Results 61 to 70 of about 853 (152)

Entanglement sudden death and sudden birth in two uncoupled spins [PDF]

Physica Scripta, 2009
We investigate the entanglement evolution of two qubits interacting with a common environment trough an Heisenberg XX mechanism. We reveal the possibility of realizing the phenomenon of entanglement sudden death as well as the entanglement sudden birth acting on the environment.
FERRARO, Elena, NAPOLI, Anna, GUCCIONE, Marina, MESSINA, Antonino   +3 more
openaire   +2 more sources

Property of various correlation measures of open Dirac system with Hawking effect in Schwarzschild space–time

Physics Letters B, 2015
We explore the performance of various correlation measures for open Dirac system with Hawking effect in Schwarzschild space–time. Our results indicate that the impact of Hawking effect on physical accessible entanglement is weaker than that of ...
Juan He, Shuai Xu, Yang Yu, Liu Ye
doaj   +1 more source

Do maximally entangled states always have an advantage over non-maximally entangled states in Schwarzschild black hole?

European Physical Journal C: Particles and Fields
It is generally believed that quantum entanglement in the maximally entangled states is greater than quantum entanglement in the non-maximally entangled states under a relativistic setting.
Shu-Min Wu, Si-Han Li
doaj   +1 more source

Dynamics of quantum correlations in four-qubit XXZ Heisenberg model with external magnetic field

Results in Physics
In this paper we argue about the quantum correlation (quantum entanglement and geometric quantum discord) in four-qubit XXZ Heisenberg Model. Here, the influence of uniform magnetic field on the dynamics of quantum correlation in cases of the ...
Su-Bok Ri, Gwang-Jin Kim, Ha Kim, Hyok Pak   +3 more
doaj   +1 more source

Asymptotic Entanglement Sudden Death in Two Atoms with Dipole-Dipole and Ising Interactions Coupled to a Radiation Field at Non-Zero Detuning. [PDF]

Entropy (Basel), 2021
Sadiek G, Al-Dress W, Shaglel S, Elhag H.   +3 more
europepmc   +1 more source

Decoherence and disentanglement of qubits detecting scalar fields in an expanded spacetime

European Physical Journal C: Particles and Fields, 2017
We consider Unruh–Wald qubit detector model adopted for the far future region of an exactly solvable $$1+1$$ 1 + 1 dimensional scalar field theory in a toy model of Robertson–Walker expanding spacetime.
Yujie Li, Yue Dai, Yu Shi
doaj   +1 more source

Control of Sudden Death of Entanglement by Transient Effects

Communications in Theoretical Physics, 2011
We investigate the properties of entanglement between an isolated atom and a Jaynes—Cummings atom in the presence of transient effects. These effects are due to the modulation of the atom-field coupling whose explicit time-dependence is considered for the case of the linear sweep.
openaire   +2 more sources

Dynamics of entanglement of separable three-qubit states in the Tavis — Cummings multiphoton model

Вестник Самарского университета: Естественнонаучная серия
In this work we study in detail the generalized Tavis — Cummings model, in which three identical qubits are trapped in a lossless single-mode resonator and interact resonantly with the quantized thermal electromagnetic field of this resonator by means of
A. R. Bagrov, E. K. Bashkirov
doaj   +1 more source

Harnessing Quantum Entanglement and Fidelity in Hydrogen Atoms: Unveiling Dynamics Under Dephasing Noise

Applied Sciences
We investigate the quantum dynamics of entanglement and fidelity in the hyperfine structure of hydrogen atoms under dephasing noise, modeled via the Lindblad master equation.
Kamal Berrada, Smail Bougouffa
doaj   +1 more source

Dynamics of a two-qubit Tavis-Cummings model in the presence of an Ising-type interaction between qubits

Компьютерная оптика
In this paper, we investigated the dynamics of entanglement of two qubits interacting non-resonantly with the thermal field of a one-mode lossless resonator, taking into account the Ising-type direct interaction between qubits.
E.K. Bashkirov
doaj   +1 more source