Entanglement is a state where the state of two quantum particles (photons, for example) are intrinsically and absolutely linked. Quantum particles, due a principle called quantum superposition, exist in every theoretically possible state at the same time. A photon, for example, spins horizontally and vertically (different polarizations) at the same time. When you measure a quantum particle, though, it fixes on a single state. With entanglement, when you measure one half of the entangled pair, the other half instantly assumes the exact opposite state. If you measure one photon and it’s vertically polarized, its entangled sibling will be horizontally polarized. We study the quantum entanglement of the quasiparticle pairs emitted by analogue black holes.
We use a phenomenological description of the spectra in dispersive media to study the domains in parameter space where the final state is non-separable. In stationary flows, three modes are involved in each sector of fixed frequency, and not two as in homogeneous situations. The third spectator mode acts as an environment for the pairs, and the strength of the coupling significantly reduces the quantum coherence. The non-separability of the pairs emitted by white holes are also considered, and compared with that of black holes.
One of the main challenges of the analogue gravity program is to conceive and realize experiments where a clear signal of the analogue Hawking effect would be detected. When addressing this question, one should clearly distinguish the induced effect, which purely rests on the dynamics of classical fieelds, i.e., the scattering of incident waves, from the spontaneous effect which arises from the amplication of vacuum fluctuations. However, because the same mode ampli-cation is involved, both channels lead to very similar behaviors. Indeed, the space-time properties of the correlation patterns of the emitted quasi-particles are very much the same whether or not the spontaneous channel signicantly contributed. Therefore, if one wishes to experimentally distinguish the spontaneous from the induced, one must use observables that are sensitive to the small differences between the quantum and the classical.
read more : http://arxiv.org/pdf/1403.3335
We use a phenomenological description of the spectra in dispersive media to study the domains in parameter space where the final state is non-separable. In stationary flows, three modes are involved in each sector of fixed frequency, and not two as in homogeneous situations. The third spectator mode acts as an environment for the pairs, and the strength of the coupling significantly reduces the quantum coherence. The non-separability of the pairs emitted by white holes are also considered, and compared with that of black holes.
One of the main challenges of the analogue gravity program is to conceive and realize experiments where a clear signal of the analogue Hawking effect would be detected. When addressing this question, one should clearly distinguish the induced effect, which purely rests on the dynamics of classical fieelds, i.e., the scattering of incident waves, from the spontaneous effect which arises from the amplication of vacuum fluctuations. However, because the same mode ampli-cation is involved, both channels lead to very similar behaviors. Indeed, the space-time properties of the correlation patterns of the emitted quasi-particles are very much the same whether or not the spontaneous channel signicantly contributed. Therefore, if one wishes to experimentally distinguish the spontaneous from the induced, one must use observables that are sensitive to the small differences between the quantum and the classical.
read more : http://arxiv.org/pdf/1403.3335
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