Results 81 to 90 of about 1,582 (138)

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, Volume 13, Issue 28, 18 May 2026.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

Qutrit Dynamics of Acoustically‐Driven Nitrogen‐Vacancy Centers

Advanced Quantum Technologies, Volume 9, Issue 5, May 2026.
ABSTRACT We present a theoretical study of the interplay between the spin‐mechanical coupling and spin‐lattice relaxation in the dynamics of a nitrogen‐vacancy center in diamond. Single and double‐quantum spin transitions are driven by resonant acoustic pulses.
V. Moldoveanu, R. Dragomir
wiley   +1 more source

"THE AVERAGED LAGRANGIAN OF SOLITONS OF BOSE-EINSTEIN CONDENSATION "

Eurasian Physical Technical Journal, 2018
The effect of the fluctuation interaction of atoms forming a condensate on solitons of the Bose-Einstein condensation is considered. A short derivation of the Gross-Pitaevsky equation is given.
M.R. Zhumaev, M.Z. Sharipov, N.N. Mirzhonova   +2 more
doaj  

THE INTERFACE POSITION OF A BOSE-EINSTEIN CONDENSATE MIXTURE RESTRICTED BY A HARD WALL IN THE DOUBLE-PARABOLA APPROXIMATION

Tạp chí Khoa học Đại học Đà Lạt
In this study, we determine the interface position of a binary Bose-Einstein condensate mixture in the prewetting phase, confined by a hard wall, at absolute zero temperature. An approximate analytical result is obtained by employing the double-parabola
Duy Thanh Pham, Thanh Hai Dang
doaj   +1 more source

Two-dimensional Bose–Einstein condensate under pressure

New Journal of Physics, 2015
Evading the Mermin–Wagner–Hohenberg no-go theorem and revisiting with rigor the ideal Bose gas confined in a square box, we explore a discrete phase transition in two spatial dimensions.
Wonyoung Cho, Sang-Woo Kim, Jeong-Hyuck Park   +2 more
doaj   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, Volume 36, Issue 27, 2 April 2026.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Dynamics of cosmological phase crossover during Bose–Einstein condensation of dark matter in Tsallis cosmology

European Physical Journal C: Particles and Fields
During the cosmic evolution process, as the temperature of a cosmological boson gas falls below a certain threshold, a Bose–Einstein condensation process can occur at various points throughout the cosmic history of the Universe.
Subhra Mondal, Amitava Choudhuri
doaj   +1 more source

Indirect Band Edge and Chain‐Locked Linear Dichroism in the Quasi‐1D Van der Waals Antiferromagnet AgCrP2S6

Advanced Functional Materials, Volume 36, Issue 35, 30 April 2026.
AgCrP2S6 reveals a momentum‐indirect band edge (≈1.35 eV) and chain‐locked linear dichroism: the first direct transitions emerge at 1.6–1.8 eV for E||a. Resonant Raman and photoemission corroborate this assignment. In ACPS/graphene heterostructures, photocurrent turns on above ≈1.5 eV and follows the same polarization selection rules (anisotropy ≈0.53),
Oleksandr Volochanskyi, Sabrina Juergensen, Václav Valeš, Kumari Surbhi, Martin Mergl, Kseniia Mosina, Zdeněk Sofer, Jan Honolka, Patryk Kusch, Martin Kalbáč   +9 more
wiley   +1 more source

Critical slowdown of non-equilibrium polaron dynamics

New Journal of Physics, 2019
We study the quantum dynamics of a single impurity following its sudden immersion into a Bose–Einstein condensate. The ensuing formation of the Bose polaron in this general setting can be seen as impurity decoherence driven by the condensate, which we ...
K Knakkergaard Nielsen, L A Peña Ardila, G M Bruun, T Pohl   +3 more
doaj   +1 more source

Soliton diffusion in a Bose-Einstein condensate: A signature of the analogue Hawking radiation

Physics Letters B, 2019
The analog Hawking radiation (HR) emanating from a sonic black hole horizon formed in a cigar-shaped Bose-Einstein condensate (BEC) at finite temperature is investigated. In particular, we study the effect of HR on a dark (topological) soliton.
Chao Hang, Gregory Gabadadze, Guoxiang Huang   +2 more
doaj   +1 more source