A trapped ion in an optomechanical system: entanglement dynamics

Nadiki, M. Hassani; Tavassoly, M. K.; Yazdanpanah, N.

doi:10.1140/epjd/e2018-80778-6

Cited by 10 publications

(4 citation statements)

References 39 publications

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“…Optomechanical systems have potential ability to provide explicit evidences on quantum features in macroscopically arrangement [39]. In cavity optomechanical systems, the optical cavity with one movable mirror is concerned with mechanical effects caused by light through radiation pressure [40][41][42][43]. OMC includes a coupling between photons and phonons, so that OMCs are useful in quantum information processing in order to combine the advantages of different physical systems in a unit architecture [44].…”

Section: Introductionmentioning

confidence: 99%

Distributed entangled state production by using quantum repeater protocol

Ghasemi,

Tavassoly

2021

Preprint

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We consider entangled state production utilizing a full optomechanical arrangement, based on which we create entanglement between two far three-level V-type atoms using a quantum repeater protocol. At first, we consider eight identical atoms (1, 2, • • • , 8), while adjacent pairs (i, i + 1) with i = 1, 3, 5, 7 have been prepared in entangled states and the atoms 1, 8 are the two target atoms. The three-level atoms (1,2,3,4) and (5,6,7,8) distinctly become entangled with the system including optical and mechanical modes by performing the interaction in optomechanical cavities between atoms (2,3) and (6,7), respectively. Then, by operating appropriate measurements, instead of Bell state measurement which is a hard task in practical works, the entangled states of atoms (1,4) and (5,8) are achieved. Next, via interacting atoms (4,5) of the pairs (1,4) and (5,8) and operating proper measurement, the entangled state of target atoms (1,8) is obtained. In the continuation, entropy and success probability of the produced entangled state are then evaluated. It is observed that the time period of entropy is increased by increasing the mechanical frequency (ω M ) and by decreasing optomechanical coupling strength to the field modes (G). Also, in most cases, the maximum of success probability is increased by decreasing G and via decreasing ω M .

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Section: Introductionmentioning

confidence: 99%

Distributed entangled state production by using quantum repeater protocol

Ghasemi,

Tavassoly

2021

Preprint

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“…In addition, the internal states of ionic systems can be precisely manipulated using laser light, and can be measured with basically 100% efficiency [29]. Due to the mentioned advantages, various studies on ions have been done; for instance, one may refer to the generation of entanglement with hundreds of trapped ions [30], designing quantum computer with trapped atomic ions [31] and building a quantum simulator using trapped ions [32] (for more information see also [33][34][35][36]). And about using the OMCs in our paper we preliminary recall that, entanglement generation in the presence of OMCs is, in general, an attractive topic (see [37][38][39]).…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, the interaction between a two-level trapped atomic ion inside a single-mode optical cavity in the Lamb-Dick regime as well as the first vibrational sideband in the rotating wave approximation has been previously introduced [54,55]. Also, a system including a two-level trapped atomic ion interacting with an OMC has been studied in [34]. The interaction between two trapped atomic ions (2,3) in an OMC is described by the Hamiltonian Ĥ = Ĥ0 + Ĥ1 ( = 1), where…”

Section: Introductionmentioning

confidence: 99%

Distributing entangled state using quantum repeater protocol: Trapped atomic ions in optomechanical cavities

Ghasemi

Tavassoly

2020

Physics Letters A

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Distribution of the entangled state of trapped atomic ions to long distance using quantum repeater protocol is considered. Indeed, the long distance is divided into short parts, and then using entanglement generation and entanglement swapping techniques in optomechanical cavities, the entanglement is distributed. To do the task, we perform interaction between trapped atomic ions in optomechanical cavities, operate proper measurements on trapped ions and also make Bell state measurement as a well-known way to swap the entanglement. Accordingly, the entanglement is distributed between target ions with satisfactory values of success probability and entanglement degree. The effects of detuning and amplitude of pump laser on the entanglement and success probability are evaluated. The fluctuations of entanglement and success probability are decreased by increasing of detuning. Via increasing the amplitude of pump laser, the maxima of entanglement are repeated more times and success probability undergoes the collapse-revival phenomenon.

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“…The quantum interactions can be modeled by Jaynes-Cummings model (JCM) [26][27][28][29][30][31] as well as Tavis-Cummings model (TCM) [32,33]. Based on these models, the interactions can be performed in optomechanical cavity [34,35], instead of the usually used optical cavity. Nowadays, cavity optomechanics is a noticeable field of physics with its relevant characteristics, namely, the interaction between a mechanical resonator and radiation pressure of an optical cavity field which attracted a lot of attention [36,37].…”

Section: Introductionmentioning

confidence: 99%

Quantum repeater protocol using an arrangement of QED–optomechanical hybrid systems

Ghasemi

Tavassoly

2019

J. Opt. Soc. Am. B

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In this paper we consider the quantum repeater protocol for distributing the entanglement to two distant three-level atoms. In this protocol, we insert six atoms between two target atoms such that the eight considered atoms are labeled by 1, 2, • • • 8, while only each two adjacent atoms (i, i + 1) with i = 1, 3, 5, 7 are entangled. Initially, the separable atomic pair states (1,4) and (5,8) become entangled by performing interaction between atoms (2,3) and (6,7) in two optomechanical cavities, respectively. Then, via performing appropriate interaction between atoms (4,5) in an optical cavity quantum electrodynamics (QED) approach, the target atoms (1,8) are finally become entangled. Throughout this investigation, the effects of mechanical frequency and optomechanical coupling strength to the field modes on the produced entanglement and the related success probability are evaluated. It is shown that, the time period of produced entanglement can be developed by increasing the mechanical frequency. Also, maximum of success probability of atoms (1,8) is increased by decreasing the optomechanical coupling strength to the field modes in most cases.

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A trapped ion in an optomechanical system: entanglement dynamics

Cited by 10 publications

References 39 publications

Distributed entangled state production by using quantum repeater protocol

Distributed entangled state production by using quantum repeater protocol

Distributing entangled state using quantum repeater protocol: Trapped atomic ions in optomechanical cavities

Quantum repeater protocol using an arrangement of QED–optomechanical hybrid systems

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