2024 : 4 : 12
Abolghasem Daeichian

Abolghasem Daeichian

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-6318-579X
Education: PhD.
ScopusId: 55916844500
Faculty: Engineering
Address: Arak University
Phone: 08632625436

Research

Title
Asymmetric Markovian control of quantum entanglement
Type
JournalPaper
Keywords
feedback control, quantum Markovian control, entanglement, concurrence, master equation
Year
2023
Journal Physica Scripta
DOI
Researchers Abolghasem Daeichian ، Mahdi Mirzaee

Abstract

Expanding utilization of entangled states in quantum technologies, such as quantum information, is a motivating force of developing new methods for enhancement and stabilization of quantum entanglement. This study focuses on using asymmetric laws to control the entangled states of a quantum system consisting of two atoms, each confined in a cavity. The effect of asymmetry laws has been explored in three different scenarios. First, the effect of an asymmetric drive Hamiltonian on a closed quantum system, in which neither the cavity nor the atoms exhibit losses, is studied. Here, the eigenvalues and eigenstates of the total system Hamiltonian have been obtained and the time evolution of the system state has been derived. Also, the fidelity of the system in terms of the asymmetric drive Hamiltonian has been derived analytically. In the second scenario, the stationary solution of an open quantum system, which includes losses in a master equation approach, is derived and the concurrence is studied in terms of the asymmetric drive Hamiltonian and coupling constant. The last scenario is devoted to applying feedback rules to an open quantum system where some heuristic feedback control laws have been proposed. The simulation results show the concurrence boosting in a larger range of driving field and feedback strength when applying the introduced feedback rules.