Entanglement preservation in tripartite quantum systems under dephasing dynamics
arXiv:2311.05660 · doi:10.1209/0295-5075/ad3eac
Abstract
Protecting entanglement from decoherence is a critical aspect of quantum information processsing. For many-body quantum systems evolving under decoherence, estimating multipartite entanglement is challenging. This challenge can be met up by considering distance based measure such as relative entropy of entanglement which decisively measures entanglement in both pure as well as mixed states. In this work, we investigate the tripartite entanglement dynamics of pure and mixed states in the presence of a structured dephasing environment at finite temperature. We show that the robustness of the quantum system to decoherence is dependent on the distribution of entanglement and its relation to different configurations of the bath. If the bath is structured individually such that each qubit has its own environment, the system has different dynamics compared to when the bath is common to all the three qubits. From the results we conjecture that there is a connection between the distribution of entanglement among the qubits and the distribution of bath degrees of freedom, and the interplay of these two distributions determines the decay rate of the entanglement dynamics. The sustainability of tripartite entanglement is shown to be enhanced significantly in presence of reservoir memory.
arXiv comment4 figures
References in corpus (26)
- Quantum entanglement
- Quantum Cryptography
- Entanglement of Formation of an Arbitrary State of Two Qubits
- A computable measure of entanglement
- Decoherence, einselection, and the quantum origins of the classical
- Distributed Entanglement
- Decoherence Free Subspaces for Quantum Computation
- Dynamical Decoupling of Open Quantum Systems
- Entanglement Measures and Purification Procedures
- Non-Markovian dynamics in open quantum systems
- Noiseless Quantum Codes
- Non-Markovian effects on the dynamics of entanglement
- Experimental Quantum Error Correction
- Universal Control of Decoupled Quantum Systems
- Dynamics of the entanglement between two oscillators in the same environment
- Sudden death and sudden birth of entanglement in common structured reservoirs
- Concurrence of mixed multi-partite quantum states
- Scaling laws for the decay of multiqubit entanglement
- Entangled three-qubit states without concurrence and three-tangle
- Fast simulation of stabilizer circuits using a graph state representation
- Quantum regression theorem and non-Markovianity of quantum dynamics
- Non-classical field state stabilization in a cavity by reservoir engineering
- Entangled graphs: Bipartite entanglement in multi-qubit systems
- Complex quantum networks as structured environments: engineering and probing
- Entanglement Sudden Death in Three Qubit X-States
- Non-Markovian finite-temperature two-time correlation functions of system operators of a pure-dephasing model