Entanglement detection in a coupled atom-field system via quantum Fisher information

Mirkhalaf, Safoura S.; Smerzi, Augusto

doi:10.1103/physreva.95.022302

Cited by 15 publications

(7 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, in the classical limit the accessible phase space may undergo a progressive regular-to-chaotic transition upon varying the energy E and/or the coupling γ [73,98]. Its bipartite [69,[99][100][101][102], multipartite entanglement [69,[103][104][105][106][107][108] and scrambling dynamics [69,[109][110][111] have been intensively explored.…”

Section: F the Dicke Modelmentioning

confidence: 99%

See 1 more Smart Citation

Bridging entanglement dynamics and chaos in semiclassical systems

Lerose,

Pappalardi

2020

Preprint

View full text Add to dashboard Cite

It is widely recognized that entanglement generation and dynamical chaos are intimately related in semiclassical models. In this work, we propose a unifying framework which directly connects the bipartite and multipartite entanglement growth to the quantifiers of classical and quantum chaos. In the semiclassical regime, the dynamics of the von Neumann entanglement entropy, the spin squeezing, the quantum Fisher information and the out-of-time-order square commutator are governed by the divergence of nearby phase-space trajectories via the local Lyapunov spectrum, as suggested by previous conjectures in the literature. Analytical predictions are confirmed by detailed numerical calculations for two paradigmatic models, relevant in atomic and optical experiments, which exhibit a regular-to-chaotic transition: the quantum kicked top and the Dicke model.

show abstract

Section: F the Dicke Modelmentioning

confidence: 99%

“…Then, in Sec.VII B we compare our analytical predictions with exact numerics in finite-size systems only for the entanglement entropy dynamics. Note that the QFI and the square commutator have been explored in the same context recently [69,[103][104][105][106][107][108][109][110][111].…”

Section: The Dicke Modelmentioning

confidence: 99%

Bridging entanglement dynamics and chaos in semiclassical systems

Lerose,

Pappalardi

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…However, by itself, it fails to give information about the number of parties involved in the entanglement. Another measure called the quantum Fisher information, which is an indisposable part of modern quantum metrology, gives a lower bound on the number of parties involved in the entanglement [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Controlled generation of genuine multipartite entanglement in Floquet Ising spin models

2019

View full text Add to dashboard Cite

We propose a method for generation of genuine multipartite entangled states in a short-range Ising spin chain with periodic global pulses of magnetic field. We consider an integrable and a non-integrable Floquet system that are periodic in time and have constant quasi-energy gaps with degeneracies. We start with all spins polarized along one direction and show that they evolve into states with high entanglement by calculating the average entanglement entropy and geometric measure of entanglement. We show that some of these states have a high number of parties involved in the entanglement by calculating the quantum Fisher information. Such controlled generation of multipartite entanglement has potential applications in quantum information processing.

show abstract

“…Moreover, quantum Fisher information in non-inertial frames has been investigated for different systems, such as the performance of quantum Fisher information under the Unruh-Hawking effect in the context of relativistic quantum information theory 24 , the dynamic of the teleported quantum Fisher information 25 , and the Unruh acceleration effect on the precision of parameter estimation for a general two-qubit system 26 . The existence of the maximal quantum information matrix in multi-parameter quantum estimation 27 and entanglement detection have been discussed extensively 28,29 . The dynamics of quantum Fisher information in the two-level system coupled to a single bosonic reservoir 30,31 and multiple bosonic reservoirs 32,33 has been discussed.…”

Section: Introductionmentioning

confidence: 99%

Quantum Fisher information of atomic system interacting with a single cavity mode in the presence of Kerr medium

Zidan

Abdel-Hameed

Metwally

2019

Sci Rep

View full text Add to dashboard Cite

The quantum Fisher information of an atomic system interacting with a single cavity mode in the presence of Kerr medium is discussed. It is shown that quantum Fisher information for an initial separable atomic system is larger than that depicted for the initial entangled atomic system. For initial vacuum state of the cavity mode, the quantum Fisher information with respect to the Kerr medium and the phase decoherence parameter is larger than that displayed for the detuning parameter. Both phase decoherence and Kerr medium have the same effect on the decay of quantum Fisher information, while they have an opposite effect on its maximum values.

show abstract

Entanglement detection in a coupled atom-field system via quantum Fisher information

Cited by 15 publications

References 45 publications

Bridging entanglement dynamics and chaos in semiclassical systems

Bridging entanglement dynamics and chaos in semiclassical systems

Controlled generation of genuine multipartite entanglement in Floquet Ising spin models

Quantum Fisher information of atomic system interacting with a single cavity mode in the presence of Kerr medium

Contact Info

Product

Resources

About