公开(公告)号：US20230058207A1

公开(公告)日：2023-02-23

申请号：US17743850

申请日：2022-05-13

申请人： University of Maryland, College Park ,  Government of the United States of America, as Represented by the Secretary of Commerce

发明人： Seyed Alireza SEIF TABRIZI ,  Mohammad HAFEZI ,  Yi-Kai LIU

IPC分类号： G06N10/70

摘要： A method for detecting a two-qubit correlated dephasing error includes accessing a signal of a quantum system, where the quantum system includes a plurality of qubits. Every qubit has a nonzero rate of dephasing and some qubits have a nonzero rate of correlated dephasing. The signal further includes information about a matrix that includes diagonal elements and off-diagonal elements. The off-diagonal elements of the matrix are 2 s-sparse. The method further includes performing randomized measurements of the off-diagonal elements of the matrix and recovering the matrix based on a direct measurement of the diagonal elements of the matrix.

公开(公告)号：US20220137484A1

公开(公告)日：2022-05-05

申请号：US17515757

申请日：2021-11-01

申请人： University of Maryland, College Park

发明人： Sunil MITTAL ,  Mohammad HAFEZI

IPC分类号： G02F1/35 ,  H04B10/50

摘要： Examples of the present disclosure include the use of a topological system including an array of coupled ring resonators that exhibits topological edge states to generate frequency combs and temporal dissipative Kerr solitons. The topological edge states constitute a travelling-wave super-ring resonator causing generation of at least coherent nested optical frequency combs, and self-formation of nested temporal solitons that are robust against defects in the array at a mode efficiency exceeding 50%.

公开(公告)号：US20220075237A1

公开(公告)日：2022-03-10

申请号：US17326971

申请日：2021-05-21

申请人： University of Maryland, College Park

发明人： Sunil MITTAL ,  Mohammad HAFEZI ,  Venkata Vikram ORRE

IPC分类号： G02F1/35 ,  G02F1/365

摘要： A topological photonic system configured as a robust source of indistinguishable photons pairs with tunable spectral correlations. The system includes a two-dimensional silicon-photonic ring resonator array configured to implement an anomalous-quantum Hall model that exhibits topologically robust edge states. Linear dispersion of the edge states ensures efficient and robust phase matching and tunability of the spectral bandwidth of photon pairs generated via spontaneous four-wave mixing. Spectral tunability is manifested in the temporal correlations in the Hong-Ou-Mandel interference between photons. The generated photon pairs are energy-time entangled.