Continuous measurements in probability representation of quantum
mechanics
- URL: http://arxiv.org/abs/2101.07568v2
- Date: Mon, 5 Jul 2021 09:44:59 GMT
- Title: Continuous measurements in probability representation of quantum
mechanics
- Authors: Yan Przhiyalkovskiy
- Abstract summary: The continuous quantum measurement within the probability representation of quantum mechanics is discussed.
The classical propagator of the symplectic tomogram associated to a particular measurement outcome is introduced.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The continuous quantum measurement within the probability representation of
quantum mechanics is discussed. The partial classical propagator of the
symplectic tomogram associated to a particular measurement outcome is
introduced, for which the representation of a continuous measurement through
the restricted path integral is applied. The classical propagator for the
system undergoing a non-selective measurement is derived by summing these
partial propagators over the entire outcome set. The elaborated approach is
illustrated by considering non-selective position measurement of a quantum
oscillator and a particle.
Related papers
- Action formalism for geometric phases from self-closing quantum
trajectories [55.2480439325792]
We study the geometric phase of a subset of self-closing trajectories induced by a continuous Gaussian measurement of a single qubit system.
We show that the geometric phase of the most likely trajectories undergoes a topological transition for self-closing trajectories as a function of the measurement strength parameter.
arXiv Detail & Related papers (2023-12-22T15:20:02Z) - Quantum retrodiction in Gaussian systems and applications in
optomechanics [0.9065034043031668]
The task of quantum state retrodiction is rigorously and elegantly addressed in quantum measurement theory.
This article presents its practical formulation for retrodicting Gaussian quantum states using continuous-time homodyne measurements.
We identify and achievable retrodictive POVMs in common optomechanical operating modes with resonant or off-resonant driving fields.
arXiv Detail & Related papers (2023-09-07T06:36:11Z) - 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) - Objectivity of classical quantum stochastic processes [0.0]
We investigate what can be concluded about a quantum system when sequential quantum measurements of its observable fulfill the Kolmogorov consistency condition.
It can be said that the trajectory interpretation suggested by the Kolmogorov consistent measurements also applies in contexts other than sequential measurements.
arXiv Detail & Related papers (2023-04-14T12:59:44Z) - Quantifying measurement-induced quantum-to-classical crossover using an
open-system entanglement measure [49.1574468325115]
We study the entanglement of a single particle under continuous measurements.
We find that the entanglement at intermediate time scales shows the same qualitative behavior as a function of the measurement strength.
arXiv Detail & Related papers (2023-04-06T09:45:11Z) - Quantized dynamics in closed quantum systems [0.0]
We propose an approach to process data from interferometric measurements on a closed quantum system at random times.
A classical limit exists which is separated from the quantum fluctuations.
Some generic properties are linked to a quantized Berry phase.
arXiv Detail & Related papers (2020-12-07T14:15:46Z) - 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) - Quantum particle across Grushin singularity [77.34726150561087]
We study the phenomenon of transmission across the singularity that separates the two half-cylinders.
All the local realisations of the free (Laplace-Beltrami) quantum Hamiltonian are examined as non-equivalent protocols of transmission/reflection.
This allows to comprehend the distinguished status of the so-called bridging' transmission protocol previously identified in the literature.
arXiv Detail & Related papers (2020-11-27T12:53:23Z) - The role of boundary conditions in quantum computations of scattering
observables [58.720142291102135]
Quantum computing may offer the opportunity to simulate strongly-interacting field theories, such as quantum chromodynamics, with physical time evolution.
As with present-day calculations, quantum computation strategies still require the restriction to a finite system size.
We quantify the volume effects for various $1+1$D Minkowski-signature quantities and show that these can be a significant source of systematic uncertainty.
arXiv Detail & Related papers (2020-07-01T17:43:11Z) - 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.