Results 31 to 40 of about 38,380 (146)

A fundamental limit for integrated atom optics with Bose-Einstein condensates

, 2003
The dynamical response of an atomic Bose-Einstein condensate manipulated by an integrated atom optics device such as a microtrap or a microfabricated waveguide is studied.
A.E. Leanhardt, C. Henkel, D. Müller, D.S. Petrov, E. Andersson, E. Braaten, E. Braaten, E.A. Hinds, Ewan M. Wright, F.Kh. Abdullaev, H. Shi, Han Pu, J. Fortagh, J. Fortagh, J. Reichel, J.D. Weinstein, J.H. Thywissen, M. Olshanii, M. Ueda, Michael W. Jack, N.H. Dekker, P.F. Bedaque, Pierre Meystre, R. Folman, S. Dyachenko, Thorsten Köhler, V.E. Zakharov, Weiping Zhang   +27 more
core   +1 more source

Transient Supersolid Properties in an Array of Dipolar Quantum Droplets

Physical Review X, 2019
We study theoretically and experimentally the emergence of supersolid properties in a dipolar Bose-Einstein condensate. The theory reveals a ground state phase diagram with three distinct regimes—a regular Bose-Einstein condensate and incoherent and ...
Fabian Böttcher, Jan-Niklas Schmidt, Matthias Wenzel, Jens Hertkorn, Mingyang Guo, Tim Langen, Tilman Pfau   +6 more
doaj   +1 more source

Bose-Einstein Condensate in Synchronous Coordinates

Physical Sciences Forum, 2023
Analytical spherically symmetric static solution to the set of Einstein and Klein-Gordon equations in a synchronous reference frame is considered. In a synchronous reference frame, a static solution exists in the ultrarelativistic limit p=−ε/3.
Boris E. Meierovich
doaj   +1 more source

Bose-Einstein condensation of indirect excitons in coupled quantum wells

, 2003
We study the ground-state properties of a quasi-two-dimensional Bose-Einstein condensate of indirect excitons, which are confined in an anisotropic harmonic potential. Incorporating the interactions, we calculate the order parameter variationally.
Kavoulakis, G. M.
core   +1 more source

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

Advanced Functional Materials, EarlyView.
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

Temporal evolution of cosmological density perturbations of the Bose–Einstein condensate dark matter

European Physical Journal C: Particles and Fields
Dark matter is assumed to be composed of scalar boson particles that form Bose–Einstein condensate during the cosmic evolution of the Universe when the temperature of the dark matter is below the critical temperature $$T_{cr}$$ T cr .
Subhra Mondal, Amitava Choudhuri
doaj   +1 more source

Self‐Hybridized Exciton‐Polariton Photodetectors From Layered Metal‐Organic Chalcogenolates

Advanced Functional Materials, EarlyView.
Self‐hybridized exciton‐polariton photodetectors are demonstrated using high refractive index mithrene, eliminating the need for top mirrors. This simplified architecture enables tunable sub‐bandgap photodetection via lower exciton‐polariton states and enhanced carrier transport through ultrafast polariton group velocities.
Bongjun Choi, Adam D. Alfieri, Wangleong Chen, Deep Jariwala   +3 more
wiley   +1 more source

Gravitational caustics in an atom laser

Nature Communications, 2021
Previously, the study of caustics has mostly focused on experiments with light. Here, the authors demonstrate gravitational caustics and investigate catastrophe atom optics using the matter waves of an atom laser generated from a Bose-Einstein condensate.
M. E. Mossman, T. M. Bersano, Michael McNeil Forbes, P. Engels   +3 more
doaj   +1 more source

Periodic Quantum Tunneling and Parametric Resonance with Cigar-Shaped Bose-Einstein Condensates

, 2002
We study the tunneling properties of a cigar-shaped Bose-Einstein condensate by using an effective 1D nonpolynomial nonlinear Schr\"odinger equation (NPSE).
A Parola, Arnold V I, Fribel S, Gross E P, L Reatto, L Salasnich, Landau L D, Pitaevskii L P, Pitaevskii L P, Salasnich L, Salasnich L, Zapata I   +11 more
core   +1 more source

Directional Flow of Confined Polaritons in CrSBr

Advanced Materials, EarlyView.
CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak, Sichao Yu, Jaime Abad‐Arredondo, Biswajit Datta, Andy Cruz, Sorah Fischer, Kseniia Mosina, Zdeněk Sofer, Antonio I. Fernández‐Domínguez, Francisco J. Garcia‐Vidal, Vinod M. Menon   +10 more
wiley   +1 more source