Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

Rafeie, M.; Tavassoly, M. K.; Kheirabady, M. Setodeh

doi:10.1002/andp.202100455

Cited by 13 publications

(6 citation statements)

References 61 publications

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“…It should be noted that, the influence of cavity modes has been removed by a unitary transformation and via considering some other assumptions, so we have only contributions from atoms 1-4, and therefore, we have to perform atomic BSM. Further details about BSM and its applications can be found in the relevant literature [46,47].…”

Section: H H H H a A S H T G A S As S S Imentioning

confidence: 99%

Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation

Setodeh Kheirabady,

Tavassoly,

Rafeie

et al. 2024

Commun. Theor. Phys.

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Quantum resources such as entanglement and coherence are the holy grail for modern quantumtechnologies. Although the unwanted environmental effects tackle quantum information processing tasks, {\color{blue}suprisingly} these key quantum resources may be protected and even enhanced by the implementation of some special hybrid open quantum systems. {\color{blue} Here, we aim to show that how a dissipative atom-cavity-system can be accomplished to generate enhanced quantum resources.}To do so, we consider a couple of dissipative cavities, where each one contains two effective two-level atoms interacting with a single-mode cavity field.{\color{blue} In practical applications, a classical laser field may be applied to drive each atomic subsystem. After driving the system, a Bell-state measurement (BSM) is performed on the output of the system to quantify the entanglement and coherence. }The obtained results reveal that the remote entanglement and coherence between the atoms existing inside the two distant cavities not only enhanced, but can be stabilized, even under the action of dissipation. In contrast, the local entanglement between two atoms inside each dissipative cavity attenuates due to the presence of unwanted environmental effects. Nevertheless, the local coherence may show the same behavior as the remote coherence. {\color{blue}Besides, the system provides the steady state entanglement in various interaction regimes, particularly in the strong atom-cavity coupling and with the relatively large detuning. More interestingly, our numerical analyses demonstrate that the system may show memory effect due top the fact that the death and revival of entanglement take place during the interaction.} Our proposed model may find potential applications for the implementation of long distance quantum networks. In particular, it facilitates the distribution of quantum resources between the nodes of large-scale quantum networks for secure communication. \\

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Section: H H H H a A S H T G A S As S S Imentioning

confidence: 99%

Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation

Setodeh Kheirabady,

Tavassoly,

Rafeie

et al. 2024

Commun. Theor. Phys.

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“…Quantum entanglement, a particular form of quantum correlation, has garnered extensive investigation across diverse quantum systems. [17][18][19][20] It offers a profound insight into the foundational structure of quantum mechanics, serving as the principal demarcation between macroscopic (classical) and microscopic (quantum) systems. [21][22][23] Moreover, quantum entanglement has evolved into an indispensable asset in the realm of quantum information processing, where it underpins the remarkable computational speed of quantum computing and the unequivocal security of quantum communication.…”

Section: Introductionmentioning

confidence: 99%

Quantum correlations and entanglement in coupled optomechanical resonators with photon hopping via Gaussian interferometric power analysis

Lahlou,

Maroufi,

Daoud

2024

Chinese Phys. B

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Quantum correlations that surpass entanglement are of great importance in the realms of quantum information processing and quantum computation. Essentially, for quantum systems prepared in pure states, it is difficult to differentiate between quantum entanglement and quantum correlation. Nonetheless, this indistinguishability is no longer holds for mixed states. To contribute to a better understanding of this differentiation, we have explored a simple model for both generating and measuring these quantum correlations. Our study concerns two macroscopic mechanical resonators placed in separate Fabry-Perot cavities, coupled through the photon hopping process. this system offers a comprehensively way to investigate and quantify quantum correlations beyond entanglement between these mechanical modes. The key ingredient in analyzing quantum correlation in this system is the global covariance matrix. It forms the basis for computing two essential metrics: the Logarithmic Negativity ($E_\mathcal{N}^m$) and the Gaussian Interferometric Power ($\mathcal{P}_{\mathcal{G}}^{m}$). These metrics provide the tools to measure the degree of quantum entanglement and quantum correlations, respectively. Our study reveals, that the Gaussian Interferometric Power ($\mathcal{P}_{\mathcal{G}}^{m}$) proves to be a more suitable metric for characterizing quantum correlations among the mechanical modes in an optomechanical quantum system, particularly in scenarios featuring resilient photon hopping.

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“…[13][14][15] for different purposes. In recent decades, to generate the non-classical characteristic, hybridizing quantum systems has attracted considerable interest [16][17][18][19]. The blockade effect is a purely quantum mechanical phenomenon without any classical counterpart, for instance, the photon blockade effect represents an effect that presence of one photon prevents the second one to entrance [20,21].…”

Section: Introductionmentioning

confidence: 99%

Steady state quantum statistics of a hybrid optomechanical-ferromagnet system: photon and magnon blockade

Kheirabady¹,

Tavassoly²

2023

J. Phys. B: At. Mol. Opt. Phys.

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Magnon and photon blockade implementation and manipulation have significant practical applications in quantum information processing and quantum metrology due to their tight relations to single-photon and -magnon source devices. In this paper, we propose an experimentally feasible hybrid scheme for the dynamical description of the tripartite interacting system consisting of magnon and phonon modes with photons in an optomechanical system, from which we aim to explore the quantum statistics, as well as the magnon and photon blockade phenomenon. To achieve the purpose, the dissipative solution of the system is obtained with the help of the Lindblad master equation. Via employing the equal-time second-order correlation function and using the steady state solution of the system, the statistics and blockade effects of magnon and photon are analyzed and also their dependence on the parameters involved in the system are discussed. Utilizing feasible parameters, our simulations illustrate that, sub-Poissonian behavior and therefore, blockade of magnon and photon are simultaneously achieved. More importantly, the mentioned blockade effects can be obtained in a range of parameters (and not with specific) which makes our proposal easy to access, experimentally. Considering the above realizations, the introduced scheme opens up a pathway to design single-magnon and - photon generators, which are of crucial importance in advanced quantum science and technologies.

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Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

Cited by 13 publications

References 61 publications

Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation

Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation

Quantum correlations and entanglement in coupled optomechanical resonators with photon hopping via Gaussian interferometric power analysis

Steady state quantum statistics of a hybrid optomechanical-ferromagnet system: photon and magnon blockade

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