US 12,457,043 B2
Optical apparatus for quantum computing, system, method and storage medium
Michal Vyvlečka, Shenzhen (CN); Philip Walther, Shenzhen (CN); and Elisabeth Lerchbaumer, Shenzhen (CN)
Assigned to TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed by Tencent Technology (Shenzhen) Company Limited, Shenzhen (CN)
Filed on May 8, 2023, as Appl. No. 18/144,508.
Application 18/144,508 is a continuation of application No. PCT/CN2022/120888, filed on Sep. 23, 2022.
Claims priority of application No. 202111258194.1 (CN), filed on Oct. 27, 2021; and application No. 202111272875.3 (CN), filed on Oct. 29, 2021.
Prior Publication US 2023/0318716 A1, Oct. 5, 2023
Int. Cl. G06F 21/00 (2013.01); G06N 10/70 (2022.01); H04B 10/70 (2013.01)
CPC H04B 10/70 (2013.01) [G06N 10/70 (2022.01)] 15 Claims
OG exemplary drawing
 
1. An optical apparatus for quantum computing, comprising: a delay generation module, an optical fiber collimation module, a quasi-spatial mode generation module and a feedforward measurement module, the feedforward measurement module comprising an active optical element configured to modulate optical signals: wherein:
the delay generation module is configured to generate different time delays for n photons respectively, so that the n photons arrive at the active optical element at different times respectively, n being an integer greater than 1;
the optical fiber collimation module is configured to convert light rays of the n photons into n collimated light rays to propagate in a free space;
the quasi-spatial mode generation module is configured to control the light rays of the n photons propagating in the free space to pass through the same active optical element in sequence, and the active optical element being configured to modulate optical signals of the n photons in sequence according to a time sequence in which the n photons arrive at the active optical element; and
the feedforward measurement module is configured to perform polarimetry on a modulated optical signal of a first photon to obtain a measurement result of the first photon, the measurement result of the first photon being used for performing feedforward compensation or feedforward error correction on a measurement result of a second photon to be measured: the first photon being one of the n photons, and the second photon being a next photon to be measured of the first photon.