Patents by Inventor Bing Qi

Bing Qi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240381032
    Abstract: A double gap double coil driven speaker includes a diaphragm, a permanent magnet having a magnetization, and a magnetic flux conducting device having a magnetic flux conducting path. The magnetic flux conducting device and the permanent magnet together form a magnetic flux loop, wherein the magnetic flux loop has two gaps, and directions of magnetic fields generated in the two gaps are opposite to each other. The speaker further includes a voice coil having two coils wound on an outer surface of the voice coil and the voice coil having one end connected to the diaphragm, wherein the two coils are respectively accommodated in the two gaps. When the two coils conduct currents, the voice coil is displaced to push the diaphragm, wherein, relative to a common cross section of the two gaps, the currents respectively flowing through the two coils are in opposite directions.
    Type: Application
    Filed: May 8, 2023
    Publication date: November 14, 2024
    Applicant: JULUEN ENTERPRISE CO., LTD.
    Inventors: Ching-Hui HUANG, Bing-Qi CHEN, Sze-Yi CHEN, Po-Chang WU
  • Publication number: 20240318874
    Abstract: The present invention aims to provide an application of an ammonium ion-containing halogen compound in solid-state refrigeration and a novel efficient solid-state refrigeration method driven by a pressure. The ammonium ion-containing halogen compound is characterized in that phase change can be induced with only a small pressure, resulting in a huge barocaloric effect, and the unit pressure thereof drives the phase-change temperature displacement as high as 0.81 Kmin?1. Ammonium iodide produces 89.07 J kg?1K?1 isothermal entropy change under a pressure of 20 MPa; and the use of this material for a refrigeration cycle is far superior to other material systems having a barocaloric effect.
    Type: Application
    Filed: July 12, 2022
    Publication date: September 26, 2024
    Inventors: Bing LI, Ji QI, Zhidong ZHANG
  • Patent number: 12099238
    Abstract: A device for realizing the splicing of an array fiber and a large-size quartz end cap comprises a carbon dioxide laser, a light splitter, a light beam shaper, a high reflectivity mirror, an image detection module, an array fiber and a carrier thereof, a large-size quartz end cap and a carrier thereof, a stepping motor, a thermodetector, and a computer; a laser beam emitted by the carbon dioxide laser is divided into two light beams through a light splitter, after the two light beams respectively pass through the beam shaper and the high reflectivity mirror, two strip-shaped light spots with uniform power density are integrally formed to heat a splicing face of the large-size quartz end cap, a uniform temperature field of a target splicing area is achieved through indirect heating and heat conduction.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: September 24, 2024
    Assignee: Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
    Inventors: Haibo Zhang, Menghao Wu, Bing He, Yu Lei, Jun Zhou, Yunfeng Qi, Zhijun Yuan, Ren Ye
  • Publication number: 20240305665
    Abstract: An endpoint receives a photon signal jointly encoded in time and frequency as a time-frequency state, and separates the photon signal with a dispersive element to generate frequency components. The endpoint delays each corresponding frequency component by a corresponding time delay to separate out the frequency components in time before the endpoint recombines the frequency components to generate a frequency-separated signal. The endpoint measures the frequency-separated signal to determine the time-frequency state of the photon signal.
    Type: Application
    Filed: March 9, 2023
    Publication date: September 12, 2024
    Inventor: Bing Qi
  • Publication number: 20240291641
    Abstract: A network element in a quantum network receives a hybrid frame including a classical header and a quantum payload. The network element processes the classical header for a length of time and generates a new classical header. The network element drops a portion of the quantum payload based on the length of time spent processing the classical header and updates the hybrid frame to include the new classical header and the quantum payload without the dropped portion.
    Type: Application
    Filed: February 28, 2023
    Publication date: August 29, 2024
    Inventors: Stephen Magno DiAdamo, Alireza Shabani, Bing Qi, Reem M. Mandil
  • Patent number: 12069168
    Abstract: A passive continuous variable quantum key distribution scheme, where Alice splits the output of a thermal source into two beams, measures one locally and transmits the other mode to Bob after applying attenuation. A secure key can be established based on measurements of the two beams without the use of a random number generator or an optical modulator.
