Decoherence from spin environments: Loschmidt echo and quasiparticle excitations

Abstract

We revisit the problem of decoherence of a qubit centrally coupled to an interacting spin environment, here modeled by a quantum compass chain or an extended XY model in a staggered magnetic field. These two models both support distinct spin liquid phases, adding a new element to the problem. By analyzing their Loschmidt echoes when perturbed by the qubit we find that a fast decoherence of the qubit is conditioned on the presence of propagating quasiparticles which couple to it. Different from expectations based on earlier works on central spin models, our result implies that the closeness of an environment to a quantum phase transition is neither a sufficient nor a necessary condition for an accelerated decoherence rate of a qubit.

13 pages, 9 figures

References in corpus (30)

• Many-Body Physics with Ultracold Gases
• Decoherence, einselection, and the quantum origins of the classical
• Decoherence, the measurement problem, and interpretations of quantum mechanics
• Equilibration, thermalisation, and the emergence of statistical mechanics in closed quantum systems
• Decay of Loschmidt Echo Enhanced by Quantum Criticality
• Dynamics of Loschmidt echoes and fidelity decay
• Decoherence from spin environments
• Gaussian Decoherence from Random Spin Environments
• Decoherence induced by interacting quantum spin baths
• Decoherence and the Loschmidt echo
• Disentanglement in a quantum critical environment
• Non-Markovianity, Loschmidt echo and criticality: a unified picture
• Loschmidt Echo Revivals: Critical and Noncritical
• Phase Diagram of the spin S=1/2 Extended XY model
• Control of electron spin decoherence caused by electron-nuclear spin dynamics in a quantum dot
• Universal decoherence induced by an environmental quantum phase transition
• Loschmidt Echo and Berry phase of the quantum system coupled to the XY spin chain: Proximity to quantum phase transition
• Parity Effects in Spin Decoherence
• Multicriticality and entanglement in the one-dimensional quantum compass model
• Induced decoherence and entanglement by interacting quantum spin baths
• Bang-Bang control of a qubit coupled to a quantum critical spin bath
• Decoherence induced by a dynamic spin environment (I): The universal regime
• Quench dynamics and ground state fidelity of the one-dimensional extended quantum compass model in a transverse field
• Study of Loschmidt Echo for a qubit coupled to an XY-spin chain environment
• Decoherence in the dynamical quantum phase transition of the transverse Ising chain
• Quantum phase transitions in exactly solvable one-dimensional compass models
• Exact treatment of magnetism-driven ferroelectricity in the one-dimensional compass model
• Quantum Phase Transition in the One-Dimensional Extended Quantum Compass Model in a Transverse Field
• Vanishing environment-induced decoherence
• The three site interacting spin chain in staggered field: Fidelity vs Loschmidt echo

Cited by in corpus (25)

• Orthogonality Catastrophe as a Consequence of the Quantum Speed Limit
• Quench dynamics and zero-energy modes: the case of the Creutz model
• Coherent and dissipative dynamics at quantum phase transitions
• Dynamical Quantum Phase Transition and Quasi Particle Excitation
• Dynamical Topological Quantum Phase Transitions at Criticality
• Disordered Kitaev chain with long-range pairing: Loschmidt echo revivals and dynamical phase transitions
• Dynamics of Quantum Coherence and Quantum Fisher Information After Sudden Quench
• Quasiperiodic dynamical quantum phase transitions in multiband topological insulators and connections with entanglement entropy and fidelity susceptibility
• Anomaly in dynamical quantum phase transition in non-Hermitian system with extended gapless phases
• Dynamical quantum correlations after sudden quenches
• Complexity and information geometry in spin chains
• Quench dynamics and scaling laws in topological nodal loop semimetals
• Dynamical bulk boundary correspondence and dynamical quantum phase transitions in higher order topological insulators
• Dynamical Quantum Phase Transitions Following Double Quenches: Persistence of the Initial State vs Dynamical Phases
• Detecting topological phases via survival probabilities of edge Majorana fermions
• Dynamics of decoherence of an entangled pair of qubits locally connected to a one-dimensional disordered spin chain
• Fisher zeroes and dynamical quantum phase transitions for two- and three-dimensional models
• Continuous dynamical decoupling of spin chains: modulating the spin-environment and spin-spin interactions
• Dynamics of decoherence in a noisy driven environment
• Trends of information backflow in disordered spin chains
• Stacked quantum Ising systems and quantum Ashkin-Teller model
• On the reliability and accessibility of quantum measurement apparatuses
• Loschmidt echo and Momentum Distribution in a Kitaev Spin Chain
• Exact Solutions and Degenerate Properties of Spin Chains with Reducible Hamiltonians
• A Dynamical Bulk-Boundary Correspondence in Two Dimensional Topological Matter