Article
Materials Science, Multidisciplinary
Natalia Emelianova, Nail Khusnutdinov, Rashid Kashapov
Summary: In this study, explicit formulas for the Casimir energy of parallel sheets composed of conducting planes with tensorial conductivities were derived using the scattering matrix approach. Formulas for the Casimir energy and force acting on the planes within a stack of graphene were obtained by solving the recurrence relations. The binding energy in the graphene stack with graphite interplane separation was also calculated and found to be E-ib = 9.9 meV/atom. Notably, the Casimir force on graphene sheets decreases rapidly for planes beyond the first one, with the force on the second graphene layer being 35 times smaller than that experienced by the first layer.
Article
Optics
Tao Gong, Benjamin Spreng, Miguel Camacho, Inigo Liberal, Nader Engheta, Jeremy N. Munday
Summary: This article proposes multiple configurations for the local modulation of Casimir forces through electrical gating of transparent conductive oxide (TCO) materials. The study predicts a force modulation of over 400 pN by switching the gate voltage. The research also emphasizes the importance of controlling the thickness of the oxide layer.
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Physics, Multidisciplinary
Thorsten Emig, Giuseppe Bimonte
Summary: Recent measurements of Casimir forces have shown that quantum fluctuations of the electromagnetic field undergo intricate modifications in complex geometries. In this paper, a multiple scattering description is introduced for calculating Casimir interactions between bodies of arbitrary shape and material composition. This approach allows for the calculation of interactions in complex geometries using just a few wave scatterings, without any prior knowledge of the scattering amplitudes of the bodies. Some initial applications demonstrate the efficacy of this method.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Kouki Nakata, Kei Suzuki
Summary: Quantum fluctuations, key concepts of quantum mechanics, induce a zero-point energy shift known as the Casimir effect. This phenomenon has attracted attention in various fields, from elementary particle physics to condensed matter physics and photonics. While yttrium iron garnet (YIG) has been extensively studied for spintronics, the application of the Casimir effect to ferrimagnetic thin films has not been explored enough. In this study, using lattice field theory, we investigate the Casimir effect on magnons in insulating magnets and find that it can arise in ferrimagnetic YIG thin films. Our results suggest that YIG can serve as a promising platform for Casimir engineering in magnon-based spintronics.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Francesco Sorge
Summary: This study investigates the influence of a time-varying spacetime background on the vacuum polarization of a massless quantum field confined to a Casimir cavity. The background is modeled as an anisotropic Bianchi-I spacetime, and using Schwinger's proper-time approach, the vacuum polarization inside the Casimir cavity is evaluated. The results show a small shift in the field vacuum energy once the perturbation is over, indicating that the time-dependent background distorts the field modes and causes a permanent change in the zero-point energy of the field confined to the Casimir apparatus.
Review
Physics, Multidisciplinary
D. M. Dantchev, S. Dietrich
Summary: Introduces the influence of temperature fluctuations and quantum nature on the properties of material in different media, as well as the modifications of the surrounding medium caused by the shape and properties of the material. It mentions the concept of the Casimir force, which is the force between bodies caused by the excitation of the medium. The focus is on the critical Casimir effect, which is the force between bodies due to fluctuations in the order parameter near the critical point. It presents the exact results of the critical Casimir effect in different models and geometries.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Astronomy & Astrophysics
C. D. Fosco, G. Hansen
Summary: We study the phenomenon of fermion pair creation due to the time dependence of curves in 2 + 1 dimensions, with boundary conditions imposed on a Dirac field. We show that these conditions, which relate to the normal component of the fermionic current, depend on a dimensionless parameter. By maximizing the pair creation effect under bag boundary conditions, obtained for a specific value of the parameter, we can extract information on the probability of vacuum decay using an expansion in powers of the deformation of the curves.
