Quasi-equilibrium and quantum correlation in an open spin-pair system
- URL: http://arxiv.org/abs/2303.16451v2
- Date: Fri, 31 Mar 2023 00:55:59 GMT
- Title: Quasi-equilibrium and quantum correlation in an open spin-pair system
- Authors: J.A. Taboada, H.H. Segnorile, C.E. Gonz\'alez, and R.C. Zamar
- Abstract summary: Quasi-equilibrium states that can be prepared in solids through Nuclear Magnetic Resonance (NMR) techniques are out-of-equilibrium states that slowly relax towards thermodynamic equilibrium with the lattice.
In this work, we use the quantum discord dynamics as a witness of the quantum correlation in this kind of state.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quasi-equilibrium states that can be prepared in solids through Nuclear
Magnetic Resonance (NMR) techniques are out-of-equilibrium states that slowly
relax towards thermodynamic equilibrium with the lattice. In this work, we use
the quantum discord dynamics as a witness of the quantum correlation in this
kind of state. The studied system is a dipole interacting spin pair whose
initial state is prepared with the NMR Jeener-Broekaert pulse sequence,
starting from equilibrium at high temperature and high external magnetic field.
It then evolves as an open quantum system within two different dynamic
scenarios: adiabatic decoherence driven by the coupling of the pairs to a
common phonon field, described within a non-markovian approach; and
spin-lattice relaxation represented by a markovian master equation, and driven
by thermal fluctuations. In this way, the studied model is endowed with the
dynamics of a realistic solid sample. The quantum discord rapidly increases
during the preparation of the initial state, escalating several orders of
magnitude compared with thermal equilibrium at room temperature. Despite the
vanishing of coherences during decoherence, the quantum discord oscillates
around this high value and undergoes a minor attenuation, holding the same
order of magnitude as the initial state. Finally, the quantum discord
dissipates within a time scale shorter than but comparable to spin-lattice
relaxation.
Related papers
- Mpemba effect and super-accelerated thermalization in the damped quantum harmonic oscillator [0.0]
Mpemba effect implies that non-equilibrium states can relax more rapidly when they are further from equilibrium.
We show a quantum manifestation of the Mpemba effect in a simple and paradigmatic model of open quantum systems.
In particular, one can find a broad class of far-from-equilibrium distributions that relax to equilibrium faster than any other initial thermal state.
arXiv Detail & Related papers (2024-11-14T17:00:20Z) - Quantum Effects on the Synchronization Dynamics of the Kuramoto Model [62.997667081978825]
We show that quantum fluctuations hinder the emergence of synchronization, albeit not entirely suppressing it.
We derive an analytical expression for the critical coupling, highlighting its dependence on the model parameters.
arXiv Detail & Related papers (2023-06-16T16:41:16Z) - Hyper-acceleration of quantum thermalization dynamics by bypassing
long-lived coherences: An analytical treatment [0.0]
We develop a perturbative technique for solving Markovian quantum dissipative dynamics.
We show how to bypass a long-lived coherent dynamics and accelerate the relaxation to thermal equilibration in a hyper-exponential manner.
arXiv Detail & Related papers (2023-01-15T16:34:02Z) - Indication of critical scaling in time during the relaxation of an open
quantum system [34.82692226532414]
Phase transitions correspond to the singular behavior of physical systems in response to continuous control parameters like temperature or external fields.
Near continuous phase transitions, associated with the divergence of a correlation length, universal power-law scaling behavior with critical exponents independent of microscopic system details is found.
arXiv Detail & Related papers (2022-08-10T05:59:14Z) - Partition of kinetic energy and magnetic moment in dissipative
diamagnetism [20.218184785285132]
We analyze dissipative diamagnetism, arising due to dissipative cyclotron motion in two dimensions, in the light of the quantum counterpart of energy equipartition theorem.
The expressions for kinetic energy and magnetic moment are reformulated in the context of superstatistics.
arXiv Detail & Related papers (2022-07-30T08:07:28Z) - Emergent pair localization in a many-body quantum spin system [0.0]
Generically, non-integrable quantum systems are expected to thermalize as they comply with the Eigenstate Thermalization Hypothesis.
In the presence of strong disorder, the dynamics can possibly slow down to a degree that systems fail to thermalize on experimentally accessible timescales.
We study an ensemble of Heisenberg spins with a tunable distribution of random coupling strengths realized by a Rydberg quantum simulator.
arXiv Detail & Related papers (2022-07-28T16:31:18Z) - Fractional resonances and prethermal states in Floquet systems [0.0]
In periodically-driven quantum systems, resonances can induce exotic nonequilibrium behavior and new phases of matter without static analog.
We report on the emergence of fractional and integer resonances in a broad class of many-body Hamiltonians with a modulated hopping with a frequency that is either a fraction or an integer of the on-site interaction.
Our findings reveal novel features of the nonequilibrium quantum many-body system, such as the coexistence of Floquet prethermalization and localization.
arXiv Detail & Related papers (2021-11-12T21:35:20Z) - Quantum coherence, correlations and nonclassical states in the two-qubit
Rabi model with parametric oscillator [0.0]
Quantum coherence and quantum correlations are studied in a strongly interacting system composed of two qubits and a parametric medium.
We employ the adiabatic approximation approach to analytically solve the system.
The reconstructed states are observed to be nearly pure generalized Bell states.
arXiv Detail & Related papers (2021-06-12T11:16:40Z) - Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas.
Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit.
The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
arXiv Detail & Related papers (2020-08-05T18:00:26Z) - Probing eigenstate thermalization in quantum simulators via
fluctuation-dissipation relations [77.34726150561087]
The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems.
Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations.
Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
arXiv Detail & Related papers (2020-07-20T18:00:02Z) - Algorithmic Cooling of Nuclear Spin Pairs using a Long-Lived Singlet
State [48.7576911714538]
We show that significant cooling is achieved on an ensemble of spin-pair systems by exploiting the long-lived nuclear singlet state.
This is the first demonstration of algorithmic cooling using a quantum superposition state.
arXiv Detail & Related papers (2019-12-31T09:57:03Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.