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US 2023/0274177 A1Published application
Method for generation of random quantum states and verification of quantum devices
AssigneesCalifornia Institute of Technology, Massachusetts Institute of Technology, The Regents of the University of California
InventorsManuel Endres, Adam L. Shaw, Soonwon Choi, Daniel K. Mark, Joonhee Choi
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Abstract
Systems and methods for generating random quantum states or benchmarking quantum machines.
Claims20
A system for generating a pseudo random quantum state, comprising:
- a quantum device comprising a plurality of coherently interacting quantum systems having a plurality of quantum degrees of freedom, wherein the quantum systems are prepared with a fidelity in a well characterized quantum state for the multiple quantum degrees of freedom;
- a signal source for applying one or more signals that quantum mechanically evolve the quantum state under the influence of couplings and interactions between the quantum systems and/or between the quantum systems and a source of decoherence;
- and
- a detection system for performing a measurement on a subset of the quantum systems resulting in a second quantum state of the unmeasured quantum systems, wherein the second quantum state is used as a source of pseudo random quantum states.
1 more element
A computer implemented method to verify a quantum device, comprising:
- obtaining a quantum device comprising one or more quantum systems each having a quantum state for multiple quantum degrees of freedom;
- and
- verifying at least one of a coupling strength between the quantum systems and/or between a source of decoherence and the quantum systems, or
- a fidelity of the quantum state;
- and
- wherein the verifying comprises comparing measurement samples of an evolved quantum state of the quantum systems, against expected behavior with time evolution obtained using a classical computer, to estimate at least one of the fidelity or the coupling strength.
3 more elements
A computer implemented system for verifying a quantum device, comprising:
- a computer coupled to or more quantum systems each having a quantum state for multiple quantum degrees of freedom, wherein:
- the computer comprises one or more processors;
- one or more memories;
- and an application stored in the one or more memories, and
- the application executed by the one or more processors verifies at least one of:
- a coupling strength between the quantum systems and/or between a source of decoherence and the quantum systems, or
- a fidelity of the quantum state of interest,
- by comparing measurement samples of an evolved quantum state of the quantum systems, against expected behavior with time evolution determined by the computer, to estimate at least one of the fidelity or the coupling strength.
5 more elements
Dependencies are inferred from the claim text.