Techniques for facilitation the storage and retrieval of the qubits in a hot atomic vapor system are described herein. The techniques comprising, transmitting a first control pulse having a bandwidth that is based on a bandwidth of the optical qubit to modify transmission properties of the atomic vapor system: receiving the optical qubit at the atomic vapor system; transmitting a second control pulse having properties based on a target bandwidth for a retrieved optical qubit to modify transmission properties of the atomic vapor system; and isolating the retrieved optical qubit from the control laser.
B82Y 10/00 - Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
B82Y 20/00 - Nanooptics, e.g. quantum optics or photonic crystals
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G02F 1/39 - Non-linear optics for parametric generation or amplification of light, infrared, or ultraviolet waves
G04F 5/14 - Apparatus for producing preselected time intervals for use as timing standards using atomic clocks
G06N 10/40 - Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control
2.
A SYSTEM AND METHOD FOR DETECTING CORRELATIONS BETWEEN TWO PHOTONS
Techniques for reducing the number of detectors required to perform the measurements associated with quantum entanglement and quantum communication using optical qubits are described herein. The techniques comprise using delay lines between beam splitting optical elements to delay the arrival of photons at a detector such that a shared detector can be used to detect multiple photons for a correlation measurement with the detections occurring at different times. Thereby reducing the hardware requirements for the detectors by half and substantially reducing the cost and complexity of systems to detect and process qubits.
Provided herein are systems and methods for implementing a field-deployable quantum memory. The quantum memory device includes a device housing configured to be rack-mounted and a quantum memory module disposed within the device housing and configured to perform a memory operation including storing an input qubit and retrieving the stored qubit for output. The quantum memory device may also include a filter module disposed within the device housing and configured to filter an output of the quantum memory module.
THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK (USA)
QUNNECT, INC. (USA)
Inventor
Figueroa, Eden
Namazi, Mehdi
Flament, Mael
Gera, Sonali
Abstract
Quantum network devices, systems, and methods are provided to enable long-distance transmission of quantum bits (qubits) for applications such as Quantum Key Distribution (QKD), entanglement distribution, and other quantum communication applications. Such systems and methods provide for separately storing first, second, third, and fourth photons, wherein the first and second photons and the third and fourth photons are respective first and second entangled photon pairs, triggering a synchronized retrieval of the stored first, second, third, and fourth photons such that the first photon is propagated to a first node, the second and third photons are propagated to a second node, and the fourth photon is propagated to a third node, and creating a new entangled pair comprising the first and fourth photons at the first and third nodes to transmit quantum information.
G01B 9/02017 - Interferometers characterised by the beam path configuration with multiple interactions between the target object and light beams, e.g. beam reflections occurring from different locations
The inventors have developed methods and systems to address the above challenges using entangled photons with multiple colors transmitted with a classical data stream as a technique to detect eavesdropping on the data stream and to prevent reverse engineering for demodulating the entangled bits from the data stream. In some embodiments, a time gate is used to interleave the quantum and classic signals to provide quantum encryption of fiber optic communication protocols.
Techniques for reducing the number of detectors required to perform the measurements associated with quantum entanglement and quantum communication using optical qubits are described herein. The techniques comprise using delay lines between beam splitting optical elements to delay the arrival of photons at a detector such that a shared detector can be used to detect multiple photons for a correlation measurement with the detections occurring at different times. Thereby reducing the hardware requirements for the detectors by half and substantially reducing the cost and complexity of systems to detect and process qubits.
Systems and methods for generating entangled photon pairs comprising two photons having different wavelengths are provided. The techniques include pumping an atomic vapor of an alkali atomic species with a pump laser and a coupling laser that are configured to drive a spontaneous four-wave mixing process within the atomic vapor. The pump laser and the coupling laser are detuned by large detunings relative to atomic transitions of the alkali atomic species, increasing brightness of the entangled pair photon source.
G06N 10/40 - Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
B82Y 10/00 - Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
B82Y 20/00 - Nanooptics, e.g. quantum optics or photonic crystals
G02F 1/21 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference
Techniques for facilitation the storage and retrieval of the qubits in a hot atomic vapor system are described herein. The techniques comprising, transmitting a first control pulse having a bandwidth that is based on a bandwidth of the optical qubit to modify transmission properties of the atomic vapor system; receiving the optical qubit at the atomic vapor system; transmitting a second control pulse having properties based on a target bandwidth for a retrieved optical qubit to modify transmission properties of the atomic vapor system; and isolating the retrieved optical qubit from the control laser.
Provided herein are systems and methods for implementing a field-deployable quantum memory. The quantum memory device includes a device housing configured to be rack- mounted and a quantum memory module disposed within the device housing and configured to perform a memory operation including storing an input qubit and retrieving the stored qubit for output. The quantum memory device may also include a filter module disposed within the device housing and configured to filter an output of the quantum memory module.
