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1.发明公开公开(公告)号：US20240353579A1
公开(公告)日：2024-10-24
申请号：US18474881
申请日：2023-09-26
发明人： Jaewook AHN , Kangheun Kim
摘要： The present disclosure relates to a method and device for the tomography of a Rydberg atom graph using a location-adjustable ancilla qubit. The method and device may be configured to prepare at least one ancilla qubit around a Rydberg atom graph of interest having at least one atom, measure interactions between the Rydberg atom graph and the ancilla qubit while adjusting a location of the ancilla qubit around the Rydberg atom graph, and reconstruct a quantum state of the Rydberg atom graph based on the measured interactions.
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公开(公告)号：US12124321B2
公开(公告)日：2024-10-22
申请号：US18096982
申请日：2023-01-13
申请人： Fort Robotics, Inc.
CPC分类号： G06F11/0706 , G06F11/0724 , G06F11/0751 , G06F11/0766 , G06F11/079 , G06N10/70 , H03M13/1525 , H03M13/1575 , H03M13/19 , G06F11/008
摘要： A method includes, storing a set of valid codewords including: a first valid functional codeword representing a functional state of a controller subsystem; a first valid fault codeword representing a fault state of the controller subsystem and characterized by a minimum hamming distance from the first valid functional codeword; a second valid functional codeword representing a functional state of a controller; and a second valid fault codeword representing a fault state of the controller; in response to detecting functional operation of the controller subsystem, storing the first valid functional codeword in a first memory; in response to detecting a match between contents of the first memory and the first valid functional codeword, outputting the second valid functional codeword; in response to detecting a mismatch between contents of the first memory and every codeword in the first set of valid codewords, outputting the second valid fault codeword.
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3.发明公开公开(公告)号：US20240322914A1
公开(公告)日：2024-09-26
申请号：US18125840
申请日：2023-03-24
发明人： Guilu LONG , Dong PAN , Penghao NIU , Haoran ZHANG , Feihao ZHANG , Min WANG , Chao ZHENG , Xiuwei CHEN
摘要： The present application relates to a quantum secure direct communication method and apparatus based on a one-way transmission, a device and a system. The transmitting terminal performs the error-correction anti-loss encoding on the to-be-transmitted message to obtain the code word corresponding to the to-be-transmitted message. The encryption key negotiated with the receiving terminal is adopted to encrypt the code word and the ciphertext message corresponding to the code word is obtained. Further, the ciphertext message is encoded onto the quantum state, and the obtained quantum state information is transmitted to the receiving terminal through the quantum channel.
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公开(公告)号：US12093785B2
公开(公告)日：2024-09-17
申请号：US17098248
申请日：2020-11-13
发明人： Harald Esko Jakob Putterman , Kyungjoo Noh , Christopher Chamberland , Amir Safavi-Naeini , Oskar Jon Painter , Patricio Arrangoiz Arriola
IPC分类号： G06N10/40 , G06N10/70 , H10N60/12 , G06F30/3308
CPC分类号： G06N10/40 , G06N10/70 , H10N60/12 , G06F30/3308
摘要： High-fidelity measurements of qubits are achieved by increasing a number of measurements taken by use of a swap operation and a readout qubit, deflating a bosonic qubit for which measurement outcomes are affected by single photon/phonon loss events, deflating a bosonic qubit enabling readout in other basis, and evolving the qubit under a Hamiltonian that couples a mode to be measured to another mode where the Hamiltonian is selected from a three wave mixing interaction, and/or a combination of these techniques.
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公开(公告)号：US20240303522A1
公开(公告)日：2024-09-12
申请号：US18273753
申请日：2022-01-25
申请人： Psiquantum, Corp.
发明人： Andrew Doherty , Mercedes Gimeno-Segovia , Daniel Litinski , Naomi Nickerson , Mihir Pant , Terence Rudolph , Christopher Sparrow
摘要： Circuits are provided that create entanglement among qubits having Gottesman-Kitaev-Preskill (GKP) encoding using photonic systems and structures. For example, networks of beam splitters and homodyne measurement circuits can be used to perform projective entangling measurements on GKP qubits from different quantum systems. In some embodiments. GKP qubits can be used to implement quantum computations using fusion-based quantum computing or other fault-tolerant quantum computing approaches.
