Impact of quantum coherence on the dynamics and thermodynamics of quenched free fermions coupled to a localized defect
arXiv:2508.01444 · doi:10.1103/5kt1-5m83
Abstract
We investigate the non-equilibrium quantum dynamics and thermodynamics of free fermions suddenly coupled to a localized defect in a one-dimensional harmonic trap. This setup realizes a quantum quench transformation that gives rise to the orthogonalization of the system's wave-function as an effect of the localized perturbation. Using the Loschmidt echo and the Kirkwood-Dirac quasiprobability (KDQ) distribution of the work done by the defect, we quantify the extent and rate of the orthogonalization dynamics. In particular, we show that initializing the system in a coherent superpositions of energy eigenstates leads to non-classical features, such as Wigner function's negativity and non-positivity of the work KDQ distribution. Starting from simple single-particle superpositions and then progressing with coherent and cat states of few-body fermionic systems, we uncover how quantum coherence and few-body correlations shape the out-of-equilibrium response due to the presence of the defect.
arXiv comment19 pages, 12 figures. Comments and feedback are welcome
References in corpus (39)
- Colloquium. Quantum Fluctuation Relations: Foundations and Applications
- The cold atom Hubbard toolbox
- Environment-independent decoherence rate in classically chaotic systems
- Entanglement and thermodynamics after a quantum quench in integrable systems
- Quantum dynamics of impurities in a 1D Bose gas
- Ultrafast many-body interferometry of impurities coupled to a Fermi sea
- The Statistics of the Work Done on a Quantum Critical System by Quenching a Control Parameter
- Time dependent impurity in ultracold fermions: orthogonality catastrophe and beyond
- Atomic quantum dots coupled to BEC reservoirs
- Decoherence and the Loschmidt echo
- Universal many-body response of heavy impurities coupled to a Fermi sea
- Non-equilibrium quantum fluctuations of work
- The quasiprobability behind the out-of-time-ordered correlator
- Orthogonality catastrophe as a consequence of qubit embedding in an ultra-cold Fermi gas
- Quantum fluctuation theorems, contextuality and work quasi-probabilities
- Orthogonality Catastrophe as a Consequence of the Quantum Speed Limit
- Assessing the non-equilibrium thermodynamics in a quenched quantum many-body system via single projective measurements
- Quantifying quantum coherence via nonreal Kirkwood-Dirac quasiprobability
- Kirkwood-Dirac quasiprobability approach to the statistics of incompatible observables
- Quantum circuits for measuring weak values, Kirkwood--Dirac quasiprobability distributions, and state spectra
- Quantum spin dynamics of individual neutral impurities coupled to a Bose-Einstein condensate
- Kirkwood-Dirac nonclassicality, support uncertainty and complete incompatibility
- Conditions tighter than noncommutation needed for nonclassicality
- Properties and Applications of the Kirkwood-Dirac Distribution
- A many-body heat engine at criticality
- Quasiprobabilities in quantum thermodynamics and many-body systems
- Low-density, one-dimensional quantum gases in a split trap
- Universally Robust Quantum Control
- Projective measurements can probe non-classical work extraction and time-correlations
- Temperature dependent maximization of work and efficiency in a degeneracy assisted quantum Stirling heat engine
- Interaction enhanced quantum heat engine
- Work statistics, quantum signatures and enhanced work extraction in quadratic fermionic models
- Coherent Oscillations in Small Fermi Polaron Systems
- A Feshbach engine in the Thomas-Fermi regime
- Exploring quasiprobability approach to quantum work in the presence of initial coherence: Advantages of the Margenau-Hill distribution
- Quantum work statistics with initial coherence
- Interferometry of quantum correlation functions to access quasiprobability distribution of work
- Controlling the interactions in a cold atom quantum impurity system
- Theory of Irreversibility in Quantum Many-Body Systems