US 12,373,721 B2
Controlled photon Fock state generation using arbitrarily weak photonic nonlinearities
Aashish Clerk, Chicago, IL (US); and Andrew Lingenfelter, Chicago, IL (US)
Assigned to The University of Chicago, Chicago, IL (US)
Filed by The University of Chicago, Chicago, IL (US)
Filed on Jan. 30, 2023, as Appl. No. 18/161,569.
Claims priority of provisional application 63/312,461, filed on Feb. 22, 2022.
Prior Publication US 2023/0267361 A1, Aug. 24, 2023
Int. Cl. G06N 10/40 (2022.01)
CPC G06N 10/40 (2022.01) 20 Claims
OG exemplary drawing
 
1. A method for generating a non-classical photonic Fock state in a resonant electromagnetic mode of a nonlinear electromagnetic resonator, comprising:
adjusting and applying a first electromagnetic drive in a first time period to displace the resonant electromagnetic mode from a lab frame into a displaced frame;
adjusting and applying the first electromagnetic drive and a second electromagnetic drive in a second time period subsequent to the first time period to the nonlinear electromagnetic resonator to generate a photonic Fock state of the resonant electromagnetic mode in the displaced frame with photon number n by turning off a matrix element between photonic Fock states with photon numbers n and n+1, thereby creating a photon blockade between the photonic Fock states with photon numbers n and n+1; and
adjusting and applying the first electromagnetic drive in a third time period subsequent to the second time period to restore the resonant electromagnetic mode into the lab frame from the displaced frame while maintaining the photonic Fock state.