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公开(公告)号：US12073287B2
公开(公告)日：2024-08-27
申请号：US16687469
申请日：2019-11-18
发明人： Poulami Das , Nicolas Guillaume Delfosse , Christopher Anand Pattison , Srilatha Manne , Douglas Carmean , Krysta Marie Svore , Helmut Gottfried Katzgraber
IPC分类号： G06N10/00 , G06F9/30 , G06F9/38 , G06F9/50 , G06F18/2323 , G06N10/40 , G06N10/60 , G06N10/70 , G06N10/80 , H03M13/00 , H03M13/15
CPC分类号： G06N10/00 , G06F9/30098 , G06F9/30145 , G06F9/382 , G06F9/3861 , G06F9/3869 , G06F9/5016 , G06F18/2323 , G06N10/40 , G06N10/60 , G06N10/70 , G06N10/80 , H03M13/1575 , H03M13/611
摘要： A quantum computing device comprises at least one quantum register including l logical qubits, where l is a positive integer. The quantum computing device further includes a set of d decoder blocks coupled to the at least one quantum register, where d
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7.发明公开公开(公告)号：US20240256939A1
公开(公告)日：2024-08-01
申请号：US18487585
申请日：2023-10-16
发明人： Angus Kan , Brendan Pankovich
IPC分类号： G06N10/70
CPC分类号： G06N10/70
摘要： Methods and systems are provided for performing an encoded n-qubit GHZ measurement on n encoded (logical) qubits using encoded Bell state measurements (E-BSMs). Each E-BSM comprises a plurality of dual-rail Bell state measurements (DR-BSMs) performed on pairs of dual-rail encoded photonic qubits (DR-qubits). Methods and systems for using encoded n-qubit GHZ measurements for fault-tolerant measurement-based quantum computation are also provided.
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公开(公告)号：US12026586B2
公开(公告)日：2024-07-02
申请号：US17531652
申请日：2021-11-19
发明人： Alexey Vyacheslavovich Gorshkov , Adam Micah Kaufman , Jeremy Thomas Young , Przemyslaw D. Bienias , Ron Belyansky
摘要： Preparing a metrologically-relevant entangled state includes: providing a plurality of atoms in a regular lattice, wherein each atom is in an initial quantum state of a first state in a ground state manifold; initializing a central atom in the regular lattice to a (|0+|1)/√2 state while all other atoms remain in the first state |0 as remaining atoms; and proceeding, starting with the central atom, to propagate preparation of Greenberger-Horne-Zeilinger (GHZ) states in a nonlinear progression by increasing a number of GHZ states in each iteration through the remaining atoms in a recursive manner, to produce an intermediate GHZ state, such that the intermediate GHZ state acts as an initial GHZ state for a next iteration, until a final GHZ state is formed to prepare the metrologically-relevant entangled state of the atoms.
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公开(公告)号：US20240169240A1
公开(公告)日：2024-05-23
申请号：US18108550
申请日：2023-02-10
申请人： Psiquantum, Corp.
发明人： Daniel Litinski
摘要： A fault-tolerant quantum computer using topological codes such as surface codes can have an architecture that reduces the amount of idle volume generated. The architecture can include qubit modules that generate surface code patches for different qubits and a network of interconnections between different qubit modules. The interconnections can include “port” connections that selectably enable coupling of boundaries of surface code patches generated in different qubit modules and/or “quickswap” connections that selectably enable transferring the state of a surface code patch from one qubit module to another. Port and/or quickswap connections can be made between a subset of qubit modules. For instance port connections can connect a given qubit module to other qubit modules within a fixed range. Quickswap connections can provide a log-tree network of direct connections between qubit modules.
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公开(公告)号：US20240169233A1
公开(公告)日：2024-05-23
申请号：US18177422
申请日：2023-03-02
发明人： Dawei DING , Jianxin CHEN , Jiachen Huang
摘要： Systems and methods are disclosed for benchmarking a set of quantum gates using a universal randomized benchmarking (URB) framework. This framework supports benchmarking of gate sets that lack a group structure, enabling new benchmarking schemes beyond group-based and other existing schemes. Benchmarking a set of quantum gates according to the URB framework can include selecting a probability distribution, an implementation map, and a measurement map based on the set of quantum gates. When the probability distribution, implementation map, and measurement map possess certain properties, the probability of correctly measuring a final state, as a function of the length of a sequence of gates applied to the quantum system, can approximate an exponential decay. This exponential decay can be used to determine a benchmark average fidelity for the set of quantum gates.
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