Patent SG-11201803790Q-A (SG)
Title: In-situ quantum error correction
Inventor: KELLY JULIAN SHAW
IPC: G06N99/00
Filed: 2015-11-06
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 11 May 2017 (11.05.2017) WIPOIPCT (10) International Publication Number WO 2017/078734 A1 (51) International Patent Classification: G06N 99/00 (2010.01) (21) International Application Number: PCT/US2015/059481 (22) International Filing Date: (25) Filing Language: (26) Publication Language: 6 November 2015 (06.11.2015) English English (71) Applicant: GOOGLE INC. [US/US]; 1600 Amphitheatre Parkway, Mountain View, California 94043 (US). (72) Inventor; and (71) Applicant: KELLY, Julian Shaw [US/US]; Google Inc., 1600 Amphitheatre Parkway, Mountain View, California 94043 (US). (74) Agent: FRANZ, Paul E.; Fish & Richardson P.C., P.O. Box 1022, Minneapolis, Minnesota 55440-1020 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (54) Title: IN-SITU QUANTUM ERROR CORRECTION 104 106 108 110 112 114 116 118 120 130 102 ^+E2^, + nSn + 4a + 'Tr,+ 124 •t m i> oo i> o o CJ O & 122 ' FIG. 1A \ 100 (57) : Methods, systems, and apparatus for parallel optimization of continuously running quantum error correction by closed-loop feedback. In one aspect, a method includes continuously and effectively optimizing qubit performance in-situ whilst an error correction operation on the quantum system is running. The method directly monitors the output from error detection and provides this information as feedback to calibrate the quantum gates associated with the quantum system. In some implementations, the physical qubits are spatially partitioned into one or more independent hardware patterns, where the errors attributable to each hardware pattern are non-overlapping. The one or more different sets of hardware patterns are then temporarily interleaved such that all physical qubits and operations are optimized. The method allows for the optimization of each section of a hardware pattern to be performed individually and in parallel, and can result is O(l) scaling.