment, displaying a transmission control in a first game interface, the first game interface being an interface of a game in which a currently controlled second virtual object participates; in response to a trigger operation of the transmission control, the second virtual object is transmitted to a reference position in the virtual environment, and the reference position comprises the position of the first virtual object in the virtual environment or the position of a reference image shot in the virtual environment. According to the method, the second virtual object is directly transmitted to the reference position through triggering of the transmission control, so that the time of searching the reference position in the virtual scene by the second virtual object can be saved, and the interactivity and the game experience of a game are improved.

This application provides an immersive telemanipulation system for a robotic arm based on mixed reality force mapping, including master-end control, slave-end execution, communication transmission, spatiotemporal synchronization, heterogeneous kinematic mapping, bidirectional force control, edge trajectory planning, and mixed reality presentation modules. The master end collects joint motion information, while the slave end collects interactive forces, tactile deformation, and environmental images. The spatiotemporal synchronization module achieves synchronization between visual and force feedback through predictive motion compensation. The heterogeneous mapping module utilizes an adaptive scaling matrix and null-space projection to achieve high-precision master-slave mapping. Bidirectional force control estimates environmental stiffness online through a perturbation observer and adaptively switches between force and position hybrid control. Edge planning employs sparse sampling and temporal elastic band optimization to achieve lightweight real-time obstacle avoidance. The mixed reality presentation registers a virtual robotic arm and overlays force vectors and safety boundaries, adaptively switching display modes based on lighting conditions. This invention significantly improves the sense of presence, operational accuracy, and safety of telemanipulation.

The application discloses a quantum teleportation communication security enhancement method and system based on a Turbo code, aiming at a classical Rayleigh channel, error correction is carried out by using a classical Turbo code, so that the measurement result can be reliably transmitted from a transmitting end to a receiving end, and the QBER and BER of the system are significantly improved. Under the condition of a quantum depolarization channel, the influence of classical channel errors and quantum channel errors on the QBER is analyzed in depth, transmission of pre-shared entangled quantum bits is protected by using a quantum error correction Shor code, and finally, a safe and reliable teleportation protocol is obtained by using a QSDC scheme and verifying entangled quantum bit pairs by a trusted third party, so that the quantum communication demand in various application scenarios can be met.

The present invention discloses a method, device, and system for achieving a portal effect in a virtual scene. The method comprises: constructing a virtual scene, acquiring images from cameras belonging to a portal and a destination gate, calculating the positions of the cameras belonging to the portal and the destination gate, and the screen space of the corresponding entrance plane; determining whether a game model has passed through the portal and calculating the position of the game model after the teleportation; establishing a replica of the game model, and when the position of the game model exceeds halfway beyond the portal, swapping the position of the replica with the position of the game model to achieve teleportation of the game model; using a surface shader mounted on a player model mesh to completely remove the game model from the portal area; and recursively displaying the teleported image acquired by the destination gate camera in the destination gate entrance plane on the portal entrance plane. The present invention achieves a portal effect that reflects the actual teleportation of objects in a virtual scene and a physical effect.

Systems and techniques for active quantum memory (AQM) and quantum circuits with feedback are described. For instance, one or more aspects of the present disclosure may enable the indefinite storage of one or more qubits via a sequence of quantum teleportations or quantum swaps involving the rapid periodic executions of a standard teleportation or swap protocols with feedback (e.g., provided the total feedback cycle time is less than the decoherence time for a qubit). The stored quantum state may be passed repeatedly back-and-forth between two of the qubits, and the stored quantum state may be maintained by the input energy on each cycle required to initialize the entangled qubit pair (e.g., where the cycle period is chosen to be less than the decoherence time of the qubits to maintain state information over many cycles).

An example embodiment provides a technique for a distributed quantum Fourier transform (QFT) with reduced EPR pairs. The QFT may be run in a quantum datacenter between multiple data units, where embodiments run the QFT while using multiple resources. The technique implements a QFT(n) (a QFT with n qubits) on two quantum processors, and is extended to implement the QFT(n) on three or more quantum processors. At the culmination of the technique, the qubits are properly positioned (in reverse order) among the quantum processors to obviate swapping of the qubits at completion of the QFT circuit. The technique relies on teleportation of the qubits.