Article
Engineering, Mechanical
Huazhou Kang, Feng Shu, Zhi Li, Xiaofeng Yang
Summary: This paper proposes a new bonding piezoelectric stack (BPS) model using conductive adhesive (CA) with metal-coated polymer fillers, in order to verify its feasibility in piezoelectric devices and model-based controller designs. The electric and mechanical behaviors of BPS are described using a dielectric model and a Kelvin-Voigt model. The theoretical simulation and experiment results show that the model has over 97% accuracy in predicting the displacement of BPS when CA is used with metal-coated polymer fillers, which can be applied in the design of large-scale piezoelectric devices.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Physics, Multidisciplinary
Xingyu Guo, Jiaxing Zhao, Pengfei Zhuang
Summary: In this study, we investigated the Casimir effect in equilibrium and non-equilibrium photon gas under the U(1) gauge field using quantum kinetic theory. We derived the transport, constraint, and gauge fixing equations for the photon number distribution from Maxwell's equations. The energy variation and Casimir force for a finite system considering the boundary condition were also calculated. The results showed that the Casimir force in equilibrium state is suppressed by the thermal motion of photons when considering two adiabatic plates. In a non-equilibrium state, the photon-induced Casimir force oscillates and decays with time, eventually disappearing.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Zhujing Xu, Xingyu Gao, Jaehoon Bang, Zubin Jacob, Tongcang Li
Summary: The study explores the non-reciprocal energy transfer phenomenon caused by quantum vacuum fluctuations, demonstrating strong coupling between two micromechanical oscillators through modulation of Casimir interaction parameters, leading to non-reciprocal energy transfer.
NATURE NANOTECHNOLOGY
(2022)
Article
Optics
A. Agusti, L. Garcia-Alvarez, E. Solano, C. Sabin
Summary: This research explores a microscopic model of the dynamical Casimir effect, demonstrating that under certain conditions, a large number of photons can be generated without changing the state of the qubit.
Article
Physics, Multidisciplinary
Lanyi Xie, Fuwei Yang, Bai Song
Summary: By employing the Lifshitz theory, researchers have discovered a significant isotope effect of over 10-1 in polar dielectrics. This effect arises from the isotope-mass-induced line shift of the zone-center optical phonons and is insensitive to the linewidth. The three-orders-of-magnitude difference between polar dielectrics and metals is due to the distinct isotopic dependence of the phonon and plasma frequencies.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Materials Science, Multidisciplinary
Gideon Lee, Aleksandr Rodin
Summary: The study introduces a general method for calculating the Helmholtz free energy due to vibrational modes in systems of varying dimensionality and composition, enabling the extraction of defect interaction energy between different defect configurations at different temperatures. The effectiveness of the approach is demonstrated through numerical calculations and validation using exact diagonalization.
Article
Physics, Nuclear
R. Kashapov, N. Khusnutdinov, L. M. Woods
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2016)
Article
Materials Science, Multidisciplinary
Nail Khusnutdinov, Rashid Kashapov, Lilia M. Woods
Article
Physics, Nuclear
N. Khusnutdinov, N. Emelianova
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2019)
Article
Physics, Multidisciplinary
N. Khusnutdinov, L. M. Woods
Article
Physics, Nuclear
N. Khusnutdinov
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2020)
Article
Astronomy & Astrophysics
N. Emelianova, I. Fialkovsky, N. Khusnutdinov
MODERN PHYSICS LETTERS A
(2020)
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
Materials Science, Multidisciplinary
Natalia Emelianova, Nail Khusnutdinov, Rashid Kashapov
Summary: In this study, explicit formulas for the Casimir energy of parallel sheets composed of conducting planes with tensorial conductivities were derived using the scattering matrix approach. Formulas for the Casimir energy and force acting on the planes within a stack of graphene were obtained by solving the recurrence relations. The binding energy in the graphene stack with graphite interplane separation was also calculated and found to be E-ib = 9.9 meV/atom. Notably, the Casimir force on graphene sheets decreases rapidly for planes beyond the first one, with the force on the second graphene layer being 35 times smaller than that experienced by the first layer.
Article
Materials Science, Multidisciplinary
M. Bordag, I Fialkovsky, N. Khusnutdinov, D. Vassilevich
Summary: Bulk polarization tensor and dielectric functions for Dirac materials are computed using quantum field theory methods in the presence of a mass gap, chemical potential, and finite temperature. The characteristic features of dielectric functions and their influence on Casimir pressure in Dirac materials are described in detail.
Article
Materials Science, Multidisciplinary
Mauro Antezza, Ignat Fialkovsky, Nail Khusnutdinov
Article
Materials Science, Multidisciplinary
Pablo Rodriguez-Lopez, Adrian Popescu, Ignat Fialkovsky, Nail Khusnutdinov, Lilia M. Woods
COMMUNICATIONS MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Ignat Fialkovsky, Nail Khusnutdinov, Dmitri Vassilevich
Article
Optics
Nail Khusnutdinov, Rashid Kashapov, Lilia M. Woods