Distillation of free entanglement from bound entangled states using weak measurements

Baghbanzadeh, Sima; Rezakhani, A. T.

doi:10.1103/physreva.88.062320

Cited by 12 publications

(5 citation statements)

References 54 publications

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“…criterion is in vain, there can exist entangled states that are positive after this operation, but such states are not distillable [9]. Recently, a transformation in the type of its entanglement from bound (free) to free (bound) has been demonstrated [10][11][12]. In the bipartite systems case, both unitary and nonunitary evolution of bound entangled states may give rise to the birth of free entanglement [13,14].…”

mentioning

confidence: 99%

Distillability sudden death in two-qutrit systems with external magnetic field and Dzyaloshinskii-Moriya interaction due to decoherence

Guo¹,

Mao-Fa²,

Zhang³

et al. 2014

EPL

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Recently, Mazhar Ali (Phys. Rev. A, 81 (2010) 042303 and J. Phys. B, 43 (2010) 045504) showed the phenomenon of distillability sudden death (DSD) in qutrit-qutrit systems under amplitude damping. In this paper, the phenomenon of distillability sudden death in twoqutrit systems which are in the presence of the external magnetic field and Dzyaloshinskii-Moriya (DM) interaction under decoherence has been investigated. With the help of the realignment criterion, we show that certain initial prepared free entangled states may become bound entangled states in a finite time. Moreover, the effects of the external magnetic field strength and the DM interaction parameter, as well as the intrinsic decoherence parameter on the possibility of DSD in our model have been studied in detail.

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mentioning

confidence: 99%

Distillability sudden death in two-qutrit systems with external magnetic field and Dzyaloshinskii-Moriya interaction due to decoherence

Guo¹,

Mao-Fa²,

Zhang³

et al. 2014

EPL

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“…Derkacz and Jakóbczyk demonstrated the revivals of distillable entanglement for two identical three-level atoms coupled to the common vacuum [31][32][33]. Besides, Baghbanzadeh et al [34] discussed a quantum phase transition can be accompanied by a change from bound entanglement to free entanglement under decoherence channels and demonstrated distillation of free entangled states from bound entangled states by using weak measurements [35].…”

Section: Introductionmentioning

confidence: 98%

“…Recently a transformation between bound entanglement and free entanglement has been demonstrated under differen decoherence channels [27][28][29]. With these previous studies in mind, we naturally ask the question does there exist distillability sudden birth after a specific family of Horodecki states undergoes distillability sudden death?…”

Section: Introductionmentioning

confidence: 99%

Distillability sudden death and sudden birth in a two-qutrit system under decoherence at finite temperature

Guo

Mao-Fa

Wang

et al. 2016

Quantum Inf Process

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Distillability sudden death and sudden birth in a two-qutrit system locally subject to amplitude damping channel at a finite temperature have been studied in detail. By using the negativity and the realignment criterion, the results show that certain initially prepared free entangled states under amplitude damping channel at a finite temperature may become bound entangled or separable states in a finite time. Moreover, we have also demonstrated initially prepared bound entangled or separable states may also become distillable entangled states in a finite time.

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“…Some recent studies found that bound entangled states can be used in quantum information theory with some free entanglement [18][19][20][21]. After that, a variety of research works have been conducted on dynamical analysis, distillation, and activation of bound entangled states [22][23][24][25][26]. These research works involve a variety of methods for detecting and measuring entanglements.…”

Section: Introductionmentioning

confidence: 99%

Effect of quantum information scrambling on bound entangled states

Sinha

2024

Phys. Scr.

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Spreading information in physical systems is a common phenomenon. However, when the information is quantum in nature, tracking, describing, and quantifying the information is a challenging task. Quantum information scrambling defines the quantum information propagating chaotically over the physical system. This article describes the effect of quantum information scrambling on bound entangled states. A bound entangled state is a particular type of entangled state that carries noisy entanglement. The distillation of this type of entangled state is very difficult. In recent times, the usefulness of these states has been depicted in different applications. The outcome of this study exhibits that quantum information scrambling develops entanglement in the separable portion of the bound entangled states. Although quantum information scrambling reduces entanglement, the study pointed out that quantum information scrambling plays a significant role in activating the bound entangled states by introducing a certain amount of approximately stable entanglement.

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Distillation of free entanglement from bound entangled states using weak measurements

Cited by 12 publications

References 54 publications

Distillability sudden death in two-qutrit systems with external magnetic field and Dzyaloshinskii-Moriya interaction due to decoherence

Distillability sudden death in two-qutrit systems with external magnetic field and Dzyaloshinskii-Moriya interaction due to decoherence

Distillability sudden death and sudden birth in a two-qutrit system under decoherence at finite temperature

Effect of quantum information scrambling on bound entangled states

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