Adaptive basis selection for encoded fusion measurements
AssigneePsiquantum, Corp.
InventorsMihir Pant, Naomi Nickerson, Hector Bombin Palomo
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Abstract
A quantum computing system and methods for performing fusion based quantum computing on encoded qubits. A fusion controller sequentially performs a series of fusion measurements on respective photonic quantum modes of first and second encoded qubits to obtain a respective series of classical measurement results. 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. An encoded fusion measurement result is determined based on the classical measurement results, and the encoded fusion measurement result is stored in a memory medium.
Claims20
A photonic quantum computing system, comprising:
- a non-transitory computer-readable memory medium;
- a first encoded qubit comprising a first plurality of photonic quantum modes;
- a second encoded qubit comprising a second plurality of photonic quantum modes;
- a fusion controller;
- and
- a plurality of fusion sites coupled to the fusion controller, wherein the photonic quantum computing system is configured to:
- perform a first fusion measurement at a first fusion site of the plurality of fusion sites on a first photonic quantum mode of the first plurality of photonic quantum modes and a second photonic quantum mode of the second plurality of photonic quantum modes;
- obtain a first classical measurement result of the first fusion measurement;
- select a basis for performing a second fusion measurement based at least in part on the first classical measurement result;
- perform the second fusion measurement at a second fusion site of the plurality of fusion sites on a third photonic quantum mode of the first plurality of photonic quantum modes and a fourth photonic quantum mode of the second plurality of photonic quantum modes according to the selected basis;
- obtain a second classical measurement result of the second fusion measurement;
- determine an encoded fusion measurement result of a fusion of the first encoded qubit and the second encoded qubit based at least in part on the first and second classical measurement results;
- and
- store the encoded fusion measurement result in a non-transitory memory medium.
A method, comprising:
- performing a first fusion measurement on a first photonic quantum mode of a first encoded qubit and a second photonic quantum mode of a second encoded qubit, wherein the first and second photonic quantum modes comprise dual-rail encoded photonic qubits;
- 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 of the first encoded qubit and a fourth photonic quantum mode of the second encoded qubit according to the selected basis;
- obtaining a second classical measurement result of the second fusion measurement;
- determining an encoded fusion measurement result of a fusion of the first encoded qubit and the second encoded qubit based at least in part on the first and second classical measurement results;
- and
- storing the encoded fusion measurement result 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:
- perform a first fusion measurement on a first photonic quantum mode of a first encoded qubit and a second photonic quantum mode of a second encoded qubit;
- obtain a first classical measurement result of the first fusion measurement;
- select a first basis for performing a second fusion measurement based at least in part on the first classical measurement result;
- perform the second fusion measurement on a third photonic quantum mode of the second encoded qubit and a fourth photonic quantum mode of a third encoded qubit according to the first basis;
- obtain a second classical measurement result of the second fusion measurement;
- select a second basis for performing a third fusion measurement based at least in part on the first and second classical measurement results;
- perform the third fusion measurement on a fifth photonic quantum mode of the third encoded qubit and a sixth photonic quantum mode of the first encoded qubit according to the second basis;
- obtain a third classical measurement result of the third fusion measurement;
- determine an encoded fusion measurement result of a fusion of the first, second and third encoded qubits based at least in part on the first, second and third classical measurement results;
- and
- store the encoded fusion measurement result in the non-transitory computer-readable memory medium.
Dependencies are inferred from the claim text.