US 11,677,402 B2
Parametrically activated quantum logic gates
Eyob A. Sete, Walnut Creek, CA (US); Nicolas Didier, Berkeley, CA (US); Marcus Palmer da Silva, Lafayette, CA (US); Chad Tyler Rigetti, Walnut Creek, CA (US); Matthew J. Reagor, Corte Madera, CA (US); Shane Arthur Caldwell, Oakland, CA (US); Nikolas Anton Tezak, Oakland, CA (US); Colm Andrew Ryan, Albany, CA (US); Sabrina Sae Byul Hong, Oakland, CA (US); Prasahnt Sivarajah, Emeryville, CA (US); Alexander Papageorge, San Francisco, CA (US); and Deanna Margo Abrams, Oakland, CA (US)
Assigned to Rigetti & Co, LLC, Berkeley, CA (US)
Filed by Rigetti & Co, LLC, Berkeley, CA (US)
Filed on Aug. 24, 2021, as Appl. No. 17/410,042.
Application 17/410,042 is a continuation of application No. 16/663,809, filed on Oct. 25, 2019, granted, now 11,108,398.
Application 16/663,809 is a continuation of application No. 16/012,551, filed on Jun. 19, 2018, granted, now 10,483,980, issued on Nov. 19, 2019.
Claims priority of provisional application 62/666,545, filed on May 3, 2018.
Claims priority of provisional application 62/637,855, filed on Mar. 2, 2018.
Claims priority of provisional application 62/573,446, filed on Oct. 17, 2017.
Claims priority of provisional application 62/521,943, filed on Jun. 19, 2017.
Prior Publication US 2022/0231690 A1, Jul. 21, 2022
Int. Cl. G06N 10/00 (2022.01); H03K 19/195 (2006.01)
CPC H03K 19/195 (2013.01) [G06N 10/00 (2019.01)] 23 Claims
OG exemplary drawing
 
1. A quantum information control method comprising:
generating a control signal configured to modulate, at a modulation frequency, a transition frequency of a tunable qubit device in a quantum processor, the modulation frequency being determined based on a transition frequency of a fixed-frequency qubit device in the quantum processor, the transition frequency of the fixed-frequency qubit device being independent of a magnetic flux experienced by the fixed-frequency qubit device; and
applying a two-qubit quantum logic gate to a pair of qubits in the quantum processor by communicating the control signal to a control line coupled to the tunable qubit device, the pair of qubits comprising a first qubit defined by the fixed-frequency qubit device and a second qubit defined by the tunable qubit device,
wherein applying the two-qubit quantum logic gate to the pair of qubits comprises one of the following:
applying an iSWAP gate to the pair of qubits;
applying a square-root-of-iSWAP gate to the pair of qubits;
applying a controlled-Z gate to the pair of qubits; or
applying a Bell-Rabi gate to the pair of qubits.