Decoherence and quantum quench: their relationship with excited state quantum phase transitions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10127627" target="_blank" >RIV/00216208:11320/12:10127627 - isvavai.cz</a>
Result on the web
<a href="http://http:/dx.doi.org/10.1063/1.4759412" target="_blank" >http://http:/dx.doi.org/10.1063/1.4759412</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4759412" target="_blank" >10.1063/1.4759412</a>

Result language
angličtina
Original language name
Decoherence and quantum quench: their relationship with excited state quantum phase transitions
Original language description
We study the similarities and differences between the phenomena of Quantum Decoherence and Quantum Quench in presence of an Excited State Quantum Phase Transition (ESQPT). We analyze, on one hand, the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics and, on the other, we treat the quantum relaxation process that follows an abrupt quench in the control parameter of the system Hamiltonian. We explore how the Quantum Decoherence and thequantum relaxation process are affected by the presence of an ESQPT. We conclude that the dynamics of the qubit or the quantum relaxation process change dramatically when the system passes through a continuous ESQPT.
Czech name
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Czech description
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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