The invention provides an animation generation method and apparatus, a device, a medium and a program. The method comprises the steps of obtaining image information and input information; analyzing the input information, extracting condition information and generating control parameters; inputting the image information, the condition information and the control parameters into a key frame generation model to generate a key frame image sequence; and generating an animation based on the key frame image sequence, the image information and the condition information. Motion correlation and space-time dependency between images are captured through a key frame generation model, iteration is carried out step by step through diffusion, motion deviation possibly causing transient movement is continuously corrected, and therefore continuity between key frames is guaranteed.

The biomimetic platform described herein includes a fluid synthesis device having a first fluid input selectively coupleable to a source of a first input fluid solution and a second fluid input selectively coupleable to a source of a second input fluid solution. The fluid synthesis device further includes a fluid output. The biomimetic platform further includes a fluid addressing system having a fluid input fluidically coupled to the fluid output of the fluid synthesis device. The fluid addressing system further includes a first fluid output and a second fluid output. The biomimetic platform further includes a first biomimetic device having a fluid input fluidically coupled to the first fluid output of the fluid addressing system and a second biomimetic device having a fluid input fluidically coupled to the second fluid output of the fluid addressing system.

The invention provides an information processing method, and the method comprises the steps: generating a first target prop in response to an interaction operation between a first virtual object of the first target prop and a target interaction object of the first target prop; in response to an acquisition operation of the first virtual object of the first target prop on the first target prop, the first virtual object of the first target prop is adjusted from an initial form to a target form, and the target form of the first target prop and the initial form of the first target prop have different visual display effects; and when the first virtual object of the first target prop is in the target form of the first target prop, in response to an interaction operation between the first virtual object of the first target prop and a first target prop transmission object, controlling the first virtual object of the first target prop to perform position transmission in the game scene. The player can obtain the opportunity of form transformation through interaction with the target interaction object, so that the special transmission movement capability is unlocked.

A hybrid quantum communication network (QCN) can serve as the backbone for a future quantum Internet, thus providing extensive long-term impacts on the economy and national security through QIP, distributed quantum computing, quantum networking, and distributed quantum sensing. By employing photon addition and photon subtraction modules, the network can generate hybrid DV-CV entangled states and implement teleportation and entanglement swapping through entangling measurements. Transmission distance between nodes can be extended by employing macroscopic light states, noiseless amplification, and reconfigurable quantum LDPC coding.

The invention discloses a continuous variable bidirectional quantum invisible state transmission device, which comprises an entanglement source, an input light path and an output light path which are connected with one another, and the input light path and the output light path in the scheme respectively comprise a beam splitter with an adjustable beam splitting ratio, two beam splitters, two balance zero-beat detector amplitude modulators and a phase modulator. The beam splitter with the adjustable beam splitting ratio is connected with the EPR entanglement source, the two balance zero-beat detectors of the input light path are connected with the amplitude modulator and the phase modulator of the output light path respectively, and the two balance zero-beat detectors of the output light path are connected with the amplitude modulator and the phase modulator of the input light path respectively. According to the continuous variable bidirectional quantum teleportation scheme provided by the invention, the bidirectional teleportation process under a pair of EPR entangled light can be realized; and the quantum network and the quantum conference constructed by using the scheme can significantly improve the number of bearable users in the network and the conference under fixed entangled resources.

This application discloses a quantum message authentication method and apparatus based on quantum teleportation, relating to the fields of quantum communication and information security. It includes: a transmitter distributing a second particle from an entangled particle pair to a receiver, while retaining the first particle; generating multiple sets of classical authentication information based on the original message and predetermined authentication rules; encoding each set of authentication information onto the quantum state of an auxiliary particle; performing a Bell kinematic measurement on the encoded auxiliary particle and its corresponding first particle, outputting the classical measurement result; and sending the measurement result to the receiver, enabling the receiver to obtain the original message. The receiver, using its held second particle, the received classical measurement result, and the original message, reconstructs the authentication information generated by the transmitter and verifies the original message according to the authentication rules. This application combines quantum teleportation with classical authentication rules, transmitting critical authentication information through a physically secure quantum channel, effectively resisting quantum computing attacks and man-in-the-middle attacks.