The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2022
Filed:
Jul. 23, 2020
California Institute of Technology, Pasadena, CA (US);
Andrei Faraon, La Canada Flintridge, CA (US);
Jonathan M. Kindem, Boulder, CO (US);
Andrei Ruskuc, Pasadena, CA (US);
John G. Bartholomew, Glebe, AU;
Jake Rochman, Pasadena, CA (US);
CALIFORNIA INSTITUTE OF TECHNOLOGY, Pasadena, CA (US);
Abstract
Systems and methods for providing optical quantum communication networks based on rare-earth ion quantum bits (qubits) entrapped in solids are presented. According to one aspect a qubit is provided by anYbion doped into a YVO crystal structure. A nanophotonic cavity fabricated in the doped crystal structure provides a zero-field energy level structure of the ion with optical transitions between ground and excited states at a wavelength longer than 980 nm. A subspace of the qubit is provided by two lower energy levels at the ground states separated by a microwave frequency of about 675 MHz. Addressing of the optical transitions is via first and second lasers and addressing of microwave transitions at the ground and excited states are via respective microwave sources. A single-shot readout sequence of the qubit based on two consecutive readout sequences on the optical transitions separated by a microwave pumping of the ground states is presented. Assignment of a readout state is conditionally based on combined states detected in the two consecutive readout sequences.