Quantum systems in Markovian environments
- URL: http://arxiv.org/abs/2308.07996v1
- Date: Tue, 15 Aug 2023 19:00:25 GMT
- Title: Quantum systems in Markovian environments
- Authors: Henryk Gzyl
- Abstract summary: We develop a framework to model a quantum system whose Hamiltonian may depend on the state of changing environment.
We show how to average over the environment to predict the expected values of observables.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: In this work, we develop a mathematical framework to model a quantum system
whose Hamiltonian may depend on the state of changing environment, that evolves
according to a Markovian process. When the environment changes its state, the
quantum system may suffer a shock that produces an instantaneous transition
among its states. The model that we propose can be readily adapted to more
general settings.\\ To avoid collateral analytical issues, we consider the case
of quantum systems with finite dimensional state space, in which case the
observables are described by Hermitian matrices. We show how to average over
the environment to predict the expected values of observables.
Related papers
- Exact Hidden Markovian Dynamics in Quantum Circuits [1.2845309023495566]
We show that the influence of the time-evolved global system on a finite subsystem can be analytically described by sequential, time-local quantum channels.
The realization of exact hidden Markovian property is facilitated by a solvable condition on the underlying two-site gates in the quantum circuit.
arXiv Detail & Related papers (2024-03-21T19:42:21Z) - Universal fluctuations and noise learning from Hilbert-space ergodicity [3.55103790558995]
Recently a quantum notion of ergodicity has been proposed, namely that isolated, global quantum states uniformly explore their available state space.
Here we observe signatures of this process with an experimental Rydberg quantum simulator and various numerical models.
We then consider the case of an open system interacting noisily with an external environment.
arXiv Detail & Related papers (2024-03-18T17:09:05Z) - Imperfect Measurements and Conjugate Observables [0.0]
We relax the standard von Neumann interaction used in Quantum measurements by allowing for imperfect measurements.
It is possible to attain approximate decoherence of conjugate quantities that resembles classical physics.
arXiv Detail & Related papers (2024-01-10T09:02:24Z) - On the Emergent "Quantum" Theory in Complex Adaptive Systems [0.0]
We explore the concept of emergent quantum-like theory in complex adaptive systems.
We examine the concrete example of such an emergent (or "mock") quantum theory in the Lotka-Volterra system.
arXiv Detail & Related papers (2023-10-21T19:35:39Z) - 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) - Geometric phases along quantum trajectories [58.720142291102135]
We study the distribution function of geometric phases in monitored quantum systems.
For the single trajectory exhibiting no quantum jumps, a topological transition in the phase acquired after a cycle.
For the same parameters, the density matrix does not show any interference.
arXiv Detail & Related papers (2023-01-10T22:05:18Z) - Probing finite-temperature observables in quantum simulators of spin
systems with short-time dynamics [62.997667081978825]
We show how finite-temperature observables can be obtained with an algorithm motivated from the Jarzynski equality.
We show that a finite temperature phase transition in the long-range transverse field Ising model can be characterized in trapped ion quantum simulators.
arXiv Detail & Related papers (2022-06-03T18:00:02Z) - Time and Evolution in Quantum and Classical Cosmology [68.8204255655161]
We show that it is neither necessary nor sufficient for the Poisson bracket between the time variable and the super-Hamiltonian to be equal to unity in all of the phase space.
We also discuss the question of switching between different internal times as well as the Montevideo interpretation of quantum theory.
arXiv Detail & Related papers (2021-07-02T09:17:55Z) - Non-equilibrium stationary states of quantum non-Hermitian lattice
models [68.8204255655161]
We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner.
We focus on the quantum steady states of such models for both fermionic and bosonic systems.
arXiv Detail & Related papers (2021-03-02T18:56:44Z) - Thermodynamic uncertainty relation for general open quantum systems [4.111899441919164]
We derive a thermodynamic uncertainty relation for general open quantum dynamics.
We apply our relation to continuous measurement and the quantum walk to find that the quantum nature of the system can enhance the precision.
arXiv Detail & Related papers (2020-03-19T03:45:03Z) - Entropic Uncertainty Relations and the Quantum-to-Classical transition [77.34726150561087]
We aim to shed some light on the quantum-to-classical transition as seen through the analysis of uncertainty relations.
We employ entropic uncertainty relations to show that it is only by the inclusion of imprecision in our model of macroscopic measurements that we can prepare a system with two simultaneously well-defined quantities.
arXiv Detail & Related papers (2020-03-04T14:01:17Z)
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.