Quantum computation using weak nonlinearities: Robustness against decoherence

Jeong, H. (2006) Quantum computation using weak nonlinearities: Robustness against decoherence. Physical Review A, 73 5: . doi:10.1103/PhysRevA.73.052320

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Author Jeong, H.
Title Quantum computation using weak nonlinearities: Robustness against decoherence
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2006
Sub-type Article (original research)
DOI 10.1103/PhysRevA.73.052320
Open Access Status File (Publisher version)
Volume 73
Issue 5
Total pages 6
Editor B Crasemann
Place of publication United States
Publisher American Physical Society
Collection year 2006
Language eng
Subject C1
249999 Physical Sciences not elsewhere classified
780102 Physical sciences
Abstract We investigate decoherence effects in the recently suggested quantum-computation scheme using weak nonlinearities, strong probe coherent fields, detection, and feedforward methods. It is shown that in the weak-nonlinearity-based quantum gates, decoherence in nonlinear media can be made arbitrarily small simply by using arbitrarily strong probe fields, if photon-number-resolving detection is used. On the contrary, we find that homodyne detection with feedforward is not appropriate for this scheme because in this case decoherence rapidly increases as the probe field gets larger.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Phase-shifts
States
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2007 Higher Education Research Data Collection
School of Physical Sciences Publications
 
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Created: Wed, 15 Aug 2007, 09:50:26 EST