Systems and methods for generating an entangled pair of bichromatic photons are described. The system includes an atomic vapor cell containing atoms of an atomic species located within beam paths of a first and second laser beam. The first and second laser beams are tuned to first and second wavelengths that are resonant with first and second atomic transitions of the atomic species such that the first and second laser beams cause a four-wave mixing process within the atomic vapor cell. As a result of the four-wave mixing process, entangled photon pairs having a third and fourth wavelength are generated and output from the atomic vapor cell. The first and second wavelengths may be selected to create electromagnetically-induced transparency (EIT) within the atomic vapor cell, the EIT creating a transparent medium within the atomic vapor cell at the third wavelength, improving spectral brightness and/or photon linewidths.
A quantum memory device and methods for storage and retrieval of a qubit from the quantum memory device are described. The quantum memory device includes a first optical component to convert an input qubit encoded in an arbitrary polarization state of a photon into a spatial qubit propagating in a pair of parallel optical rails, an atomic vapor memory to store the spatial qubit in an atomic vapor, and a second optical component to combine the spatial qubit, when retrieved from the atomic vapor memory, into an output qubit encoded in an arbitrary polarization state of a photon.
G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
B82Y 10/00 - Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
The Research Foundation for The State University of New York (USA)
Qunnect, Inc. (USA)
Inventor
Figueroa, Eden
Namazi, Mehdi
Flament, Mael
Gera, Sonali
Abstract
Quantum network devices, systems, and methods are provided to enable long-distance transmission of quantum bits (qubits) for applications such as Quantum Key Distribution (QKD), entanglement distribution, and other quantum communication applications. Such systems and methods provide for separately storing first, second, third, and fourth photons, wherein the first and second photons and the third and fourth photons are respective first and second entangled photon pairs, triggering a synchronized retrieval of the stored first, second, third, and fourth photons such that the first photon is propagated to a first node, the second and third photons are propagated to a second node, and the fourth photon is propagated to a third node, and creating a new entangled pair comprising the first and fourth photons at the first and third nodes to transmit quantum information.
G01B 9/02017 - Interferometers characterised by the beam path configuration with multiple interactions between the target object and light beams, e.g. beam reflections occurring from different locations
Systems and methods for performing polarization compensation in optical fiber-based quantum telecommunications systems are provided. The system includes a polarization modulator optically coupled to a photon source by an optical fiber and at least one controller coupled to the polarization modulator. The at least one controller is configured to determine, using a machine learning model and/or a lookup table, a feedback parameter based on one or more measurements of a polarization of probe photons at a location along the optical fiber, the probe photons being generated by the photon source; and using the feedback parameter, to change a setting of the polarization modulator to change a polarization of quantum data photons propagating in the optical fiber subsequent to the probe photons.
G06N 10/40 - Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
H04B 10/079 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
H04B 10/2507 - Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
An optical system including an optical cavity and a method of tuning an optical cavity using a machine learning model is provided. The method includes determining a tuning parameter of the optical cavity by: analyzing, using a convolutional neural network (CNN) model, a measurement signal obtained from the optical cavity to determine a degree of misalignment of the optical cavity; and determining, using a reinforcement learning (RL) model, the tuning parameter based on the degree of misalignment of the optical cavity.
A quantum memory device and methods for storage and retrieval of a qubit from the quantum memory device are described. The quantum memory device includes a first optical component to convert an input qubit encoded in an arbitrary polarization state of a photon into a spatial qubit propagating in a pair of parallel optical rails, an atomic vapor memory to store the spatial qubit in an atomic vapor, and a second optical component to combine the spatial qubit, when retrieved from the atomic vapor memory, into an output qubit encoded in an arbitrary polarization state of a photon.
G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
A quantum memory device and methods for storage and retrieval of a qubit from the quantum memory device are described. The quantum memory device includes a first optical component to convert an input qubit encoded in an arbitrary polarization state of a photon into a spatial qubit propagating in a pair of parallel optical rails, an atomic vapor memory to store the spatial qubit in an atomic vapor, and a second optical component to combine the spatial qubit, when retrieved from the atomic vapor memory, into an output qubit encoded in an arbitrary polarization state of a photon.
