US 12,443,874 B2
Quantum entanglement distribution service
Mihir Keshav Bhaskar, Cambridge, MA (US); Bartholomeus Johannes Machielse, Somerville, MA (US); David Sarkis Levonian, Cambridge, MA (US); Antia Lamas Linares, Austin, TX (US); and Oskar Jon Painter, Sierra Madre, CA (US)
Assigned to IONQ INC., College Park, MD (US)
Filed by IONQ INC., College Park, MD (US)
Filed on Dec. 10, 2021, as Appl. No. 17/548,418.
Prior Publication US 2023/0188548 A1, Jun. 15, 2023
Int. Cl. G06N 10/80 (2022.01); G06N 10/60 (2022.01); H04L 9/08 (2006.01)
CPC G06N 10/80 (2022.01) [G06N 10/60 (2022.01); H04L 9/0855 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system comprising:
a quantum device included in a service provider network, the quantum device configured to receive or generate photons in a superposition state;
a network interface configured to connect the quantum device of the service provider network, via one or more of a plurality of network links, to one or more of a plurality of intermediate nodes;
the plurality of intermediate nodes, wherein:
respective ones of the intermediate nodes are configured to generate a photon in a superposition state or receive a photon in a superposition state; and
the plurality of intermediate nodes comprises a quantum repeater, wherein the quantum repeater comprises quantum memories, and is configured to:
issue, via a quantum non-destruction measuring device of the quantum repeater, a first heralding signal that announces a reception of a first photon in a superposition state to a first one of the quantum memories that enables a first qubit;
issue, via the quantum non-destruction measuring device, a second heralding signal that announces a reception of a second photon in a superposition state to a second one of the quantum memories that enables a second qubit; and
responsive to the issuance of the second heralding signal, cause joint measurements to be performed to extend quantum entanglement, wherein:
the joint measurements determine a correlation relationship between the first and second photons via a measurement of how the first photon changed when combined with the first qubit and how the second photon changed when combined with the second qubit; and
the joint measurements are performed without collapsing the superposition states of the first and second photons or the first and second qubits; and
one or more computing devices of the service provider network configured to implement a quantum entanglement distribution service configured to:
receive, from a customer, a request for distribution of quantum entanglement to an endpoint of the customer;
determine a path comprising one or more of the plurality of network links and one or more of the plurality of intermediate nodes, wherein the determined one or more network links and the determined one or more intermediate nodes form a network path between the quantum device of the service provider network and the endpoint of the customer; and
cause quantum entanglement to be distributed from the quantum device of the service provider network to the endpoint of the customer, via the network interface and the determined one or more network links and the determined one or more intermediate nodes.