公开(公告)号：US12126387B2

公开(公告)日：2024-10-22

申请号：US18014052

申请日：2020-07-02

申请人： LG ELECTRONICS INC.

发明人： JaYeong Kim ,  Byungkyu Ahn ,  Sangrim Lee ,  Hojae Lee

IPC分类号： H04B10/70 ,  H04B10/077 ,  H04L9/08

CPC分类号： H04B10/70 ,  H04B10/077 ,  H04L9/0852

摘要： Provided are a device and a method performed by the device to correct an error in a quantum communication system. The method is characterized by comprising: transmitting a random access (RA) preamble to another device; receiving a random access response (RAR) from the other device as a response to the RA preamble; performing a radio resource control (RRC) connection procedure with the other device; and transmitting data to the other device, wherein the data is encoded on the basis of key information, the error is measured on the basis of a test pulse, and the key information is distributed to the device and the other device on the basis of the error being corrected using an improved Faraday rotator mirror of the device.

公开(公告)号：US20240345318A1

公开(公告)日：2024-10-17

申请号：US18502263

申请日：2023-11-06

申请人： Quantum Network Technologies, Inc.

发明人： Dirk Robert ENGLUND ,  Brendan John SHIELDS

IPC分类号： G02B6/122 ,  B82Y10/00 ,  H04B10/70

CPC分类号： G02B6/1228 ,  B82Y10/00 ,  H04B10/70

摘要： A method for interacting with quantum states over respective time intervals comprises: providing, from at least one optical fiber interface, a fiber-coupled optical mode that controls optical coupling to and/or from an optical fiber, where at least a portion of the optical fiber extends outside of an interior of a housing comprising the at least one optical fiber interface; providing a quantum state from each quantum state emission element (QSEE) housed on or inside the housing; providing, from each of multiple portions of one or more directional structures, a preferential direction for an associated element-coupled optical mode that controls optical coupling to and from a different respective subset of one or more of the QSEEs; and scanning a scanning structure housed on or inside the housing to change an overlap between the fiber-coupled optical mode and a different respective one of the element-coupled optical modes over each time interval.

公开(公告)号：US20240340090A1

公开(公告)日：2024-10-10

申请号：US18296513

申请日：2023-04-06

申请人： General Dynamics Mission Systems, Inc.

发明人： Todd Hodges ,  Glen Uehara ,  Jacob Glasby

IPC分类号： H04B10/70 ,  H04B10/29 ,  H04J14/02

CPC分类号： H04B10/70 ,  H04B10/29 ,  H04J14/02

摘要： The quantum relay and quantum signal source exploit quantum properties of photon streams. A pair of spatially separated and polarization-entangled photon streams is used. The pair collectively exist in a quantum superposition state by virtue of their mutual entanglement. In the relay, an encoder establishes a modulation control signal corresponding to the information to be conveyed. An optical quantum circuit is placed in the path of one of the pair of streams, so that the first stream passes through it. The optical quantum circuit alters the quantum polarization state of the photon passing through it based on the control signal. In this way information is encoded into quantum probability distributions of the superposition state through quantum parallelism and quantum interference, whereby information is conveyed in the photon streams. In the signal source a second information source is used to modulate the other of the pair of streams, thus enhancing the information density of the system, by encoding both in the probability distribution and in the correlation of the photon arrival times.

公开(公告)号：US12113581B2

公开(公告)日：2024-10-08

申请号：US18102395

申请日：2023-01-27

申请人： Lightmatter, Inc.

发明人： Darius Bunandar ,  Nicholas C. Harris ,  Carl Ramey

IPC分类号： H04B10/00 ,  G02F1/21 ,  H04B10/548 ,  H04B10/70 ,  H04B10/80 ,  H04J14/02 ,  G06T1/20

CPC分类号： H04B10/70 ,  G02F1/21 ,  H04B10/548 ,  H04B10/801 ,  H04J14/02 ,  G02F1/212 ,  G02F2203/48 ,  G02F2203/50 ,  G06T1/20

摘要： Aspects relate to a photonic processing system, a photonic processor, and a method of performing matrix-vector multiplication. An optical encoder may encode an input vector into a first plurality of optical signals. A photonic processor may receive the first plurality of optical signals; perform a plurality of operations on the first plurality of optical signals, the plurality of operations implementing a matrix multiplication of the input vector by a matrix; and output a second plurality of optical signals representing an output vector. An optical receiver may detect the second plurality of optical signals and output an electrical digital representation of the output vector.

公开(公告)号：US12107635B2

公开(公告)日：2024-10-01

申请号：US17949405

申请日：2022-09-21

申请人： AT&T Intellectual Property I, L.P.

发明人： Moshiur Rahman

IPC分类号： H04L9/08 ,  H04B10/70

CPC分类号： H04B10/70 ,  H04L9/0855 ,  G02B2207/114

摘要： Aspects of the subject disclosure may include, for example, identifying a request to facilitate communications between first and second processing nodes, determining that the communications are to be established via quantum teleportation between, and identifying a network path comprising a first path segment to obtain a quantum channel, wherein quantum entanglement is established between the first and second processing nodes based on transportation of a first quantum entangled object via the quantum channel. A classical communication channel is facilitated between the first and second processing nodes, adapted to exchange between the nodes, quantum state information of a measurement performed upon the first quantum entangled object. Information is exchanged between the first and second processing nodes via the quantum channel according to the transported first quantum entangled object and the exchanged quantum state information. Other embodiments are disclosed.