    Type: Grant
    Filed: February 21, 2022
    Date of Patent: August 20, 2024
    Assignee: UT-Battelle, LLC
    Inventors: Bing Qi, Philip G. Evans, Warren P. Grice
  • Patent number: 12040840
    Abstract: A first endpoint in a Quantum Key Distribution (QKD) system determines an operating mode for a hybrid transceiver for communicating in an optical communication session with a second endpoint. The operating mode is selected from a group containing a classical reception mode, a classical transmission mode, a quantum transmission mode, and a quantum reception mode. The first endpoint configures an input to a homodyne detector of the hybrid transceiver based on the operating mode and operates the hybrid transceiver in the operating mode for at least a portion of the optical communication session.
    Type: Grant
    Filed: August 26, 2022
    Date of Patent: July 16, 2024
    Assignee: CISCO TECHNOLOGY, INC.
    Inventor: Bing Qi
  • Patent number: 12010225
    Abstract: A system and a receiver for generating quantum key(s) using conjugated homodyne detection is provided. The receiver may communicate with a transmitter via an insecure quantum channel and a classical channel to generate the quantum key(s). A decoder, in the receiver, may determine, based at least in part on quadratures X, P measured by conjugated homodyne detectors, a raw-key signal corresponding to a key signal generated by the transmitter, and a distribution of photon numbers corresponding to a quantum signal received via the insecure quantum channel. Information about the key signal is exchanged between the receiver and the transmitter via the classical channel and used to determine a quantum bit error rate of the determined raw-key signal. A gain is also obtained. A secure-key rate is calculated based at least in part on the gain, the quantum bit error rate, and the photon number distribution.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: June 11, 2024
    Assignee: UT-BATTELLE, LLC
    Inventor: Bing Qi
  • Publication number: 20240147101
    Abstract: A network element receives a classical header for a quantum payload, and processes the classical header to determine a destination endpoint for the quantum payload. The network element generates a new classical header for the quantum payload based on the destination endpoint. The network element sends the new classical header to a next hop ahead of the quantum payload at a time based on a number of hops between the network element and the destination endpoint.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 2, 2024
    Inventors: Alireza Shabani, Bing Qi, Stephen Magno DiAdamo, Glen W. Miller, Ramana Rao Venkata Renuka Kompella
  • Publication number: 20240072907
    Abstract: A first endpoint in a Quantum Key Distribution (QKD) system determines an operating mode for a hybrid transceiver for communicating in an optical communication session with a second endpoint. The operating mode is selected from a group containing a classical reception mode, a classical transmission mode, a quantum transmission mode, and a quantum reception mode. The first endpoint configures an input to a homodyne detector of the hybrid transceiver based on the operating mode and operates the hybrid transceiver in the operating mode for at least a portion of the optical communication session.
    Type: Application
    Filed: August 26, 2022
    Publication date: February 29, 2024
    Inventor: Bing Qi
  • Publication number: 20220303130
    Abstract: A system and a receiver for generating quantum key(s) using conjugated homodyne detection is provided. The receiver may communicate with a transmitter via an insecure quantum channel and a classical channel to generate the quantum key(s). A decoder, in the receiver, may determine, based at least in part on quadratures X, P measured by conjugated homodyne detectors, a raw-key signal corresponding to a key signal generated by the transmitter, and a distribution of photon numbers corresponding to a quantum signal received via the insecure quantum channel. Information about the key signal is exchanged between the receiver and the transmitter via the classical channel and used to determine a quantum bit error rate of the determined raw-key signal. A gain is also obtained. A secure-key rate is calculated based at least in part on the gain, the quantum bit error rate, and the photon number distribution.
    Type: Application
    Filed: March 21, 2022
    Publication date: September 22, 2022
    Inventor: Bing Qi
  • Patent number: 11411724
    Abstract: Continuous variable quantum secret sharing (CV-QSS) technologies are described that use laser sources and homodyne detectors. Here, a Gaussian-modulated coherent state (GMCS) prepared by one device passes through secure stations of other devices sequentially on its way to a trusted device, and each of the other devices coherently adds a locally prepared, independent GMCS to the group of propagating GMCSs. Finally, the trusted device measures both the amplitude and the phase quadratures of the received group of coherent GMCSs using double homodyne detectors. The trusted device suitably uses the measurement results to establish a secure key for encoding secret messages to be broadcast to the other devices. The devices cooperatively estimate, based on signals corresponding to their respective Gaussian modulations, the trusted device's secure key, so that the cooperative devices can decode the broadcast secret messages with the secure key.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: August 9, 2022
    Assignee: UT-Battelle, LLC
    Inventors: Warren P. Grice, Bing Qi
  • Publication number: 20220216988
    Abstract: A passive continuous variable quantum key distribution scheme, where Alice splits the output of a thermal source into two beams, measures one locally and transmits the other mode to Bob after applying attenuation. A secure key can be established based on measurements of the two beams without the use of a random number generator or an optical modulator.
