Weak measurement as a tool for studying coherence and quantum
correlations in bipartite systems
- URL: http://arxiv.org/abs/2304.02280v1
- Date: Wed, 5 Apr 2023 08:07:06 GMT
- Title: Weak measurement as a tool for studying coherence and quantum
correlations in bipartite systems
- Authors: Indrajith V. S, R. Muthuganesan and R. Sankaranarayanan
- Abstract summary: We study quantum coherence of bipartite state from the perspective of weak measurement.
The is being illustrated by computing coherence for the well-known Bell diagonal and Wener states.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this article, we study quantum coherence of bipartite state from the
perspective of weak measurement, which generalizes the notion of coherence
relative to measurement. The is being illustrated by computing coherence for
the well-known Bell diagonal and Wener states. We have also extended our
investigation on quantum correlation measure and uncertainty relation in the
weak measurement regime.
Related papers
- Theoretical investigation of the relations between quantum decoherence and weak-to-strong measurement transition [3.8900569098289206]
We focus on the interplay between quantum decoherence and the transition from weak to strong measurement.
Our findings reveal that both phenomena can be effectively characterized by a universal transition factor intricately linked to the coupling between the system and the measurement apparatus.
The analysis presented can clarify the mechanism behind the relations of quantum decoherence to the weak measurement and weak-to-strong measurement transition.
arXiv Detail & Related papers (2024-04-30T12:17:52Z) - Effect of the readout efficiency of quantum measurement on the system entanglement [44.99833362998488]
We quantify the entanglement for a particle on a 1d quantum random walk under inefficient monitoring.
We find that the system's maximal mean entanglement at the measurement-induced quantum-to-classical crossover is in different ways by the measurement strength and inefficiency.
arXiv Detail & Related papers (2024-02-29T18:10:05Z) - Enhanced Entanglement in the Measurement-Altered Quantum Ising Chain [46.99825956909532]
Local quantum measurements do not simply disentangle degrees of freedom, but may actually strengthen the entanglement in the system.
This paper explores how a finite density of local measurement modifies a given state's entanglement structure.
arXiv Detail & Related papers (2023-10-04T09:51:00Z) - 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) - Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom.
We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
arXiv Detail & Related papers (2023-03-13T13:06:40Z) - Entanglement and Quantum Correlation Measures from a Minimum Distance
Principle [0.0]
Entanglement, and quantum correlation, are precious resources for quantum technologies implementation based on quantum information science.
We derive an explicit measure able to quantify the degree of quantum correlation for pure or mixed multipartite states.
We prove that our entanglement measure is textitfaithful in the sense that it vanishes only on the set of separable states.
arXiv Detail & Related papers (2022-05-14T22:18:48Z) - Entanglement swapping and quantum correlations via Elegant Joint
Measurements [5.252277280918264]
We use hyper-entanglement to experimentally realize deterministic entanglement swapping based on quantum Elegant Joint Measurements.
We report measurement fidelities no smaller than $97.4%$.
arXiv Detail & Related papers (2022-03-30T11:09:20Z) - Finite resolution ancilla-assisted measurements of quantum work
distributions [77.34726150561087]
We consider an ancilla-assisted protocol measuring the work done on a quantum system driven by a time-dependent Hamiltonian.
We consider system Hamiltonians which both commute and do not commute at different times, finding corrections to fluctuation relations like the Jarzynski equality and the Crooks relation.
arXiv Detail & Related papers (2021-11-30T15:08:25Z) - Quantum coherence and correlation measures based on affinity [1.3907460999698045]
Coherence and correlation are key features of the quantum system.
We identify an affinity-based metric to quantify closeness between two states.
We propose a bipartite quantum correlation measure based on the affinity metric.
arXiv Detail & Related papers (2020-03-29T17:03:52Z) - Direct estimation of quantum coherence by collective measurements [54.97898890263183]
We introduce a collective measurement scheme for estimating the amount of coherence in quantum states.
Our scheme outperforms other estimation methods based on tomography or adaptive measurements.
We show that our method is accessible with today's technology by implementing it experimentally with photons.
arXiv Detail & Related papers (2020-01-06T03:50:42Z)
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.