Temperature effects on quantum non-Markovianity via collision models

Abstract

Quantum non-Markovianity represents memory during the system dynamics, which is typically weakened by the temperature. We here study the effects of environmental temperature on the non-Markovianity of an open quantum system by virtue of collision models. The environment is simulated by a chain of ancillary qubits that are prepared in thermal states with a finite temperature $T$. Two distinct non-Markovian mechanisms are considered via two types of collision models, one where the system $S$ consecutively interacts with the ancillas and a second where $S$ collides only with an intermediate system $S^{\prime }$ which in turn interacts with the ancillas. We show that in both models the relation between non-Markovianity and temperature is non-monotonic. In particular, revivals of non-Markovianity may occur as temperature increases. We find that the physical reason behind this behavior can be revealed by examining a peculiar system-environment coherence exchange, leading to ancillary qubit coherence larger than system coherence which triggers information backflow from the environment to the system. These results provide insights on the mechanisms underlying the counterintuitive phenomenon of temperature-enhanced quantum memory effects.

9 pages, 10 figures

References in corpus (24)

• Quantum Computing in the NISQ era and beyond
• Non-Markovian effects on the dynamics of entanglement
• Entanglement dynamics of two independent qubits in environments with and without memory
• On measures of non-Markovianity: divisibility vs. backflow of information
• Optimal state pairs for non-Markovian quantum dynamics
• Collision-model-based approach to non-Markovian quantum dynamics
• Experimental on-demand recovery of entanglement by local operations within non-Markovian dynamics
• Preserving entanglement and nonlocality in solid-state qubits by dynamical decoupling
• Composite quantum collision models
• Simulation of indivisible qubit channels in collision models
• Implications of non-Markovian dynamics for the Landauer bound
• Collision models in quantum optics
• Harnessing non-Markovian quantum memory by environmental coupling
• Quantification of memory effects in the spin-boson model
• Divisibility of quantum dynamical maps and collision models
• Dynamical role of system-environment correlations in non-Markovian dynamics
• Environmental correlations and Markovian to non-Markovian transitions in collisional models
• Heat flux dynamics in dissipative cascaded systems
• Coarse graining a non-Markovian collisional model
• Relaxation due to random collisions with a many-qudit environment
• Quantum non-Markovian piecewise dynamics from collision models
• Reversible and irreversible dynamics of a qubit interacting with a small environment
• Entanglement dynamics and relaxation in a few qubit system interacting with random collisions
• Negativity of quantumness and non-Markovianity in a qubit coupled to a thermal Ising spin bath system

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• Collision models in open system dynamics: A versatile tool for deeper insights?
• Experimental progress on quantum coherence: detection, quantification, and manipulation
• Entropy production and asymptotic factorization via thermalization: a collisional model approach
• Validity of Landauer principle and quantum memory effects via collision models
• Battery charging in collision models with Bayesian risk strategies
• Imperfect Thermalizations Allow for Optimal Thermodynamic Processes
• Memory kernel and divisibility of Gaussian Collisional Models
• Coherence as a measure for non-Markovianity and its applications to color centers in diamond
• Correlations break homogenization
• Dissipation induced information scrambling in a collision model
• Entanglement dynamics of an open moving-biparticle system driven by classical-field
• Effect of inter-system coupling on heat transport in a microscopic collision model
• The time crystal phase emerges from the qubit network under unitary random operations
• Engineering non-Markovianity from defect-phonon interactions
• Tunable non-Markovian dynamics in a collision model: an application to coherent transport
• Heating and cooling processes via phaseonium-driven dynamics of cascade systems
• Time evolution of quantum correlations in presence of state dependent bath
• Hierarchical-environment-assisted non-Markovian and its effect on thermodynamic properties