公开(公告)号：US20230206105A1

公开(公告)日：2023-06-29

申请号：US18074112

申请日：2022-12-02

Applicant: California Institute of Technology

Inventor： Maria Spiropulu ,  Lautaro Narváez ,  Venkata Ramana Raju Valivarthi

IPC: G06N10/40 ,  H04B10/70 ,  G01N21/65

CPC classification number: G06N10/40 ,  H04B10/70 ,  G01N21/65

Abstract: A synchronization system for synchronizing photons in a quantum teleportation network. The synchronization system includes a multiplexer combining a clock pulse with a signal photon (carrying a qubit) in an optical fiber, the optical fiber connecting a transmitter node (including the multiplexer) and a receiver node (comprising a demultiplexer). The signal photons have signal wavelengths red shifted as compared to clock wavelengths of the clock pulses. The clock pulses have an intensity below a threshold, such that Raman scattering of the clock pulses by the fiber (shifting the clock wavelengths into the signal wavelengths) is negligible. The receiver node comprises a demultiplexer demultiplexing the one of the signal photons and the one of the clock pulses; a first detector detecting the one of the signal photons; and a second detector detecting the one of the clock pulses.

公开(公告)号：US20240275494A1

公开(公告)日：2024-08-15

申请号：US18073245

申请日：2022-12-01

Applicant: California Institute of Technology

Inventor： Maria Spiropulu ,  Venkata Ramana Raju Valivarthi

IPC: H04B10/70 ,  H04B10/079 ,  H04L7/00

CPC classification number: H04B10/70 ,  H04B10/0795 ,  H04L7/0075

Abstract: 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.

公开(公告)号：US20250165827A1

公开(公告)日：2025-05-22

申请号：US18629732

申请日：2024-04-08

Applicant: California Institute of Technology

Inventor： Baris Volkan Gurses ,  Samantha I. Davis ,  Maria Spiropulu ,  Seyed Ali Hajimiri

IPC: G06N10/20

Abstract: Quantum Phased Array(s) of emitters and receivers that generate, modulate, emit, receive, and detect any quantum field. Quantum phased arrays include particle source(s) sourcing any quantum field, transmit modulator element(s) modulating any quantum observable and the associated quantum field, emitting elements radiating one or more quantum fields spatiotemporally, a propagation medium with one or more modulator elements for complete control of the quantum field, receiver(s) receiving one or more quantum fields, receive modulator element(s) modulating any quantum observable and the associated quantum field, detector(s) resolving one or more received quantum fields. Quantum metrology, communication and computing systems including quantum phased arrays are detailed for leveraging quantum field engineering functionality (complete control of one or more wavefunctions of one or more particles in any one or more orthonormal bases) of quantum phased arrays for quantum metrology, communication and computing applications.