Vala, Jiri and Whaley, K.B. and Weiss, D.S. (2005) Quantum error correction of a qubit loss in an addressable atomic system. Physical Review A, 72 (052318). pp. 1-5. ISSN 1050-2947

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Abstract

We present a scheme for correcting qubit loss error while quantum computing with neutral atoms in an addressable optical lattice. The qubit loss is first detected using a quantum nondemolition measurement and then transformed into a standard qubit error by inserting a new atom in the vacated lattice site. The logical qubit, encoded here into four physical qubits with the Grassl-Beth-Pellizzari code, is reconstructed via a sequence of one projective measurement, two single-qubit gates, and three controlled-NOT operations. No ancillary qubits are required. Both quantum nondemolition and projective measurements are implemented using a cavity quantum electrodynamics system which can also detect a general leakage error and thus allow qubit loss to be corrected within the same framework. The scheme can also be applied in quantum computation with trapped ions or with photons.

Item Type:	Article
Additional Information:	This article is available at DOI: 10.1103/PhysRevA.72.052318 . Our research effort is sponsored by the Defense Advanced Research project Agency DARPA and the Air Force Laboratory, Air Force Material Command, USAF, under Contract No. F30602-01-2-0524.
Keywords:	Quantum error correction; qubit loss; addressable atomic system; quantum computing;
Academic Unit:	Faculty of Science and Engineering > Mathematical Physics
Item ID:	4496
Depositing User:	Dr. Jiri Vala
Date Deposited:	16 Sep 2013 15:42
Journal or Publication Title:	Physical Review A
Publisher:	American Physical Society
Refereed:	Yes
URI:	http://pra.aps.org/
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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