Kerr nonlinear coupler and entanglement

Leoński, W.; Miranowicz, Adam

doi:10.1088/1464-4266/6/3/007

Cited by 101 publications

(108 citation statements)

References 33 publications

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“…For that time the energy of the system is conserved and the phase factor related to the presence of nonlinearities is dominant. It is completely different mechanism than that presented in the system discussed in [12] where these two factors, pumping and phase evolution, act simultaneously.…”

Section: Resultsmentioning

confidence: 83%

“…Moreover, other mentioned here Bell states could be produced but with slightly less accuracy. The situation resembles that discussed in [12] but here we deal with the system excited by pulses instead of continuous external field with constant amplitude. For the case discussed here, we have additional parameter, time between two subsequent pulses T , that can be applied for tuning the system.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Kicked nonlinear quantum scissors and entanglement generation

Kowalewska-Kudłaszyk¹,

Leoński²,

Nguyen³

et al. 2014

Phys. Scr.

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We consider a nonlinear coupler with two Kerr-like oscillators mutually coupled by continuous linear interaction and excited by a series of ultra-short external pulses. We show that the system behaves as nonlinear quantum scissors. It evolves such a way that it can be treated as qubit-qubit system. We derive analytic formulas for the probabilities of the states involved in the system's evolution and show that they differ from those already discussed in the literature and corresponding to the continuously excited models. Moreover, for model discussed here, maximally entangled Bell states can be generated with high efficiency.

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Kicked nonlinear quantum scissors and entanglement generation

Kowalewska-Kudłaszyk¹,

Leoński²,

Nguyen³

et al. 2014

Phys. Scr.

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“…Systems with such symmetries are thus strong candidates for studying NLD in the quantum regime. Moreover, it was suggested that engineering of NLD might be feasible [29][30][31]. Exploiting the reduced disentanglement in systems with NLD is a promising path towards realizing entanglement based technologies.…”

Section: Discussionmentioning

confidence: 99%

“…Among these are carbon-based nanomechanical systems like graphene and carbon nanotubes [25,27,28]. Additionally, there have been reports of inducing nonlinear dissipation in optome- * Electronic address: andreas.isacsson@chalmers.se chanical systems [29,30], and suggestions for possible emergence of NLD in solid state quantum devices [31].…”

Section: Introductionmentioning

confidence: 99%

Entanglement dynamics of quantum oscillators nonlinearly coupled to thermal environments

Voje

Isacsson

2015

Phys. Rev. A

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We study the asymptotic entanglement of two quantum harmonic oscillators nonlinearly coupled to an environment. Coupling to independent baths and a common bath are investigated. Numerical results obtained using the Wangsness-Bloch-Redfield method are supplemented by analytical results in the rotating wave approximation. The asymptotic negativity as function of temperature, initial squeezing and coupling strength, is compared to results for systems with linear system-reservoir coupling. We find that due to the parity conserving nature of the coupling, the asymptotic entanglement is considerably more robust than for the linearly damped cases. In contrast to linearly damped systems, the asymptotic behavior of entanglement is similar for the two bath configurations in the nonlinearly damped case. This is due to the two-phonon system-bath exchange causing a supression of information exchange between the oscillators via the bath in the common bath configuration at low temperatures.

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“…Even in this case we can obtain several interesting results [7][8][9]. Here we extend the formalism given in [10] to a more realistic case, when the laser width is taken into account and discuss a simple quantum information application of Kerr nonlinearities, namely for generation of entangled optical qubits from classical light. We consider here a simple model including two quantum nonlinear oscillators located inside one cavity.…”

mentioning

confidence: 99%