Induced decoherence and entanglement by interacting quantum spin baths

Abstract

The reduced dynamics of a single or two qubits coupled to an interacting quantum spin bath modeled by a XXZ spin chain is investigated. By using the method of time-dependent density matrix renormalization group (t-DMRG), we go beyond the uniform coupling central spin model and evaluate nonperturbatively the induced decoherence and entanglement. It is shown that both decoherence and entanglement strongly depend on the phase of the underlying spin bath. We show that in general, spin baths can induce entanglement for an initially disentangled pair of qubits. Furthermore, when the spin bath is in the ferromagnetic phase, because qubits directly couple to the order parameter, the reduced dynamics shows oscillatory type behavior. On the other hand, only for paramagnetic and antiferromagnetic phases, initially entangled states suffer from the entanglement sudden death. By calculating concurrence, the finite disentanglement time is mapped out for all phases in the phase diagram of the spin bath.

References in corpus (19)

• Finite-Time Disentanglement via Spontaneous Emission
• Real time evolution using the density matrix renormalization group
• Dark periods and revivals of entanglement in a two qubit system
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Non-Markovian dynamics in a spin star system: Exact solution and approximation techniques
• Decoherence induced by interacting quantum spin baths
• Do all states undergo sudden death of entanglement at finite temperature?
• Direct measurement of finite-time disentanglement induced by a reservoir
• Restoring Coherence Lost to a Slow Interacting Mesoscopic Bath
• Coherence Time of a Solid-State Nuclear Qubit
• Exact Master Equation and Quantum Decoherence of Two Coupled Harmonic Oscillators in a General Environment
• Qubit Teleportation and Transfer across Antiferromagnetic Spin Chains
• Non-Markovian reduced dynamics and entanglement evolution of two coupled spins in a quantum spin environment
• Universal decoherence induced by an environmental quantum phase transition
• Control of electron spin decoherence caused by electron-nuclear spin dynamics in a quantum dot
• Universal Scaling of Hyperfine-Induced Electron Spin Echo Decay
• Influence of an external magnetic field on the decoherence of a central spin coupled to an antiferromagnetic environment
• Dynamics of two qubits in a spin-bath of Quantum anisotropic Heisenberg XY coupling type
• Vanishing environment-induced decoherence

Cited by in corpus (28)

• Fidelity approach to quantum phase transitions
• Open-System Dynamics of Entanglement
• Temporal and Spatial Dependence of Quantum Entanglement from a Field Theory Perspective
• Observation of entanglement sudden death and rebirth by controlling solid-state spin bath
• Finite-time destruction of entanglement and non-locality by environmental influences
• Decoherence effects in interacting qubits under the influence of various environments
• Breakdown of the rotating-wave approximation in entanglement description of spin anti-correlated states
• Decoherence from spin environments: Loschmidt echo and quasiparticle excitations
• Quantum entanglement and disentanglement of multi-atom systems
• Entanglement dynamics of two-bipartite system under the influence of dissipative environments
• Rabi oscillations, decoherence, and disentanglement in a qubit-spin-bath system: exact dynamics
• Manipulating and protecting entanglement by means of spin environments
• Decoherence of a single spin coupled to an interacting spin bath
• Challenges and constraints of dynamically emerged source and sink in atomtronic circuits: From closed-system to open-system approaches
• Topology of Entanglement Evolution of Two Qubits
• Exact dynamics of the homogeneous two-qubit $XXZ$ central spin model with the spin bath prepared in superpositions of symmetric Dicke states
• Quantum frustration of dissipation by a spin bath
• Qubit-environment entanglement outside of pure decoherence: hyperfine interaction
• Open quantum dynamics theory for a complex subenvironment system with a quantum thermostat: Application to a spin heat bath
• Quantification of the memory effect of steady-state currents from interaction-induced transport in quantum systems
• Temperature crossover of decoherence rates in chaotic and regular bath dynamics
• Dynamical Decoupling of Qubits in Spin Bath under Periodic Quantum Control
• Collapse and revival structure of information backflow for a central spin coupled to a finite spin bath
• Ultrafast X-ray Absorption Spectroscopy of Strongly Correlated Systems: Core Hole Effect
• Relaxation of antiferromagnetic order and growth of Rényi entropy in a generalized Heisenberg star
• Decoherence of a quantum memory coupled to a collective spin bath
• Stacked quantum Ising systems and quantum Ashkin-Teller model
• Interaction without back-action in the context of quantum manipulation