US 12,271,785 B2
Fault-tolerant cluster state quantum computation
Kianna Wan, Redwood City, CA (US); Soonwon Choi, Brookline, MA (US); Isaac H. Kim, Davis, CA (US); Noah John Shutty, Stanford, CA (US); and Patrick Hayden, Palo Alto, CA (US)
Assigned to The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US); and The Regents of the University of California, Oakland, CA (US)
Appl. No. 18/035,817
Filed by The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US); and The Regents of the University of California, Oakland, CA (US)
PCT Filed Nov. 9, 2021, PCT No. PCT/US2021/058677
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/099215, PCT Pub. Date May 12, 2022.
Claims priority of provisional application 63/111,427, filed on Nov. 9, 2020.
Prior Publication US 2023/0419157 A1, Dec. 28, 2023
Int. Cl. G06N 10/70 (2022.01); G06N 10/40 (2022.01)
CPC G06N 10/70 (2022.01) [G06N 10/40 (2022.01)] 25 Claims
OG exemplary drawing
 
1. A device for fault-tolerant quantum computation comprising:
(a) a quantum emitter implementing a control qubit;
(b) a first router coupled to the quantum emitter;
(c) a second router coupled to the quantum emitter;
(d) a first delay line coupled to the first router and the second router,
(e) a second delay line coupled to the first router and the second router; and
(f) a detector coupled to the first router;
wherein the first delay line, the second delay line, the first router, the second router, and the quantum emitter are configured to form two loops to support propagating modes implementing data qubits that passively interact multiple times with the control qubit to generate three-dimensional cluster states; wherein the quantum emitter implementing the control qubit is configured to generate the propagating modes implementing the data qubits; wherein the first router and the second router are configured such that a propagating photon or phonon travels through each of the first delay line and second delay line a predetermined number of times before being measured by the detector; wherein the detector is configured to measure the data qubits after multiple interactions with the control qubit.