Document Detail

Conditional dynamics of interacting quantum dots.
MedLine Citation:
PMID:  18467585     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Conditional quantum dynamics, where the quantum state of one system controls the outcome of measurements on another quantum system, is at the heart of quantum information processing. We demonstrate conditional dynamics for two coupled quantum dots, whereby the probability that one quantum dot makes a transition to an optically excited state is controlled by the presence or absence of an optical excitation in the neighboring dot. Interaction between the dots is mediated by the tunnel coupling between optically excited states and can be optically gated by applying a laser field of the right frequency. Our results represent substantial progress toward realization of an optically effected controlled-phase gate between two solid-state qubits.
Lucio Robledo; Jeroen Elzerman; Gregor Jundt; Mete Atatüre; Alexander Högele; Stefan Fält; Atac Imamoglu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  320     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-05-09     Completed Date:  2008-05-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  772-5     Citation Subset:  -    
Institute of Quantum Electronics, Eidgenössische Technische Hochschule (ETH)-Zürich, CH-8093 Zürich, Switzerland.
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