Dual-probe decoherence microscopy: Probing pockets of coherence in a decohering environment

Jeske, Jan, Cole, Jared H., Mueller, Clemens, Marthaler, Michael and Schoen, Gerd (2012) Dual-probe decoherence microscopy: Probing pockets of coherence in a decohering environment. New Journal of Physics, 14 . doi:10.1088/1367-2630/14/2/023013


Author Jeske, Jan
Cole, Jared H.
Mueller, Clemens
Marthaler, Michael
Schoen, Gerd
Title Dual-probe decoherence microscopy: Probing pockets of coherence in a decohering environment
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2012-02
Sub-type Article (original research)
DOI 10.1088/1367-2630/14/2/023013
Open Access Status DOI
Volume 14
Total pages 27
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Subject 3100 Physics and Astronomy
Formatted abstract
We study the use of a pair of qubits as a decoherence probe of a nontrivial environment. This dual-probe configuration is modelled by three twolevel systems (TLSs), which are coupled in a chain in which the middle system represents an environmental TLS. This TLS resides within the environment of the qubits and therefore its coupling to perturbing fluctuations (i.e. its decoherence) is assumed much stronger than the decoherence acting on the probe qubits. We study the evolution of such a tripartite system including the appearance of a decoherence-free state (dark state) and non-Markovian behaviour. We find that all parameters of this TLS can be obtained from measurements of one of the probe qubits. Furthermore, we show the advantages of two qubits in probing environments and the new dynamics imposed by a TLS that couples to two qubits at once.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Created: Thu, 18 Sep 2014, 09:16:42 EST by Ms Kate Rowe on behalf of Engineered Quantum Systems