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Violating Bell's inequalities in vacuum
We employ an approach wherein the ground state entanglement of a relativistic free scalar field is directly probed in a controlled manner. The approach consists of having a pair of initially…
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Entanglement from the Vacuum
We explore the entanglement of the vacuum of a relativistic field by letting a pair of causally disconnected probes interact with the field. We find that, even when the probes are initially…
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Revisiting Hardy's Paradox: Counterfactual Statements, Real Measurements, Entanglement and Weak Values
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Detecting vacuum entanglement in a linear ion trap.
TLDR
It is shown that the entanglement between single ions or groups of ions can be swapped to the internal levels of two ions by sending laser pulses that couple the internal and motional degrees of freedom.
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Spatial structures and localization of vacuum entanglement in the linear harmonic chain
We study the structure of vacuum entanglement for two complimentary segments of a linear harmonic chain, applying the modewise decomposition of entangled Gaussian states discussed by Boteno and…
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Measurement of time of arrival in quantum mechanics
It is argued that the time of arrival cannot be precisely defined and measured in quantum mechanics. By constructing explicit toy models of a measurement, we show that for a free particle it cannot…
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Modes of oscillation in radiofrequency Paul traps
We examine the time-dependent dynamics of ion crystals in radiofrequency traps. The problem of stable trapping of general three-dimensional crystals is considered and the validity of the…
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Critical and noncritical long-range entanglement in Klein-Gordon fields
We investigate the entanglement between two spatially separated intervals in the vacuum state of a free one-dimensional Klein-Gordon field by means of explicit computations in the continuum limit of…
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Quantum coherence of discrete kink solitons in ion traps.
TLDR
It is shown that long-lived solitonlike configurations are manifested as deformations of the zigzag structure in the linear Paul trap, and are topologically protected in a circular trap with an odd number of ions, suggesting that ion traps can be used to test quantum-mechanical effects with solitons.
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Origin of the thermal radiation in a solid state analog of a black hole
An effective black-hole-like horizon occurs, for electromagnetic waves in matter, at a surface of singular electric and magnetic permeabilities. In a physical dispersive medium this horizon…
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