Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:quant-ph/0602206 · Journal of Physics B Atomic Molecular and Optical Physics

Sudden death of entanglement of two Jaynes–Cummings atoms

Muhammed Yönaç, Ting Yu, Joseph H. Eberly

Published Jul 24, 2006• 320 citations
arXivHTMLPDF

Abstract

We investigate entanglement dynamics of two isolated atoms, each in its own Jaynes–Cummings cavity. We show analytically that initial entanglement has an interesting subsequent time evolution, including the so-called sudden death effect.
DOI
10.1088/0953-4075/39/15/s09

Related papers

Time evolution and transfer of entanglement between an isolated atom and a Jaynes–Cummings atom

Zhi-Jian Li, Jun‐Qi Li, Yan-Hong Jin +1 more

We investigate the entanglement dynamics of two space-separated atoms, one of them in Jaynes–Cummings cavity and the other isolated completely. We show analytically that initial entanglement has an interesting subsequent time evolution and transfer, including the so-called sudden death effect. A little inconsistency of concurrence and negativity is indicated qualitatively to measure the two-qubit states.

Journal of Physics B Atomic Molecular and Optical Physics•Aug 21, 2007•44 citations

A NEW FEATURE ON THE SUDDEN DEATH OF ENTANGLEMENT

Xue‐Qun Yan

Based on the exactly analytic solution obtained of the intensity-dependent Jaynes–Cummings model for a certain class of initial entangled mixed states, we explore the time evolution of the entanglement between two atoms, initially non-locally correlated and separately interacting with two distinct cavities. The results show that entanglement sudden death is dependent on the different initial states of atoms, and the length of the time interval for the zero entanglement is invariant for a certain class of initial mixed states.

Modern Physics Letters B•Oct 10, 2008•1 citation

DYNAMICAL SUPPRESSION OF ENTANGLEMENT SUDDEN DEATH IN A JAYNES–CUMMINGS MODEL EXTENDED

Xue‐Qun Yan

The Jaynes–Cummings model extended by the inclusion of mode structure and atomic motion is an elementary model that describes the interaction between a single atom and electromagnetic pulse. Based on the model, we explore the time evolution of the entanglement between two atoms, initially non-locally correlated and crossing separately two distinct cavities. Our results show that this model suggests a strategy to fight against the so-called entanglement sudden death, and in the situation resurrection of the original entanglement value occurs periodically and the entanglement will remain at the original value for a finite duration.

Modern Physics Letters B•Jan 20, 2009•0 citations

Entanglement dynamics of W-like states within the framework of triple Jaynes–Cummings model

Zhong‐Xiao Man, Yun‐Jie Xia, Nguyen Ba An

Entanglement dynamics of two atomic W-like states is studied within the framework of a triple Jaynes–Cummings model. It is shown that the two states, though initially being equivalent under simple local operations and thus having the same amounts of pairwise entanglements, undergo qualitatively different evolutions. Namely, one of them may suffer from the so-called entanglement sudden death depending on the parameters, while the other one does not for whatever parameters.

Journal of Modern Optics•May 10, 2009•9 citations

Sudden Death of Entanglement of two Quantum Dots Embedded in its Own Cavity

S. Sánchez-Sánchez, José Javier Sánchez Mondragón, F. R. Castillo Soria +2 more

Entanglement of quantum systems is a key aspect to understanding the dynamics and behavior of mixed systems (density matrix) as bipartite quantum bits (qubits).Thus we need to have a reliable and accurate way to measure the entanglement degree of the system, i.e., how it evolves, so that raises several approaches to meet these demands.A quantifiable measure widely used is the "entanglement of formation" of a mixed state, defined as the minimum number required of "singlets" to create a set of pure states that represents the density matrix of the system.In this paper we consider a system of two semiconductor quantum dots embedded in its own cavity and coupled to the internal mode field of cavity type Jaynes-Cummings.The entanglement between the two quantum dots is investigated, and we show analytically that entanglement has very interesting, effects such as time evolution including the effect called sudden death.

Research in Computing Science•Dec 31, 2017•0 citations

Control of entanglement sudden death by Kerr medium

Qiang Zheng, Xiaoping Zhang, Zhongzhou Ren

The entanglement dynamics of system, where atoms A and B interact with single mode cavity fields a and b respectively, is studied. The interaction between atom A and cavity a may be described by using the typical Jaynes–Cummings model, while that between the atom B and cavity b filled with a Kerr medium is of a two-photon process. For a certain initial atom entanglement state, there is an entanglement sudden death effect between the two atoms. The Kerr medium in the cavity b can effectively prevent the undesirable entanglement sudden death from occurring. Also, from the viewpoint of the population dynamics, we discuss why the Kerr medium can do so.

Chinese Physics B•Oct 1, 2008•15 citations
Based on the exactly analytic solution obtained of the intensity-dependent Jaynes–Cummings model for a certain class of initial entangled mixed states, we explore the time evolution of the entanglement between two atoms, initially non-locally correlated and separately interacting with two distinct cavities. The results show that entanglement sudden death is dependent on the different initial states of atoms, and the length of the time interval for the zero entanglement is invariant for a certain class of initial mixed states.
The Jaynes–Cummings model extended by the inclusion of mode structure and atomic motion is an elementary model that describes the interaction between a single atom and electromagnetic pulse. Based on the model, we explore the time evolution of the entanglement between two atoms, initially non-locally correlated and crossing separately two distinct cavities. Our results show that this model suggests a strategy to fight against the so-called entanglement sudden death, and in the situation resurrection of the original entanglement value occurs periodically and the entanglement will remain at the original value for a finite duration.
Entanglement of quantum systems is a key aspect to understanding the dynamics and behavior of mixed systems (density matrix) as bipartite quantum bits (qubits).Thus we need to have a reliable and accurate way to measure the entanglement degree of the system, i.e., how it evolves, so that raises several approaches to meet these demands.A quantifiable measure widely used is the "entanglement of formation" of a mixed state, defined as the minimum number required of "singlets" to create a set of pure states that represents the density matrix of the system.In this paper we consider a system of two semiconductor quantum dots embedded in its own cavity and coupled to the internal mode field of cavity type Jaynes-Cummings.The entanglement between the two quantum dots is investigated, and we show analytically that entanglement has very interesting, effects such as time evolution including the effect called sudden death.
The entanglement dynamics of system, where atoms A and B interact with single mode cavity fields a and b respectively, is studied. The interaction between atom A and cavity a may be described by using the typical Jaynes–Cummings model, while that between the atom B and cavity b filled with a Kerr medium is of a two-photon process. For a certain initial atom entanglement state, there is an entanglement sudden death effect between the two atoms. The Kerr medium in the cavity b can effectively prevent the undesirable entanglement sudden death from occurring. Also, from the viewpoint of the population dynamics, we discuss why the Kerr medium can do so.