APS » PROLA » Phys. Rev. A » Volume 63 » Issue 4

Phys. Rev. A 63, 040302 (2001) [4 pages]

Energy barrier to decoherence

Download: PDF (129 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

Ari Mizel, M. W. Mitchell, and Marvin L. Cohen
Department of Physics, University of California at Berkeley, Berkeley, California 94720,
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720

Rapid Communication Received 2 July 2000; published 19 March 2001

We propose a ground-state approach to realizing quantum computers. This scheme is time-independent and inherently defends against decoherence by possessing an energy barrier to excitation. We prove that our time-independent qubits can perform the same algorithms as their time-dependent counterparts. Advantages and disadvantages of the time-independent approach are described. A model involving quantum dots is provided for illustration.


©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRA/v63/e040302
DOI: 10.1103/PhysRevA.63.040302
PACS: 03.67.Lx

[ Abstract  |  Previous article  |  Next article  |  Issue 4 ]