TY - JOUR
ID - 1754
TI - The study of quantum speed limit time in a quantum critical environment
JO - Iranian Journal of Physics Research
JA - IJPR
LA - en
SN - 1682-6957
AU - Haseli, S
AD - Department of Physics, Faculty of Environment, Urmia University of Technology, Urmia, Iran
Y1 - 2022
PY - 2022
VL - 21
IS - 4
SP - 833
EP - 839
KW - quantum speed limit
KW - Open quantum system
KW - Quantum critical environment
DO - 10.47176/ijpr.21.4.21180
N2 - Quantum theory sets a bound on the speed of quantum evolution. The shortest time needed for a quantm system to evolve from an initial state to the target state is known as the quantum speed limit time. The study of this time in open and closed quantum systems has been the subject of much work in quantum information theory. Quantum speed limit time is inversely related to the evolution rate of a quantum process. This relation is such that the speed of evolution decreases with increasing quantum speed limit time and vice versa. In this work we study the QSL time for the case in which a qubit interacts with a quantum critical environment. We choose the environment to be an Ising spin chain in a transverse field. It is observed that for the quantum speed limit time has a direct relation with quantum coherence of the initial state of the system. We will also study the effect of perturbation coupling on quantum speed limit time. It is observed that the quantum speed limit time decreases with increasing the coupling parameter. It is also observed that the quantum speed limit time decreases with increasing the number of spin in spin chain.
UR - https://ijpr.iut.ac.ir/article_1754.html
L1 - https://ijpr.iut.ac.ir/article_1754_129a4a46341b458afef722a3a3c1bfd4.pdf
ER -