    Type: Application
    Filed: February 21, 2022
    Publication date: July 7, 2022
    Inventors: Bing Qi, Philip G. Evans, Warren P. Grice
  • Patent number: 11258594
    Abstract: A passive continuous-variable quantum key distribution scheme, where Alice splits the output of a thermal source into two spatial modes, measures one locally and transmits the other mode to Bob after applying attenuation. A secure key can be established based on measurements of the two modes without the use of a random number generator or an optical modulator.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: February 22, 2022
    Assignee: UT-Battelle, LLC
    Inventors: Bing Qi, Philip G. Evans, Warren P. Grice
  • Patent number: 10944553
    Abstract: An improved coherent communication scheme is provided. The coherent communication scheme encodes both classical and quantum information simultaneously using isolated groups of states: classical information is represented by different groups and can be decoded deterministically; and quantum information is represented by highly overlapped states within the same group, thus guaranteeing security. Decoding includes projecting the detection results at the receiver to one of the distinguishable encoding groups first, which allows the classical information to be read out, and then generating a quantum key from the residual randomness. This communications scheme enables simultaneous classical communication and QKD over the same communication channel using the same transmitter and receiver, opening the door to operate QKD in the background of classical communication and at negligible costs.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: March 9, 2021
    Assignee: UT-Battelle, LLC
    Inventor: Bing Qi
  • Publication number: 20210036846
    Abstract: Continuous variable quantum secret sharing (CV-QSS) technologies are described that use laser sources and homodyne detectors. Here, a Gaussian-modulated coherent state (GMCS) prepared by one device passes through secure stations of other devices sequentially on its way to a trusted device, and each of the other devices coherently adds a locally prepared, independent GMCS to the group of propagating GMCSs. Finally, the trusted device measures both the amplitude and the phase quadratures of the received group of coherent GMCSs using double homodyne detectors. The trusted device suitably uses the measurement results to establish a secure key for encoding secret messages to be broadcast to the other devices. The devices cooperatively estimate, based on signals corresponding to their respective Gaussian modulations, the trusted device's secure key, so that the cooperative devices can decode the broadcast secret messages with the secure key.
    Type: Application
    Filed: July 31, 2020
    Publication date: February 4, 2021
    Inventors: Warren P. Grice, Bing Qi
  • Publication number: 20200162248
    Abstract: A passive continuous-variable quantum key distribution scheme, where Alice splits the output of a thermal source into two spatial modes, measures one locally and transmits the other mode to Bob after applying attenuation. A secure key can be established based on measurements of the two modes without the use of a random number generator or an optical modulator.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 21, 2020
    Inventors: Bing Qi, Philip G. Evans, Warren P. Grice
  • Patent number: 10635403
    Abstract: A system and method are provided to yield a QRNG based on homodyne detection of quantum noise (e.g., vacuum noise measured as shot noise) generated from a local oscillator, such as an LED. In one embodiment, a QRNG may be provided that is adjustable based on a control input to produce a random output that can be translated to one or more random data bits.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: April 28, 2020
    Assignee: UT-Battelle, LLC
    Inventors: Raphael C. Pooser, Benjamin J. Lawrie, Bing Qi, Brian P. Williams
  • Publication number: 20200125332
    Abstract: A system and method are provided to yield a QRNG based on homodyne detection of quantum noise (e.g., vacuum noise measured as shot noise) generated from a local oscillator, such as an LED. In one embodiment, a QRNG may be provided that is adjustable based on a control input to produce a random output that can be translated to one or more random data bits.
    Type: Application
    Filed: September 26, 2018
    Publication date: April 23, 2020
    Inventors: Raphael C. Pooser, Benjamin J. Lawrie, Bing Qi, Brian P. Williams
  • Patent number: 10585645
    Abstract: A system and method according to one embodiment are provided for random number generation based on measuring quadrature fluctuations of a single mode thermal state using an optical homodyne detector.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: March 10, 2020
    Assignee: UT-Battelle, LLC
    Inventor: Bing Qi