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APS » Journals » Phys. Rev. A » Volume 71 » Issue 6
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Phys. Rev. A 71, 060307(R) (2005) [4 pages]

Decoherence suppression for oscillator-assisted geometric quantum gates via symmetrization

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Li-Xiang Cen1 and Paolo Zanardi1,2
1Institute for Scientific Interchange Foundation, Viale Settimio Severo 65, I-10133 Torino, Italy
2Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

Received 12 October 2004; published 23 June 2005

We propose a symmetrization procedure to beat decoherence for oscillator-assisted quantum gate operations. The enacted symmetry is related to the global geometric features of qubits transformation based on ancillary oscillator modes, e.g., phonons in an ion-trap system. It is shown that the devised multicircuit symmetrized evolution endows the system with a twofold resilience against decoherence: insensitivity to thermal fluctuations and quantum dissipation.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.060307
DOI:
10.1103/PhysRevA.71.060307
PACS:
03.67.Lx, 03.67.Pp, 03.65.Yz, 03.65.Fd
 
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