Article
Optics
Danilo T. Alves, Lucas Queiroz, Edson C. M. Nogueira, N. M. R. Peres
Summary: This paper investigates the lateral van der Waals (vdW) force between a neutral polarizable point particle and a perfectly conducting infinite cylinder. It is found that under certain conditions, including particle orientation, anisotropy, and cylinder curvature, the lateral vdW force can exhibit a repulsive behavior, pushing the particle away from the cylinder. This study extends the understanding of the sign inversion in lateral forces and the characteristics of lateral vdW forces.
Article
Physics, Particles & Fields
Saptarshi Saha, Chiranjeeb Singha, Arpan Chatterjee
Summary: The paper examines a two-atom system moving through a circular ring at ultra-relativistic speed and interacting weakly with quantum fields. The study calculates the second-order energy shift of entangled states, revealing the presence of resonance Casimir-Polder interaction in a circular trajectory. The results show that the energy shift is delayed due to interactions with the fields, and this phenomenon can be observed through the polarization transfer technique.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Valentin Gebhart, Juliane Klatt, Gunther Cronenberg, Hanno Filter, Stefan Yoshi Buhmann
Summary: This study predicts a repulsive Casimir-Polder-type dispersion interaction between a single neutron and a metal or dielectric surface, due to the intrinsic magnetic moment of the neutron. The interaction is found to be considerably smaller than the standard atom-surface Casimir-Polder force, but comparable to the gravitational potential of the same surface, which should be considered in future neutron interference experiments.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Galina L. Klimchitskaya, Constantine C. Korikov, Vladimir M. Mostepanenko, Oleg Yu. Tsybin
Summary: This study investigates the out-of-thermal-equilibrium Casimir-Polder force between nanoparticles and dielectric substrates coated with gapped graphene using the Dirac model and the polarization tensor formalism. The results show that the presence of a substrate can increase the magnitude of the nonequilibrium force. The temperature of the graphene-coated substrate also affects the force magnitude.
Article
Astronomy & Astrophysics
Kacper Debski, Piotr T. Grochowski, Andrzej Dragan
Summary: By using the Unruh-DeWitt detector model, we found an interesting relation between the excitation rate of an atom and the Casimir-Polder energy, providing an alternative method for investigating the Casimir-Polder effect.
Article
Optics
K. Wongcharoenbhorn, C. Koller, T. M. Fromhold, W. Li
Summary: We investigate the thermal Casimir-Polder (CP) potential of 87Rb atoms in Rydberg nS-states near single- and double-layer graphene, and briefly explore the lifetimes near graphene-hexagonal boron nitride (hBN) multilayered structures. The dependence of the CP potential on parameters such as atom-surface distance, temperature, principal quantum number n, and graphene Fermi energy are studied. We find that the CP potential is dominated by nonresonant and evanescent-wave terms in the nonretarded regime, while exhibiting spatial oscillations in the retarded regime.
Article
Materials Science, Multidisciplinary
G. L. Klimchitskaya, V. M. Mostepanenko, O. Yu. Tsybin
Summary: In this study, the nonequilibrium Casimir-Polder force between a nanoparticle and a graphene sheet kept at different temperatures was examined using the formalism of the polarization tensor in the framework of a Dirac model. The results demonstrate that the magnitude of the force increases with the temperature of the graphene sheet. The impact of nonequilibrium conditions on the force becomes smaller at larger separations. Our findings reveal that for a graphene sheet with a lower temperature than the environment, the attractive Casimir-Polder force vanishes at a specific separation distance and becomes repulsive at larger distances. This effect has potential applications in fundamental graphene research and force control in bioelectronic microdevices.
Article
Optics
Zhe Jin, Wentao Wang, Yumei Long, Tian Tian, Xue Zhang, Taiyu Zheng
Summary: This paper discusses a model of interaction between a two-level atom and a dissipative cavity, analyzing the dynamical Casimir-Polder forces between the atom and the cavity wall in different initial states using quasimode theory to describe the electromagnetic field. Results show that the magnitude and properties of the dynamical Casimir-Polder force vary with different initial states of atoms, and can be reduced to zero by adjusting the initial state. This conclusion has important implications for quantum information applications.
