Dynamics of Super Quantum Correlations and Quantum Correlations for a System of Three Qubits

Abstract

The dynamics of quantum discord for two qubits independently interacting with dephasing reservoirs have been studied recently. The authors [Phys. Rev. A 88 (2013) 034304] found that for some Bell-diagonal states (BDS) which interact with their environments the calculation of quantum discord could experience a sudden transition in its dynamics, this phenomenon is known as the sudden change. Here in the present paper, we analyze the dynamics of normal quantum discord and super quantum discord for tripartite Bell-diagonal states independently interacting with dephasing reservoirs. Then, we find that basis change does not necessary mean sudden change of quantum correlations.

Quantum correlations dynamics in two coupled semiconductor InAs quantum dots

“…While for the Markovian regime (i.e t = 0.25 ns), correlations are decreasing asymptotically to zero with increasing time without any revival. This behavior is explained by the fact that the quantum information will very quickly outflow from the system to the environment because of the weak system-environment coupling and the memoryless transfer of information [27,33].…”

“…In order to evaluate the time and temperature dependent quantum correlation, we define the non-Markovian dephasing model, introduced by Daffer et al [31]. This model has been widely used recently for the study of quantum correlations dynamics [7,32,33]. In this work, we use it to address quantum correlations dynamics in double semiconductor quantum dots.…”

Quantum Correlations Dynamics In Two Coupled Semiconductor InAs Quantum Dots

“…In order to evaluate the time and temperature dependent quantum correlation, we define the non-Markovian dephasing model, introduced by Daffer et al [30]. This model has been widely used recently for the study of quantum correlations dynamics [31][32][33]. In this work, we use it to address quantum correlations dynamics in double semiconductor quantum dots.…”