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Measuring the Evolution of Entanglement in Compton Scattering [101.11630543545151]
The behavior of quantum entanglement during scattering is identical to the behavior of initially classically correlated photons up to a constant factor equal to two. Our dedicated experiment with photons confirms these results and explains the "Puzzle of Decoherence" observed recently.
arXiv Detail & Related papers (2024-06-20T14:21:23Z)
Contact interactions, self-adjoint extensions, and low-energy scattering [0.0]
We show that the one-dimensional scattering problem is surprisingly intricate. We show that the families of self-adjoint extensions correspond to a coupled system of symmetric and antisymmetric outgoing waves. As an application, the spectrum of a general point interaction with a harmonic trap is solved in one dimension.
arXiv Detail & Related papers (2024-03-22T15:39:56Z)
Correlation Effects in a Trapped Bose-Fermi Mixture: Exact Results [0.0]
Many-body properties of a fermionic impurity embedded in a Bose-Einstein condensate are analyzed. harmonic-interaction model for Bose-Fermi mixtures is used.
arXiv Detail & Related papers (2023-11-20T21:18:36Z)
On the Preservation and Manifestation of Quantum Entanglement [0.0]
Bell experiments have confirmed that quantum entanglement is an inseparable correlation but there is no faster-than-light influence when a local measurement is performed. We show here that even though the inseparable correlation may be initially created by previous physical interaction between the two particles, the preservation and manifestation of such inseparable correlation are achieved through extremizing an information metric.
arXiv Detail & Related papers (2023-11-10T07:33:13Z)
Topologically bound states, non-Hermitian skin effect and flat bands, induced by two-particle interaction [91.3755431537592]
We study theoretically repelling quantum states of two spinless particles in a one-dimensional tight-binding model. We demonstrate, that when the particles are not identical, their interaction drives nontrivial correlated two-particle states.
arXiv Detail & Related papers (2022-11-11T07:34:54Z)
Identical damped harmonic oscillators described by coherent states [0.0]
We take a single coherent state and compute the relative entropy of coherence, $C_r$, in the energy, position and momentum bases. Coherence is computed for a superposition of two coherent states, a cat state, and also a superposition of two cat states in the energy basis as a function of separation. Considering a system of two non-interacting DHOs, the effect of quantum statistics is studied on the coherence of reduced single-particle states.
arXiv Detail & Related papers (2022-09-02T09:48:36Z)
Characterization of Two-Particle Interference by Complementarity [0.0]
Bohr's Complementarity Principle is formulated in terms of the distinguishability of various paths a quanton can take, and the measure of the interference it produces. The Hong-Ou-Mandel (HOM) effect and the Hanbury-Brown-Twiss (HBT) effect are two well known examples. Two-particle interference is not as easy to define as its single particle counterpart, and the realization that it involves interference of two-particle amplitudes came much later.
arXiv Detail & Related papers (2022-01-12T16:43:05Z)
Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
arXiv Detail & Related papers (2021-07-23T07:30:57Z)
Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
arXiv Detail & Related papers (2021-05-12T06:47:35Z)
Long-distance entanglement of purification and reflected entropy in conformal field theory [58.84597116744021]
We study entanglement properties of mixed states in quantum field theory via entanglement of purification and reflected entropy. We find an elementary proof that the decay of both, the entanglement of purification and reflected entropy, is enhanced with respect to the mutual information behaviour.
arXiv Detail & Related papers (2021-01-29T19:00:03Z)
Light-matter interactions near photonic Weyl points [68.8204255655161]
Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerated at a single momentum point, labeled as Weyl point. We analyze the dynamics of a single quantum emitter coupled to a Weyl photonic bath as a function of its detuning with respect to the Weyl point.
arXiv Detail & Related papers (2020-12-23T18:51:13Z)
Quantum correlations between separated particles [0.0]
Long-range quantum correlations between particles are usually formulated by assuming the persistence of an entangled state after the particles have spearated.<n>This approach is re-examined based upon studying the correlations present in a pair of EPR spins.
arXiv Detail & Related papers (2003-04-28T21:43:32Z)

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