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Exponentially Localized Magnetic Fields for Single-Spin Quantum Logic Gates | | Daniel A. Lidar
; Joseph H. Thywissen
; | | Date: |
15 Oct 2003 | | Journal: | Journal of Applied Physics 96, 754 (2004) | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall quant-ph | | Affiliation: | University of Toronto | | Abstract: | An infinite array of parallel current-carrying wires is known, from the field of neutral particle optics, to produce an exponentially localized magnetic field when the current direction is antiparallel in adjacent wires. We show that a finite array of several tens of superconducting Nb nanowires can produce a peak magnetic field of 10mT that decays by a factor of 10^4 over a length scale of 500nm. Such an array is readily manufacturable with current technology, and is compatible with both semiconductor and superconducting quantum computer architectures. A series of such arrays can be used to individually address single single-spin or flux qubits spaced as little as 100nm apart, and can lead to quantum logic gate times of 5ns. | | Source: | arXiv, cond-mat/0310352 | | Services: | Forum | Review | PDF | Favorites | |
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