2015
DOI: 10.1038/srep16490
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Abstract: Understanding phase transitions in quantum matters constitutes a significant part of present day condensed matter physics. Quantum phase transitions concern ground state properties of many-body systems, and hence their signatures are expected to be pronounced in low-energy states. Here we report signature of a quantum critical point manifested in strongly out-of-equilibrium states with finite energy density with respect to the ground state and extensive (subsystem) entanglement entropy, generated by an externa… Show more

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Cited by 27 publications
(24 citation statements)
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“…Recently, some studies have also focused on the possibility of probing quantum transitions analyzing the out-of-equilibrium dynamics arising from quantum quenches, for example when instantaneously changing the Hamiltonian parameters, setting them to values corresponding to different quantum phases (see, in particular, Refs. [47][48][49][50][51]).…”
Section: Introductionmentioning
confidence: 99%
“…Recently, some studies have also focused on the possibility of probing quantum transitions analyzing the out-of-equilibrium dynamics arising from quantum quenches, for example when instantaneously changing the Hamiltonian parameters, setting them to values corresponding to different quantum phases (see, in particular, Refs. [47][48][49][50][51]).…”
Section: Introductionmentioning
confidence: 99%
“…For Γ < 1, the former pole is inside the unit circle and for Γ > 1, the latter is inside. Such swapping of poles that leads to a change in functional behavior and to non-analyticity has also been observed elsewhere [39] in slightly different context.…”
Section: Initial Magnetization As Derived From Eq (17) Is Given Bymentioning
confidence: 87%
“…Spectral information can be obtained from the resulting non-equilibrium dynamics via a straightforward Fourier transform. Quenches have previously been used to identify quantum phase transitions [94][95][96][97]. The main object of interest in quench spectroscopy is the quench spectral function (QSF).…”
Section: A General Strategymentioning
confidence: 99%