Dynamics of Entanglement and Measurement-Induced Disturbance for a Hybrid Qubit-Qutrit System Interacting with a Spin-Chain Environment: A Mean Field Approach

Abstract

We use the mean field method to study the dynamics of thermal entanglement and also the measurement-induced disturbance for a mixed qutrit-qubit system coupled to an environment, comprised of an Ising spin-chain with long range interactions, embedded in a transverse magnetic field. It is revealed that both quantities die down in long enough time and the fade out time is a decreasing function of temperature; however, the environmental magnetic field holds back the decoherence, and increases the fade out time; thus, providing a means to control and postpone the decoherence process. Moreover, it is observed that the discrepancy between the interaction strength of the qubit and the qutrit with the environment, substantially affects the decoherence behavior of the system.

Tighter Constraints of Multiqubit Entanglement*

“…Quantum entanglement is an essential feature of quantum mechanics which distinguishes the quantum from the classical world and plays a very important role in quantum information processing [1][2][3][4]. One singular property of quantum entanglement is that a quantum system entangled with one of the other subsystems limits its entanglement with the remaining ones, known as the monogamy of entanglement (MoE) [5,6].…”

Witnessing Quantum Correlations in a Hybrid Qubit‐Qutrit System Under Intrinsic Decoherence

“…[17][18][19] Hence, many analytical tools, simulation techniques and several other methods for calculating and quantifying quantum correlations have been investigated to explore the separability of bipartite quantum systems. [20,21] Importantly, recent works shed light on studying quantum correlations for qubit-qutrit and qutritqutrit states, [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] which creates a fascinating future in quantum technologies. [39] Due to the possibility of maximum control of the associated Hilbert space, hybrid qubit-qudit systems have become increasingly important in the field of quantum information.…”

Parameterized monogamy and polygamy relations of multipartite entanglement

“…Entanglement is one of the most remarkable phenomena in quantum mechanics, which is also the most important resources in quantum information processing and communication. [1][2][3][4] In recent years, great efforts have been made toward the understanding of the role played by the entanglement in quantum information theory such as quantum teleportation, [5] quantum key distribution, [6] and quantum computing. [7] An important problem in the theory of quantum entanglement is the quantification of entanglement.…”