US 12,437,219 B2
Systems and methods for efficient photonic heralded quantum computing systems
Duncan L. MacFarlane, Dallas, TX (US); Mitchell A. Thornton, Dallas, TX (US); and William V. Oxford, Austin, TX (US)
Assigned to ANAMETRIC, INC., Austin, TX (US)
Filed by Anametric, Inc., Austin, TX (US)
Filed on Sep. 7, 2021, as Appl. No. 17/468,358.
Claims priority of provisional application 63/075,369, filed on Sep. 8, 2020.
Prior Publication US 2022/0076155 A1, Mar. 10, 2022
Int. Cl. G06N 10/00 (2022.01)
CPC G06N 10/00 (2019.01) 20 Claims
OG exemplary drawing
 
1. A quantum system, comprising:
a photon pair source adapted to produce an entangled photon pair comprising a signal photon and a herald photon, the photon pair source comprising a first output and a second output, the photon pair source adapted to produce the signal photon on the first output or the second output and to produce the herald photon on the first output of the photon pair source or the second output of the photon pair source;
a first filter coupled to the first output of the photon pair source, the first filter having a first signal output and a first herald output and adapted to differentiate the herald photon from the signal photon to route the herald photon to the first herald output and the signal photon to the first signal output;
a second filter coupled to the second output of the photon pair source, the second filter having a second signal output and a second herald output and adapted to differentiate the herald photon from the signal photon to route the herald photon to the second herald output and the signal photon to the second signal output;
a first quantum circuitry block having a first input coupled to the first signal output of the first filter and adapted to process the signal photon or the herald photon without decohering the photon pair when the signal photon or the herald photon is provided to the first quantum circuitry block; and
a second quantum circuitry block coupled to the second signal output of the second filter and adapted to process the signal photon or the herald photon without decohering the photon pair when the signal photon or the herald photon is provided to the second quantum circuitry block.