Non-Markovian probes in ultracold gases

Abstract

We present a detailed investigation of the dynamics of two physically different qubit models, dephasing under the effect of an ultracold atomic gas in a Bose-Einstein condensed (BEC) state. We study the robustness of each qubit probe against environmental noise; even though the two models appear very similar at a first glance, we demonstrate that they decohere in a strikingly different way. This result holds significance for studies of reservoir engineering as well as for using the qubits as quantum probes of the ultracold gas. For each model we study whether and when, upon suitable manipulation of the BEC, the dynamics of the qubit can be described by a (non-)Markovian process and consider the the effect of thermal fluctuations on the qubit dynamics. Finally, we provide an intuitive explanation for the phenomena we observe in terms of the spectral density function of the environment.

6 pages, 4 figures

References in corpus (9)

• Many-Body Physics with Ultracold Gases
• General non-Markovian dynamics of open quantum systems
• Structural phase transitions in low-dimensional ion crystals
• Witness for initial system-environment correlations in open system dynamics
• Collective decoherence of cold atoms coupled to a Bose-Einstein condensate
• Dynamics, dephasing and clustering of impurity atoms in Bose-Einstein condensates
• On the conundrum of deriving exact solutions from approximate master equations
• Limitation of entanglement due to spatial qubit separation
• Local in time master equations with memory effects: Applicability and interpretation

Cited by in corpus (34)

• Quantum Non-Markovianity: Characterization, Quantification and Detection
• Quantum trajectories and open many-body quantum systems
• Quantum stochastic processes and quantum non-Markovian phenomena
• Coherence trapping and information back-flow in dephasing qubits
• Thermometry of ultracold atoms via non-equilibrium work distributions
• Complex quantum networks as structured environments: engineering and probing
• Speed-ups to isothermality: Enhanced quantum thermal machines through control of the system-bath coupling
• Two-qubit non-Markovianity induced by a common environment
• Global and local thermometry schemes in coupled quantum systems
• Nondestructive Probing of Means, Variances, and Correlations of Ultracold-Atomic-System Densities via Qubit Impurities
• Two-step procedure to discriminate discordant from classical correlated or factorized states
• Quantum probes to assess correlations in a composite system
• Momentum-Resolved and Correlations Spectroscopy Using Quantum Probes
• Quantum sensing of temperature close to absolute zero in a Bose-Einstein condensate
• Controlling decoherence speed limit of a single impurity atom in a Bose-Einstein-condensate reservoir
• A gradient algorithm for Hamiltonian identification of open quantum systems
• Non-Markovian qubit dynamics induced by Coulomb crystals
• Role of thermal two-phonon scattering for impurity dynamics in a low-dimensional BEC
• Quantum probe spectroscopy for cold atomic systems
• Interspecies entanglement with impurity atoms in a lattice gas
• Tayloring Bose-Einstein condensate environments for a Rydberg impurity
• Impurity dephasing in a Bose-Hubbard model
• Determining the squeezing in multimode fields using nonlocal quantum probes
• Supersensitive estimation of the coupling rate in cavity optomechanics with an impurity-doped Bose-Einstein condensate
• Read-out of Quasi-periodic Systems using Qubits
• Experimental Snapshot Verification of non-Markovianity with Unknown System-Probe Coupling
• Imaging the interface of a qubit and its quantum-many-body environment
• Experimental Quantum Probing Measurements With No Knowledge on the System-Probe Interaction
• Nearly Markovian maps and entanglement-based bound on corresponding non-Markovianity
• Quantum information flow in impurity qubits interacting with Bose-Bose mixtures
• Fidelity of dynamical maps
• Quantum speed limits in dephasing dynamics of a qubit system coupled to thermal environments
• A Fractional Calculus Framework for Open Quantum Dynamics: From Liouville to Lindblad to Memory Kernels
• Non-destructively probing the thermodynamics of quantum systems with qumodes