B82Y 10/00 - Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
G06N 10/00 - Quantum computing, i.e. information processing based on quantum-mechanical phenomena
Systems and methods for generating an entangled pair of bichromatic photons are described. The system includes an atomic vapor cell containing atoms of an atomic species located within beam paths of a first and second laser beam. The first and second laser beams are tuned to first and second wavelengths that are resonant with first and second atomic transitions of the atomic species such that the first and second laser beams cause a four-wave mixing process within the atomic vapor cell. As a result of the four-wave mixing process, entangled photon pairs having a third and fourth wavelength are generated and output from the atomic vapor cell. The first and second wavelengths may be selected to create electromagnetically-induced transparency (BIT) within the atomic vapor cell, the BIT creating a transparent medium within the atomic vapor cell at the third wavelength, improving spectral brightness and/or photon linewidths.
Systems and methods for generating an entangled pair of bichromatic photons are described. The system includes an atomic vapor cell containing atoms of an atomic species located within beam paths of a first and second laser beam. The first and second laser beams are tuned to first and second wavelengths that are resonant with first and second atomic transitions of the atomic species such that the first and second laser beams cause a four-wave mixing process within the atomic vapor cell. As a result of the four-wave mixing process, entangled photon pairs having a third and fourth wavelength are generated and output from the atomic vapor cell. The first and second wavelengths may be selected to create electromagnetically-induced transparency (BIT) within the atomic vapor cell, the BIT creating a transparent medium within the atomic vapor cell at the third wavelength, improving spectral brightness and/or photon linewidths.
Systems and methods for performing polarization compensation in optical fiber-based quantum telecommunications systems are provided. The system includes a polarization modulator optically coupled to a photon source by an optical fiber and at least one controller coupled to the polarization modulator. The at least one controller is configured to determine, using a machine learning model and/or a lookup table, a feedback parameter based on one or more measurements of a polarization of probe photons at a location along the optical fiber, the probe photons being generated by the photon source; and using the feedback parameter, to change a setting of the polarization modulator to change a polarization of quantum data photons propagating in the optical fiber subsequent to the probe photons.
Systems and methods for performing polarization compensation in optical fiber-based quantum telecommunications systems are provided. The system includes a polarization modulator optically coupled to a photon source by an optical fiber and at least one controller coupled to the polarization modulator. The at least one controller is configured to determine, using a machine learning model and/or a lookup table, a feedback parameter based on one or more measurements of a polarization of probe photons at a location along the optical fiber, the probe photons being generated by the photon source; and using the feedback parameter, to change a setting of the polarization modulator to change a polarization of quantum data photons propagating in the optical fiber subsequent to the probe photons.
An optical system including an optical cavity and a method of tuning an optical cavity using a machine learning model is provided. The method includes determining a tuning parameter of the optical cavity by: analyzing, using a convolutional neural network (CNN) model, a measurement signal obtained from the optical cavity to determine a degree of misalignment of the optical cavity; and determining, using a reinforcement learning (RL) model, the tuning parameter based on the degree of misalignment of the optical cavity.
An optical system including an optical cavity and a method of tuning an optical cavity using a machine learning model is provided. The method includes determining a tuning parameter of the optical cavity by: analyzing, using a convolutional neural network (CNN) model, a measurement signal obtained from the optical cavity to determine a degree of misalignment of the optical cavity; and determining, using a reinforcement learning (RL) model, the tuning parameter based on the degree of misalignment of the optical cavity.
Quantum network devices, systems, and methods are provided to enable long-distance transmission of quantum bits (qubits) for applications such as Quantum Key Distribution (QKD), entanglement distribution, and other quantum communication applications. Such systems and methods provide for separately storing first, second, third, and fourth photons, wherein the first and second photons and the third and fourth photons are respective first and second entangled photon pairs, triggering a synchronized retrieval of the stored first, second, third, and fourth photons such that the first photon is propagated to a first node, the second and third photons are propagated to a second node, and the fourth photon is propagated to a third node, and creating a new entangled pair comprising the first and fourth photons at the first and third nodes to transmit quantum information.
G01B 9/02017 - Interferometers characterised by the beam path configuration with multiple interactions between the target object and light beams, e.g. beam reflections occurring from different locations
THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK (USA)
QUNNECT, INC. (USA)
Inventor
Figueroa, Eden
Namazi, Mehdi
Flament, Mael
Gera, Sonali
Abstract
Quantum network devices, systems, and methods are provided to enable long-distance transmission of quantum bits (qubits) for applications such as Quantum Key Distribution (QKD), entanglement distribution, and other quantum communication applications. Such systems and methods provide for separately storing first, second, third, and fourth photons, wherein the first and second photons and the third and fourth photons are respective first and second entangled photon pairs, triggering a synchronized retrieval of the stored first, second, third, and fourth photons such that the first photon is propagated to a first node, the second and third photons are propagated to a second node, and the fourth photon is propagated to a third node, and creating a new entangled pair comprising the first and fourth photons at the first and third nodes to transmit quantum information.
H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
