Dispersion Forces II

Buhmann, Stefan Yoshi

doi:10.1007/978-3-642-32466-6

Cited by 119 publications

(156 citation statements)

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“…As shown in the literature [28,30], the radiation reaction field gives rise to frequency shifts and spontaneous decay for atom A, see Figs. 1(a) and (b).…”

Section: Atom-field Dynamicssupporting

confidence: 56%

“…Since the evolution of the whole system is unitary the commutator between two electric fields coincides with the commutator between free fields [28,29] …”

Section: Atom-field Dynamicsmentioning

confidence: 99%

“…If an initially excited atom A is placed near a magnetodielectric body, the resonant contribution, associated with a possible emission of a real photon, reads [28]:…”

Section: Comparison To Casimir-polder Forcementioning

confidence: 99%

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van der Waals interactions between excited atoms in generic environments

et al. 2016

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We consider the the van der Waals force involving excited atoms in general environments, constituted by magnetodielectric bodies. We develop a dynamical approach studying the dynamics of the atoms and the field, mutually coupled. When only one atom is excited, our dynamical theory suggests that for large distances the van der Waals force acting on the ground-state atom is monotonic, while the force acting in the excited atom is spatially oscillating. We show how this latter force can be related to the known oscillating Casimir-Polder force on an excited atom near a (ground-state) body. Our force also reveals a population-induced dynamics: for times much larger that the atomic lifetime the atoms will decay to their ground-states leading to the van der Waals interaction between ground-state atoms.

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“…As shown in the literature [28,30], the radiation reaction field gives rise to frequency shifts and spontaneous decay for atom A, see Figs. 1(a) and (b).…”

Section: Atom-field Dynamicssupporting

confidence: 56%

“…Since the evolution of the whole system is unitary the commutator between two electric fields coincides with the commutator between free fields [28,29] …”

Section: Atom-field Dynamicsmentioning

confidence: 99%

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van der Waals interactions between excited atoms in generic environments

et al. 2016

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“…Thereby, the Green's tensor generalizes the static picture of mirror charges to a full electrodynamic treatment. The CP potential of an atom prepared in an eigenstate jmi may be given as U m ðrÞ ¼ U nr m ðrÞ þ U r m ðrÞ, with nonresonant and resonant contributions [25,26],…”

Section: Atom-surface Interactionsmentioning

confidence: 99%

Coupling Thermal Atomic Vapor to Slot Waveguides

et al. 2018

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We study the interaction of thermal rubidium atoms with the guided mode of slot waveguides integrated in a vapor cell. Slot waveguides provide strong confinement of the light field in an area that overlaps with the atomic vapor. We investigate the transmission of the atomic cladding waveguides depending on the slot width, which determines the fraction of transmitted light power interacting with the atomic vapor. An elaborate simulation method has been developed to understand the behavior of the measured spectra. This model is based on individual trajectories of the atoms and includes both line shifts and decay rates due to atom-surface interactions that we have calculated for our specific geometries using the discrete dipole approximation. Furthermore, we investigate density-dependent effects on the line widths and line shifts of the rubidium atoms in the subwavelength interaction region of a slot waveguide.

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“…These interactions, of purely quantum origin, have been measured with accuracy [20,21]. When one of the two atoms is in an excited state, a real resonant photon can be exchanged between the atoms.…”

Section: Introductionmentioning

confidence: 99%

Van der Waals and resonance interactions between accelerated atoms in vacuum and the Unruh effect

Lattuca

Marino

Noto

et al. 2017

J. Phys.: Conf. Ser.

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We discuss different physical effects related to the uniform acceleration of atoms in vacuum, in the framework of quantum electrodynamics. We first investigate the van der Waals/Casimir-Polder dispersion and resonance interactions between two uniformly accelerated atoms in vacuum. We show that the atomic acceleration significantly affects the van der Waals force, yielding a different scaling of the interaction with the interatomic distance and an explicit time dependence of the interaction energy. We argue how these results could allow for an indirect detection of the Unruh effect through dispersion interactions between atoms. We then consider the resonance interaction between two accelerated atoms, prepared in a correlated Bell-type state, and interacting with the electromagnetic field in the vacuum state, separating vacuum fluctuations and radiation reaction contributions, both in the free-space and in the presence of a perfectly reflecting plate. We show that nonthermal effects of acceleration manifest in the resonance interaction, yielding a change of the distance dependence of the resonance interaction energy. This suggests that the equivalence between temperature and acceleration does not apply to all radiative properties of accelerated atoms. To further explore this aspect, we evaluate the resonance interaction between two atoms in non inertial motion in the coaccelerated (Rindler) frame and show that in this case the assumption of an Unruh temperature for the field is not required for a complete equivalence of locally inertial and coaccelerated points of views.

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Dispersion Forces II

Cited by 119 publications

References 0 publications

van der Waals interactions between excited atoms in generic environments

van der Waals interactions between excited atoms in generic environments

Coupling Thermal Atomic Vapor to Slot Waveguides

Van der Waals and resonance interactions between accelerated atoms in vacuum and the Unruh effect

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