公开(公告)号：US20240322916A1

公开(公告)日：2024-09-26

申请号：US18290885

申请日：2022-07-15

申请人： MARBEUF CONSEIL ET RECHERCHE

发明人： Bruno SANGLE-FERRIERE

IPC分类号： H04B10/70

CPC分类号： H04B10/70

摘要： The invention relates to a quantum communication system (1), which comprises: ⋅ an entangled photon transmitter (2) comprising a source which is configured to generate at least one pair of entangled photons comprising a first photon (P1) emitted on a first propagation path (D1) and a second photon (P2) emitted on a second propagation path (D2); ⋅ a first receiver (3) which is arranged on the first propagation path (D1) and comprises a first instrument (35), which is arranged to absorb the first photon in one of two complementary polarisations, and an optical selector (30), which is configured either to allow the first photon to pass towards said first measuring instrument (35) or to prevent it from being measured; and ⋅ a second receiver (4) which is arranged on the second propagation path (D2) and comprises an optical amplifier (40), which makes it possible to demultiply the second photon while maintaining its polarisation, and a measuring instrument (45), which makes it possible to measure the average quantum state of the demultiplied photons (P20).

公开(公告)号：US20240313865A1

公开(公告)日：2024-09-19

申请号：US18677448

申请日：2024-05-29

申请人： University of Maryland, College Park

发明人： Kristin M. BECK ,  Marko Cetina ,  Michael Lurie Goldman

IPC分类号： H04B10/70 ,  H04B10/114

CPC分类号： H04B10/70 ,  H04B10/114

摘要： Aspects of the present disclosure describe techniques for controlling coherent crosstalk errors that occur in multi-channel acousto-optic modulators (AOMs) by applying cancellation tones to reduce or eliminate the crosstalk errors. For example, methods and systems are described that include calculating initial radio frequency (RF) tones to be applied to multiple channels of the AOM; calculating, in response to an application of the initial RF tones, compensation RF tones to be added to the initial RF tones to at least partially correct for undesired crosstalk effects; and in response to the application of the initial RF tones and the compensation RF tones, calculating subsequent compensation RF tones to be added to the initial RF tones until the crosstalk effect in each of the multiple channels is below a threshold level.

公开(公告)号：US12088347B2

公开(公告)日：2024-09-10

申请号：US17726630

申请日：2022-04-22

申请人： Bank of America Corporation

发明人： Venugopal Kailasa ,  Laxma Gavinolla ,  Durga Prasad Kutthumolu ,  Ramprasath S

IPC分类号： H04B10/11 ,  G06N5/025 ,  H04B10/03 ,  H04B10/079 ,  H04B10/50 ,  H04B10/80 ,  G06F11/34 ,  G06N20/00 ,  H04B10/07 ,  H04B10/116 ,  H04B10/70

CPC分类号： H04B10/502 ,  G06N5/025 ,  H04B10/03 ,  H04B10/0793 ,  H04B10/808 ,  G06F11/3476 ,  G06N20/00 ,  H04B10/07 ,  H04B10/11 ,  H04B10/116 ,  H04B10/70 ,  H04B10/806

摘要： Data server and client device logs may be transmitted over a network for analysis to identify potential issues such as errors. Because the logs may include significant amounts of data, the logs may be transmitted through a quantum smart grid network that leverages Li-Fi technology for increased bandwidth and improved latency. Data servers in a data center may transmit their logs to an aggregation point or node through an internal Li-Fi network. These logs may then be transmitted over the smart grid network which may carry both power and data communications.

公开(公告)号：US12068431B2

公开(公告)日：2024-08-20

申请号：US17486701

申请日：2021-09-27

申请人： ROHM CO., LTD.

发明人： Fumiya Nagasawa ,  Hiroshi Sekiguchi ,  Yoshinori Miyamae ,  Koji Taniuchi

IPC分类号： H01L33/06 ,  H01L33/10 ,  H01S5/343 ,  B82Y20/00 ,  H04B10/70

CPC分类号： H01L33/06 ,  H01L33/105 ,  H01S5/343 ,  B82Y20/00 ,  H04B10/70

摘要： A single-photon source includes a substrate of a wide-bandgap semiconductor provided with a light-emission region including only one target point detect, a cover mask arranged on a main surface of the substrate and having an opening to which the light-emission region in the substrate is exposed, and an excitation system configured to shift an electron in a defect-ground state to an excited state at the point defect in the light-emission region. A single photon released from the point defect in the light-emission region when the electron in the excited state is shifted to the ground state is output through the opening in the cover mask.

公开(公告)号：US20240275493A1

公开(公告)日：2024-08-15

申请号：US18437706

申请日：2024-02-09

申请人： UT-Battelle, LLC

发明人： Brian P. Williams

IPC分类号： H04B10/63 ,  H04B10/70 ,  H04L9/08

CPC分类号： H04B10/63 ,  H04B10/70 ,  H04L9/0852

摘要： A receiver configured to remove a bias of a homodyne detector is provided. The receiver produces at least one clone local oscillator (LO) pulse per LO pulse for the reference pulse and per LO pulse for the data-carrying pulse. Measurement made using clone LO pulses are used to compensate for the bias in reference measurements and data-carrying measurements. Clone LO pulses are produced when the reference pulses and the data-carrying pulses are not expected to be present at the homodyne detector. The bias corrected reference measurements may be used as feedback to maintain a timing synchronization of the LO for the reference pulse and the LO for the data-carrying pulse with the corresponding reference pulse and the data-carrying pulse, respectively and for polarization correction. The receiver may be incorporated into a continuous variable (CV) quantum key distribution (QKD) system.