Adiabatic freezing of long-range quantum correlations in spin chains
File(s)
Accepted version
Author(s)
Dhar, Himadri Shekhar
Rakshit, Debraj
Sen (De), Aditi
Sen, Ujjwal
Type
Journal Article
Abstract
We consider a process to create quasi–long-range quantum discord between the non-interacting end spins of a quantum spin chain, with the end spins weakly coupled to the bulk of the chain. The process is not only capable of creating long-range quantum correlation but the latter remains frozen, when certain weak end-couplings are adiabatically varied below certain thresholds. We term this phenomenon as adiabatic freezing of quantum correlation. We observe that the freezing is robust to moderate thermal fluctuations and is intrinsically related to the cooperative properties of the quantum spin chain. In particular, we find that the energy gap of the system remains frozen for these adiabatic variations, and moreover, considering the end spins as probes, we show that the interval of freezing can detect the anisotropy transition in quantum XY spin chains. Importantly, the adiabatic freezing of long-range quantum correlations can be simulated with contemporary experimental techniques.
Date Issued
2016-07-20
Date Acceptance
2016-06-22
Citation
EPL, 2016, 114 (6)
ISSN
0295-5075
Publisher
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
Journal / Book Title
EPL
Volume
114
Issue
6
Copyright Statement
© EPLA, 2016. This is an author-created, un-copyedited version of an article accepted for publication in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at https://doi.org/10.1209/0295-5075/114/60007.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000382324500007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
XY-MODEL
STATISTICAL-MECHANICS
MARKOVIAN EVOLUTION
ENTANGLEMENT
DISCORD
STATE
DECOHERENCE
RESOURCE
Publication Status
Published
Article Number
ARTN 60007
Date Publish Online
2016-07-20