Short-time behavior of a system ruled by non-Hermitian time-dependent Hamiltonians
- URL: http://arxiv.org/abs/2508.13194v1
- Date: Fri, 15 Aug 2025 21:05:32 GMT
- Title: Short-time behavior of a system ruled by non-Hermitian time-dependent Hamiltonians
- Authors: Benedetto Militello, Anna Napoli,
- Abstract summary: The short-time behavior of the survival probability of a system governed by a time-dependent non-Hermitian Hamiltonian is derived.<n>For example, it becomes possible to predict a quantum Zeno effect even in the presence of decay processes.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The short-time behavior of the survival probability of a system governed by a time-dependent non-Hermitian Hamiltonian is derived using to the second order perturbative approach. The resulting expression allows for the analysis of some situations which could be of interest in the field of quantum technology. For example, it becomes possible to predict a quantum Zeno effect even in the presence of decay processes.
Related papers
- Time Symmetry, Retrocausality, and Emergent Collapse: The Tlalpan Interpretation of Quantum Mechanics [51.56484100374058]
The Tlalpan Interpretation (QTI) proposes that the wavefunction collapse is not a primitive, axiomatic rule but an emergent phenomenon.<n>The novelty of QTI lies in its embedding of collapse within the conceptual language of critical phenomena in statistical physics.
arXiv Detail & Related papers (2025-08-25T20:30:56Z) - Unitary description of the Jaynes-Cummings model under fractional-time dynamics [0.0]
We show that a unitary evolution can be achieved for a traceless two-level Hamiltonian.<n>We take into account the fractional-order parameter $alpha$ and its effect in unitary quantum dynamics.
arXiv Detail & Related papers (2024-09-09T17:44:31Z) - Wavefunction collapse driven by non-Hermitian disturbance [0.0]
We model the interaction between a quantum particle and an "apparatus" through a non-Hermitian Hamiltonian term.
We analyze how the strength and other parameters of the non-Hermitian perturbation influence the time-to-collapse of the wave function.
arXiv Detail & Related papers (2024-04-25T09:25:17Z) - Real-time dynamics of false vacuum decay [49.1574468325115]
We investigate false vacuum decay of a relativistic scalar field in the metastable minimum of an asymmetric double-well potential.
We employ the non-perturbative framework of the two-particle irreducible (2PI) quantum effective action at next-to-leading order in a large-N expansion.
arXiv Detail & Related papers (2023-10-06T12:44:48Z) - Continuously Monitored Quantum Systems beyond Lindblad Dynamics [68.8204255655161]
We study the probability distribution of the expectation value of a given observable over the possible quantum trajectories.
The measurements are applied to the entire system, having the effect of projecting the system into a product state.
arXiv Detail & Related papers (2023-05-06T18:09:17Z) - Non-Hermitian description of sharp quantum resetting [0.0]
We study a non-interacting quantum particle, moving on a one-dimensional lattice, which is subjected to repetitive measurements.
We investigate the consequence when such motion is interrupted and restarted from the same initial configuration, known as the quantum resetting problem.
We show that such systems can be described by the time evolution under certain time-dependent non-Hermitian Hamiltonians.
arXiv Detail & Related papers (2023-03-07T10:59:37Z) - Universality of critical dynamics with finite entanglement [68.8204255655161]
We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement.
Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
arXiv Detail & Related papers (2023-01-23T19:23:54Z) - Quantum Dynamics under continuous projective measurements: non-Hermitian
description and the continuous space limit [0.0]
The time of arrival of a quantum system in a specified state is considered in the framework of the repeated measurement protocol.
For a particular choice of system-detector coupling, the Zeno effect is avoided and the system can be described effectively by a non-Hermitian effective Hamiltonian.
arXiv Detail & Related papers (2020-12-02T13:29:22Z) - Stochastic process emerged from lattice fermion systems by repeated
measurements and large-time limit [0.0]
In quantum theory, measurements may suppress Hamiltonian dynamics of a system.
In the present paper, we consider the long time repeated measurements and the dynamics of quantum body systems.
arXiv Detail & Related papers (2020-07-28T01:46:36Z) - Unraveling the topology of dissipative quantum systems [58.720142291102135]
We discuss topology in dissipative quantum systems from the perspective of quantum trajectories.
We show for a broad family of translation-invariant collapse models that the set of dark state-inducing Hamiltonians imposes a nontrivial topological structure on the space of Hamiltonians.
arXiv Detail & Related papers (2020-07-12T11:26:02Z) - Quantum Zeno effect appears in stages [64.41511459132334]
In the quantum Zeno effect, quantum measurements can block the coherent oscillation of a two level system by freezing its state to one of the measurement eigenstates.
We show that the onset of the Zeno regime is marked by a $textitcascade of transitions$ in the system dynamics as the measurement strength is increased.
arXiv Detail & Related papers (2020-03-23T18:17:36Z)
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.