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Radiative Processes in Quantum Electrodynamics: Theory, Experiments and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Quantum Science and Technology".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 5209

Special Issue Editors


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Guest Editor
Dipartimento di Fisica e Chimica – E. Segrè, Università degli Studi di Palermo, Via Archirafi 36, I-90123 Palermo, Italy
Interests: quantum electrodynamics; vacuum fluctuations; casimir effects; causality and non-locality in QED; radiative processes in static and dynamical structured environments; quantum field theory in accelerated frames; unruh effect; cosmological axions and dark matter
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Guest Editor
Dipartimento di Fisica e Chimica– Emilio Segrè, Università degli Studi di Palermo, Palermo, Italy
Interests: quantum electrodynamics; quantum field theory in curved space–time; quantum optics; static and dynamical Casimir effect; radiative processes in static and dynamical structured environment; optomechanics; quantum fluctuations; Casimir effect out of thermal equilibrium

Special Issue Information

Dear Colleagues,

Vacuum fluctuations of the quantized electromagnetic field are at the origin of many observable phenomena, such as spontaneous emission of radiation by atoms or molecules, van der Waals, Casimir and Casimir–Polder forces between neutral objects, resonant interactions, and resonant energy transfer between atoms/molecules. These effects are present at the micro- and nanoscale and play a fundamental role in a variety of physical, chemical, and biological processes, as well in applications in micro- and nanotechnologies. Recent theoretical studies and advances in experimental techniques and in material science have shown that radiative properties of atoms/molecules can be tailored and controlled through nontrivial environments (such as photonic crystals, waveguide, cavities) or in dynamical situations (for example, dynamical boundary conditions or dynamical environments). 

The main aim of this Special Issue is to give an overview of new theoretical and experimental progresses on radiative processes by atoms or molecules, such as resonant and dispersion van der Waals/Casimir interactions, resonant energy transfer, and collective spontaneous emission, both in static and dynamical situations. Applications to nanotechnologies will be also considered. Topics will include:

  • Van der Waals and Casimir dispersion interactions (theory and applications)
  • Dynamical Casimir and Casimir–Polder effect
  • Resonant interactions and resonant energy transfer in structured environment (such as photonic crystals, waveguides, cavities, and nanostructured materials)
  • Collective spontaneous emission of atoms in structured environments
  • Radiative processes in dynamical structured environments
  • Casimir effects out of thermal equilibrium
  • Casimir forces in micro- and nano-electromechanical system
  • Dispersion and resonance interactions in biological systems
  • Optomechanical systems
  • Casimir friction
  • Casimir torque
  • Heat transfer

Dr. Lucia Rizzuto
Dr. Antonio Noto
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • vacuum fluctuations
  • static and dynamical Casimir effect
  • Casimir–Polder interactions
  • resonant energy transfer
  • spontaneous emissions
  • photonic crystals
  • micro-electromechanical systems (MEMS)
  • nano-electromechanical systems (NEMS)
  • quantum optomechanics
  • heat transfer

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Published Papers (2 papers)

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16 pages, 315 KiB  
Article
Bridge-Mediated RET between Two Chiral Molecules
by A Salam
Appl. Sci. 2021, 11(3), 1012; https://doi.org/10.3390/app11031012 - 23 Jan 2021
Cited by 5 | Viewed by 1507
Abstract
Molecular quantum electrodynamics (QED) theory is employed to calculate the rate of resonance energy transfer (RET) between a donor, D, described by an electric dipole and quadrupole, and magnetic dipole coupling, and an identical acceptor molecule, A, that is mediated by [...] Read more.
Molecular quantum electrodynamics (QED) theory is employed to calculate the rate of resonance energy transfer (RET) between a donor, D, described by an electric dipole and quadrupole, and magnetic dipole coupling, and an identical acceptor molecule, A, that is mediated by a third body, T, which is otherwise inert. A single virtual photon propagates between D and T, and between T and A. Time-dependent perturbation theory is used to compute the matrix element, from which the transfer rate is evaluated using the Fermi golden rule. This extends previous studies that were limited to the electric dipole approximation only and admits the possibility of the exchange of excitation between a chiral emitter and absorber. Rate terms are computed for specific pure and mixed multipole-dependent contributions of D and A for both an oriented arrangement of the three particles and for the freely tumbling situation. Mixed multipole moment contributions, such as those involving electric–magnetic dipole or electric dipole–quadrupole coupling at one center, do not survive random orientational averaging. Interestingly, the mixed electric–magnetic dipole D and A rate term is non-vanishing and discriminatory, exhibiting a dependence on the chirality of the emitter and absorber, and is entirely retarded. It vanishes, however, if D and A are oriented perpendicularly to one another. Near- and far-zone asymptotes of isotropic contributions to the rate are also evaluated, demonstrating radiationless short-range transfer and inverse-square radiative exchange at very large separations. Full article

Other

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14 pages, 2188 KiB  
Perspective
Perspective on Some Recent and Future Developments in Casimir Interactions
by Lilia M. Woods, Matthias Krüger and Victor V. Dodonov
Appl. Sci. 2021, 11(1), 293; https://doi.org/10.3390/app11010293 - 30 Dec 2020
Cited by 15 | Viewed by 3007
Abstract
Here, we present a critical review of recent developments in Casimir physics motivated by discoveries of novel materials. Specifically, topologically nontrivial properties of the graphene family, Chern and topological insulators, and Weyl semimetals have diverse manifestations in the distance dependence, presence of fundamental [...] Read more.
Here, we present a critical review of recent developments in Casimir physics motivated by discoveries of novel materials. Specifically, topologically nontrivial properties of the graphene family, Chern and topological insulators, and Weyl semimetals have diverse manifestations in the distance dependence, presence of fundamental constants, magnitude, and sign of the Casimir interaction. Limited studies of the role of nonlinear optical properties in the interaction are also reviewed. We show that, since many new materials have greatly enhanced the nonlinear optical response, new efficient pathways for investigation of the characteristic regimes of the Casimir force need to be explored, which are expected to lead to new discoveries. Recent progress in the dynamical Casimir effect is also reviewed and we argue that nonlinear media can open up new directions in this field as well. Full article
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