2006
DOI: 10.1103/physrevb.74.035432
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Aharonov-Bohm phase operations on a double-barrier nanoring charge qubit

Abstract: We present a scheme for charge qubit implementation in a double-barrier nanoring. The logical states of the qubit are encoded in the spatial wavefunctions of the two lowest energy states of the system. The Aharonov-Bohm phase introduced by magnetic flux, instead of tunable tunnelings, along with electric fields can be used for implementing the quantum gate operations. During the operations, the external fields should be switched smoothly enough to avoid the errors caused by the transition to higher-lying state… Show more

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Cited by 5 publications
(4 citation statements)
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“…[20][21][22][23][24] They are also playgrounds for studying physics in quasi-one-dimensional systems. 25 Our results are also important for technological and scientific applications in which insulating materials are irradiated with highly energetic charged particles. For example, proton beams are used in the treatment of human cells, insulating materials are used as protective layers in fusion and fission reactors, and semiconductors are routinely used for detecting particles in highenergy physics.…”
mentioning
confidence: 76%
“…[20][21][22][23][24] They are also playgrounds for studying physics in quasi-one-dimensional systems. 25 Our results are also important for technological and scientific applications in which insulating materials are irradiated with highly energetic charged particles. For example, proton beams are used in the treatment of human cells, insulating materials are used as protective layers in fusion and fission reactors, and semiconductors are routinely used for detecting particles in highenergy physics.…”
mentioning
confidence: 76%
“…The charges of these arcs are proportional to their lengths, that is proportional to distances r 1 and r 2 . Since the electrostatic force between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them, then the quotient dF 1 /dF 2 is equal to (r 1 r 2 2 )/(r 2 r 2 1 ) = r 2 /r 1 < 1. Thus, the net force dF 2 − dF 1 is not equal to zero.…”
Section: The Filamentary Ringmentioning
confidence: 99%
“…The model of a filamentary ring has also practical significance. For example, it is successfully used in the physics of store qubits for quantum computing [2], atomic force microscopy [3], and astrophysics [4].…”
Section: Introductionmentioning
confidence: 99%
“…2 There have also been proposals to use charged rings to physically store qubits for quantum computing. 3 These and other examples underscore the relevance of understanding electrostatics measurements at the nanoscale with the AFM.…”
Section: Introductionmentioning
confidence: 96%