Charge detection enables free-electron quantum computation

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dc.creatorBeenakker, C. W. J.
dc.creatorDiVincenzo, D. P.
dc.creatorEmary, C.
dc.creatorKindermann, M.
dc.date2004-01-12
dc.date.accessioned2026-07-07T06:08:47Z
dc.date.available2026-07-07T06:08:47Z
dc.descriptionIt is known that a quantum computer operating on electron-spin qubits with single-electron Hamiltonians and assisted by single-spin measurements can be simulated efficiently on a classical computer. We show that the exponential speed-up of quantum algorithms is restored if single-charge measurements are added. These enable the construction of a CNOT (controlled NOT) gate for free fermions, using only beam splitters and spin rotations. The gate is nearly deterministic if the charge detector counts the number of electrons in a mode, and fully deterministic if it only measures the parity of that number.
dc.description5 pages including 3 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0401066
dc.identifierhttp://arxiv.org/abs/quant-ph/0401066
dc.identifierPhys.Rev.Lett. 93, 020501 (2004)
dc.identifierdoi:10.1103/PhysRevLett.93.020501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91750
dc.subjectQuantum Physics
dc.subjectCondensed Matter
dc.titleCharge detection enables free-electron quantum computation
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