scholarly journals Light-cone effect and relaxation after a quantum quench from excited states in the Ising chain

2014 ◽  
Vol 566 ◽  
pp. 012026 ◽  
Author(s):  
Leda Bucciantini
Keyword(s):  
Excited States ◽  
Light Cone ◽  
Ising Chain ◽  
Quantum Quench

scholarly journals Irreversible work versus fidelity susceptibility for infinitesimal quenches

2017 ◽  
Vol 31 (06) ◽  
pp. 1750065 ◽  
Author(s):  
Simone Paganelli ◽  
Tony J. G. Apollaro
Keyword(s):  
Quantum System ◽  
Excited States ◽  
Ground State ◽  
Finite Size ◽  
Scaling Relations ◽  
Zero Temperature ◽  
Finite Size Scaling ◽  
Ising Chain ◽  
Extra Term ◽  
Explicit Relation

We compare the irreversible work produced in an infinitesimal sudden quench of a quantum system at zero temperature with its ground state fidelity susceptibility, giving an explicit relation between the two quantities. We find that the former is proportional to the latter but for an extra term appearing in the irreversible work which includes also contributions from the excited states. We calculate explicitly the two quantities in the case of the quantum Ising chain, showing that at criticality they exhibit different scaling behaviors. The irreversible work, rescaled by square of the quench’s amplitude, exhibits a divergence slower than that of the fidelity susceptibility. As a consequence, the two quantities obey also different finite-size scaling relations.

scholarly journals Quantum Quench in the Transverse-Field Ising Chain

2011 ◽  
Vol 106 (22) ◽  
Author(s):  
Pasquale Calabrese ◽  
Fabian H. L. Essler ◽  
Maurizio Fagotti
Keyword(s):  
Transverse Field ◽  
Ising Chain ◽  
Quantum Quench

scholarly journals Quantum Quench in an Atomic One-Dimensional Ising Chain

2013 ◽  
Vol 111 (5) ◽  
Author(s):  
F. Meinert ◽  
M. J. Mark ◽  
E. Kirilov ◽  
K. Lauber ◽  
P. Weinmann ◽  
...  
Keyword(s):  
Ising Chain ◽  
One Dimensional ◽  
Quantum Quench

scholarly journals Determination of the possible quantum numbers for the newly observed Ξb(6227)0 state

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
K. Azizi ◽  
Y. Sarac ◽  
H. Sundu
Keyword(s):  
Experimental Data ◽  
Excited State ◽  
Excited States ◽  
Light Cone ◽  
Sum Rules ◽  
Lhcb Collaboration ◽  
Coupling Constants ◽  
Final State ◽  
Quantum Numbers

Abstract The LHCb Collaboration recently reported the observation of a new excited bottom baryon Ξb(6227)0 and announced an improvement in the measurements related to the previously observed Ξb(6227)− state. We conduct an analysis for Ξb(6227)0 state considering it as isospin partner of the Ξb(6227)− resonance and possibly 1P or 2S excited state with spin J = $$ \frac{3}{2} $$ 3 2 . The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to $$ {\Xi}_b^{-}{\pi}^{+} $$ Ξ b − π + final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of Ξb(6227)0 to be the 1P excited state of Ξb(5945)0 baryon.

scholarly journals Stationary entropies after a quench from excited states in the Ising chain

2014 ◽  
Vol 107 (4) ◽  
pp. 40002 ◽  
Author(s):  
Márton Kormos ◽  
Leda Bucciantini ◽  
Pasquale Calabrese
Keyword(s):  
Excited States ◽  
Ising Chain

scholarly journals Quantum quench in a driven Ising chain

2021 ◽  
Vol 103 (14) ◽  
Author(s):  
Neil J. Robinson ◽  
Isaac Pérez Castillo ◽  
Edgar Guzmán-González
Keyword(s):  
Ising Chain ◽  
Quantum Quench
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