dc.contributor.author |
Haikka, P. |
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dc.contributor.author |
Goold, John |
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dc.contributor.author |
McEndoo, Suzanne |
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dc.contributor.author |
Plastina, F. |
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dc.contributor.author |
Maniscalco, S. |
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dc.date.accessioned |
2017-08-22T10:30:37Z |
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dc.date.available |
2017-08-22T10:30:37Z |
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dc.date.issued |
2012 |
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dc.identifier.citation |
Haikka, P., Goold, J., McEndoo, S., Plastina, F. and Maniscalco, S. (2012) 'Non-Markovianity, Loschmidt echo, and criticality: A unified picture', Physical Review A, 85(6), 060101 (4pp). doi: 10.1103/PhysRevA.85.060101 |
en |
dc.identifier.volume |
85 |
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dc.identifier.issued |
6 |
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dc.identifier.issn |
1050-2947 |
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dc.identifier.uri |
http://hdl.handle.net/10468/4499 |
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dc.identifier.doi |
10.1103/PhysRevA.85.060101 |
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dc.description.abstract |
A simple relationship between recently proposed measures of non-Markovianity and the Loschmidt echo is established, holding for a two-level system (qubit) undergoing pure dephasing due to a coupling with a many-body environment. We show that the Loschmidt echo is intimately related to the information flowing out from and occasionally back into the system. This, in turn, determines the non-Markovianity of the reduced dynamics. In particular, we consider a central qubit coupled to a quantum Ising ring in the transverse field. In this context, the information flux between system and environment is strongly affected by the environmental criticality; the qubit dynamics is shown to be Markovian exactly and only at the critical point. Therefore, non-Markovianity is an indicator of criticality in the model considered here. |
en |
dc.description.sponsorship |
Finnish Cultural Foundation (Science Workshop on Entanglement) |
en |
dc.format.mimetype |
application/pdf |
en |
dc.language.iso |
en |
en |
dc.publisher |
American Physical Society |
en |
dc.relation.uri |
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.85.060101 |
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dc.rights |
© 2012, American Physical Society |
en |
dc.subject |
Non-Markovianity |
en |
dc.subject |
Loschmidt echo |
en |
dc.subject |
Two-level system |
en |
dc.subject |
Qubit |
en |
dc.subject |
Quantum Ising ring |
en |
dc.title |
Non-Markovianity, Loschmidt echo, and criticality: a unified picture |
en |
dc.type |
Article (peer-reviewed) |
en |
dc.internal.authorcontactother |
John Goold, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: jgoold@phys.ucc.ie |
en |
dc.internal.availability |
Full text available |
en |
dc.description.version |
Published Version |
en |
dc.internal.wokid |
WOS:000305023400001 |
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dc.contributor.funder |
Emil Aaltosen Säätiö
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dc.contributor.funder |
Suomen Kulttuurirahasto
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dc.contributor.funder |
FP7 People: Marie-Curie Actions
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dc.description.status |
Peer reviewed |
en |
dc.identifier.journaltitle |
Physical Review A |
en |
dc.internal.IRISemailaddress |
jgoold@phys.ucc.ie |
en |
dc.identifier.articleid |
60101 |
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dc.relation.project |
info:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/229520/EU/IRCSET International Mobility Fellowships in Science Engineering and Technology: co-funded by Marie Curie Actions/INSPIRE
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