Entanglement creation with negative index metamaterials

Siomau, Michael; Kamli, Ali A.; Моисеев, С. А.; Sanders, Barry C.

doi:10.1103/physreva.85.050303

Cited by 44 publications

(25 citation statements)

References 38 publications

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“…The generation and preservation of bipartite or multipartite quantum correlations have been widely studied both theoretically [7][8][9][10][11][12][13][14][15][16][17][18][19][20] and experimentally [21][22][23][24][25][26] in recent years. Usually, people use of methods to create entanglement either indirect coupled quantum systems or direct coupled quantum systems [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Generation and protection of steady-state quantum correlations due to quantum channels with memory

Guo

Mao-Fa

Wang

et al. 2016

Quantum Inf Process

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We have proposed a scheme of the generation and preservation of two-qubit steady-state quantum correlations through quantum channels where successive uses of the channels are correlated. Different types of noisy channels with memory, such as amplitude damping, phase-damping, and depolarizing channels have been taken into account. Some analytical or numerical results are presented. The effect of channels with memory on dynamics of quantum correlations has been discussed in detail. The results show that, steady-state entanglement between two initial qubits without entanglement subject to amplitude damping channel with memory can be generated. The entanglement creation is related to the memory coefficient of channel µ. The stronger the memory coefficient of channel µ is, the more the entanglement creation is, and the earlier the separable state becomes the entangled state. The result also shows that there exists nonlocality in the absence of entanglement. Besides, we compare the dynamics of entanglement with that of quantum discord when a two-qubit system is initially prepared in an entangled state. We show that entanglement dynamics suddenly disappears, while quantum discord displays only in the asymptotic limit. Furthermore, two-qubit quantum correlations can be preserved at a long time in the limit of µ → 1.

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Section: Introductionmentioning

confidence: 99%

Generation and protection of steady-state quantum correlations due to quantum channels with memory

Guo

Mao-Fa

Wang

et al. 2016

Quantum Inf Process

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“…By using electromagnetically induced transparency (EIT), it was shown that the SPs have a very small attenuation. References [17,18] extended this scheme for obtaining a large crossphase modulation (CPM) and hence realizing large phase shifts or maximum entangled states of two optical pulses. However, to obtain low-loss SPs and large CPM predicted * gxhuang@phy.ecnu.edu.cn in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…However, to obtain low-loss SPs and large CPM predicted * gxhuang@phy.ecnu.edu.cn in Refs. [16][17][18], a very low room-temperature condition is needed.…”

Section: Introductionmentioning

confidence: 99%

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Surface polaritons in a negative-index metamaterial with active Raman gain

Tan

Huang

2015

Phys. Rev. A

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We propose a scheme to realize stable propagation of linear and nonlinear surface polaritons (SPs) by placing a N -type four-level quantum emitters at the interface between a dielectric and a negative-index metamaterial (NIMM). We show that in linear propagation regime SPs can acquire an active Raman gain (ARG) from a pump field and a gain doublet appears in the gain spectrum of a signal field induced by the quantum interference effect from a control field. The ARG can be used not only to completely compensate the Ohmic loss in the NIMM but also to acquire a superluminal group velocity for the SPs. We also show that in the nonlinear propagation regime a huge enhancement of the Kerr nonlinearity of the SPs can be obtained. As a result, ARG-assisted (1 + 1)-and (2 + 1)-dimensional superluminal surface polaritonic solitons with extremely low generation power may be produced based on the strong confinement of the electric field at the dielectric-NIMM interface.

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“…10 Metasurfaces can break the symmetry of quantum vacuum fluctuations and create a strong anisotropic quantum vacuum as experienced by a distant quantum emitter.…”

Section: Introductionmentioning

confidence: 99%

Quantum optical effective-medium theory and transformation quantum optics for metamaterials

Wubs

Amooghorban

Zhang

et al. 2016

Metamaterials, Metadevices, and Metasystems 2016

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While typically designed to manipulate classical light, metamaterials have many potential applications for quantum optics as well. We argue why a quantum optical effective-medium theory is needed. We present such a theory for layered metamaterials that is valid for light propagation in all spatial directions, thereby generalizing earlier work for one-dimensional propagation. In contrast to classical effective-medium theory there is an additional effective parameter that describes quantum noise. Our results for metamaterials are based on a rather general Lagrangian theory for the quantum electrodynamics of media with both loss and gain. In the second part of this paper, we present a new application of transformation optics whereby local spontaneous-emission rates of quantum emitters can be designed. This follows from an analysis how electromagnetic Green functions transform under coordinate transformations. Spontaneous-emission rates can be either enhanced or suppressed using invisibility cloaks or gradient index lenses. Furthermore, the anisotropic material profile of the cloak enables the directional control of spontaneous emission.

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Entanglement creation with negative index metamaterials

Cited by 44 publications

References 38 publications

Generation and protection of steady-state quantum correlations due to quantum channels with memory

Generation and protection of steady-state quantum correlations due to quantum channels with memory

Surface polaritons in a negative-index metamaterial with active Raman gain

Quantum optical effective-medium theory and transformation quantum optics for metamaterials

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