Article
Physics, Multidisciplinary
Jia-Nan Rong, Liang Chen, Kai Chang
Summary: The theoretical study shows that the Casimir attraction between Weyl semimetals can be enhanced by the chiral anomaly when the distance between semi-infinite Weyl semimetals is in the micrometer regime. The Casimir attraction exhibits anisotropic behavior for the relative orientation of separations of Weyl nodes in the Brillouin zone when they are parallel to the interface. Additionally, the Casimir force can be repulsive in the micrometer regime under certain conditions.
CHINESE PHYSICS LETTERS
(2021)
Article
Optics
Zhe Jin, Tian Tian, Wentao Wang, Yumei Long, Xue Zhang, Taiyu Zheng
Summary: This paper studies the dynamical Casimir-Polder force between an ensemble of identical two-level atoms and the wall of a rectangle waveguide with semi-infinite length. Using perturbation theory, the authors solve the Heisenberg equation to obtain the energy shift analytically and the Casimir-Polder force numerically. The results show a close connection between the dynamical behavior of the Casimir force and photon propagation in the waveguide.
Article
Optics
Bing-Sui Lu, Khatee Zathul Arifa, Martial Ducloy
Summary: This paper investigates the resonant Casimir-Polder interaction between an excited atom with a single transition and a Chern insulator. The study reveals that the resonant Casimir-Polder shift can be significantly enhanced when the atomic de-excitation frequency is close to a value associated with a van Hove singularity of the Chern insulator. Additionally, the resonant Casimir-Polder force can become monotonically decaying and repulsive under specific conditions, offering the potential to design atom-surface interactions with a repulsive behavior over a relatively large range of separations.
EUROPEAN PHYSICAL JOURNAL D
(2022)
Article
Astronomy & Astrophysics
Nail Khusnutdinov, Natalia Emelianova
Summary: The study investigated the low-temperature expansion of the Casimir-Polder free energy for an atom and graphene using the Poisson representation. The analysis extended to different relations between chemical potential mu and mass gap parameter m, with a focus on the dependence of graphene conductivities on mu and m. Results revealed the thermal correction for mu>m resembling T-2, and differing behavior for mu<m or mu
Article
Physics, Multidisciplinary
R. Higa, J. F. Babb
Summary: This study investigates the long-range electromagnetic interactions between neutrons, using dynamic dipole polarizabilities fitted to chiral EFT results. The results are relevant to the physics of confined ultracold neutrons inside bottles.
BRAZILIAN JOURNAL OF PHYSICS
(2021)
Article
Optics
Fam Le Kien, D. F. Kornovan, Sile Nic Chormaic, Thomas Busch
Summary: This study investigates the Casimir-Polder potential of a multilevel alkali-metal atom near an optical nanofiber. The potential of low-lying excited states can be positive and repulsive in certain regions of atom-to-surface distances. The study also calculates the nanofiber-induced shifts of the transition frequencies of the atomic rubidium D-2 and D-1 lines.
Article
Geosciences, Multidisciplinary
He Zhang, Zhihong Zhong, Rongxin Tang, Xiaohua Deng, Haimeng Li, Dedong Wang
Summary: The study reveals the presence of quasi-periodic whistler-mode waves at the center of a macroscale magnetic hole near Earth's magnetopause, corresponding to electron temperature anisotropy. These waves are accompanied by a significant ultra-low frequency wave of the background magnetic field, exacerbating the evolution of the magnetic hole and contributing to the formation of electron pitch angle distribution.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Physics, Multidisciplinary
Robert Bennett, Claudia Eberlein
NEW JOURNAL OF PHYSICS
(2012)
Article
Optics
Claudia Eberlein, Robert Zietal
Article
Optics
Claudia Eberlein, Robert Zietal
Article
Optics
Robert Bennett, Claudia Eberlein
Article
Optics
Claudia Eberlein, Robert Zietal
Article
Optics
Claudia Eberlein, Robert Zietal
Article
Optics
Robert Bennett, Claudia Eberlein
Article
Optics
Robert Bennett, Claudia Eberlein
Article
Astronomy & Astrophysics
Robert Zietal, Claudia Eberlein
Article
Optics
Robert Bennett, Stefan Yoshi Buhmann, Claudia Eberlein
Article
Optics
Ana Maria Contreras Reyes, Claudia Eberlein
Article
Optics
Claudia Eberlein, Robert Zietal
Article
Optics
Ana Maria Contreras Reyes, Claudia Eberlein
Article
Optics
Claudia Eberlein, Robert Zietal