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US 9,517,931 B2Granted
Measurement-only topological quantum computation
AssigneeMicrosoft Technology Licensing, LLC
InventorsMichael Freedman, Chetan Nayak, Parsa Bonderson
Life of this patent
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Abstract
Measurement-only topological quantum computation using both projective and interferometrical measurement of topological charge is described. Various issues that would arise when realizing it in fractional quantum Hall systems are discussed.
Claims21
A quantum computer, comprising:
- an array of computational anyons;
- an array of entanglement anyons situated so that at least one entanglement anyon is situated between each adjacent pair of computational anyons;
- a fractional quantum Hall (FQH) fluid;
- and
- a plurality of contacts coupled to the FQH fluid so as define at least one interferometer formed in an edge of the FQH fluid for measuring a current associated with coupling of a selected computational anyon to at least one associated entanglement anyon or a coupling of adjacent entanglement anyons, wherein a quantum computation is defined at least in part by the current measurement.
2 more elements
A quantum computer, comprising:
- a fractional quantum Hall (FQH) fluid;
- an array of computational anyons;
- an array of entanglement anyons situated so that at least one entanglement anyon is situated between each adjacent pair of computational anyons;
- and
- a plurality of contacts coupled to the FQH fluid so as define at least:
- a first interferometer situated to measure a current associated with a first quantum state based on a coupling of a first computational anyon and at least a first entanglement anyon situated adjacent the first computational anyon;
- a second interferometer formed in an edge of the FQH fluid situated to measure a current associated with a coupling of adjacent entanglement anyons;
- and
- a third interferometer situated to measure a current associated with a second quantum state associated with the FQH fluid based on a coupling of a second computational anyon and at least a second entanglement anyon situated adjacent the second computational anyon.
6 more elements
A quantum computing method for performing anyonic quantum computation, the method comprising:
- performing a sequence of edge-current measurements in an interferometer, the sequence of edge-current measurements defining a braiding transformation, each said edge-current measurement being associated with one or more probe anyons defined by a fractional quantum Hall (FQH) effect fluid, wherein the probe anyons are associated with at least one edge current of the fractional quantum Hall effect fluid.
Dependencies are inferred from the claim text.