Adaptive basis selection for fusion measurements
AssigneePsiquantum, Corp.
InventorMihir Pant
Life of this patent
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Abstract
A quantum computing system and methods for performing fault-tolerant quantum computing. A fusion controller sequentially performs a series of fusion measurements on different fusion sites of a plurality of fusion sites to obtain a respective series of classical measurement results. The series of fusion measurements is performed on quantum modes of a logical qubit. For respective fusion measurements of the series of fusion measurements, a basis for performing the respective fusion measurement is selected based on classical measurement results of previous fusion measurements. The series of classical measurement results are in the memory medium.
Claims20
A system, comprising:
- a non-transitory computer-readable memory medium;
- a fusion controller;
- and
- a plurality of fusion sites coupled to the fusion controller, wherein the system is adapted to:
- sequentially perform, by the fusion controller, a series of fusion measurements on quantum modes at different fusion sites of the plurality of fusion sites to obtain a respective series of classical measurement results, wherein the quantum modes comprise photons, wherein the plurality of fusion sites comprise respective photonic waveguide structures, and wherein the series of fusion measurements comprises two-qubit projective entanglement measurements of respective pairs of quantum modes, wherein sequentially performing the series of fusion measurement comprises:
- for at least one fusion measurement of the series of fusion measurements, selecting a basis for performing the fusion measurement based on classical measurement results of previous fusion measurements;
- receive, by the fusion controller, the series of classical measurement results;
- and
- store the series of classical measurement results in the memory medium.
A method comprising:
- performing a first fusion measurement on a first photonic quantum mode and a second photonic quantum mode at a first fusion site, wherein the first fusion measurement comprises a two-qubit projective entanglement measurement of the first and second photonic quantum modes;
- obtaining a first classical measurement result of the first fusion measurement;
- selecting a basis for performing a second fusion measurement based at least in part on the first classical measurement result;
- performing the second fusion measurement on a third photonic quantum mode and a fourth photonic quantum mode at a second fusion site according to the selected basis, wherein the second fusion measurement comprises a two-qubit projective entanglement measurement of the third and fourth photonic quantum modes, wherein the first and second fusion sites comprise respective photonic waveguide structures;
- and
- obtaining a second classical measurement result of the second fusion measurement;
- and
- storing the first and second classical measurement results in a non-transitory memory medium.
A non-transitory computer-readable memory medium storing program instructions which, when executed by a processor, cause a fusion controller to:
- sequentially perform a series of fusion measurements on different fusion sites of a plurality of fusion sites to obtain a respective series of classical measurement results, wherein the fusion sites comprise photonic waveguide structures, wherein the series of fusion measurements comprises two-qubit projective entanglement measurements of respective pairs of photonic quantum modes of a logical qubit, wherein, for respective fusion measurements of the series of fusion measurements, the program instructions are further executable to cause the fusion controller to:
- select a basis for performing the respective fusion measurement based on classical measurement results of one or more previous fusion measurements;
- and
- store the series of classical measurement results in the memory medium.
Dependencies are inferred from the claim text.