Results 31 to 40 of about 31,438 (162)
Einstein–Bose condensation of Onsager vortices
New Journal of Physics, 2018 We have studied statistical mechanics of a gas of vortices in two dimensions. We introduce a new observable—a condensate fraction of Onsager vortices—to quantify the emergence of the vortex condensate.
Rahil N Valani +2 more
doaj +1 more source
Bose-Einstein condensation and chiral phase transition in linear sigma model
, 2005 With the linear sigma model, we have studied Bose-Einstein condensation and the chiral phase transition in the chiral limit for an interacting pion system. A $\mu-T$ phase diagram including these two phenomena is presented.
Ayala A +13 more
core +1 more source
Is a Trapped One-Dimensional Bose Gas a Luttinger Liquid?
, 1997 The low-energy fluctuations of a trapped, interacting quasi one-dimensional Bose gas are studied. Our considerations apply to experiments with highly anisotropic traps.
A. Griffin +24 more
core +1 more source
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 +9 more
wiley +1 more source
Dynamics of a Bose-Einstein Condensate of Excited Magnons
, 2013 The emergence of a non-equilibrium Bose-Einstein-like condensation of magnons in rf-pumped magnetic thin films has recently been experimentally observed. We present here a complete theoretical description of the non-equilibrium processes involved.
Luzzi, R. +2 more
core +1 more source
On the nature of Bose-Einstein condensation enhanced by localization [PDF]
, 2010 In a previous paper we established that for the perfect Bose gas and the mean-field Bose gas with an external random or weak potential, whenever there is generalized Bose-Einstein condensation in the eigenstates of the single particle Hamiltonian, there ...
Joseph V. Pulé +6 more
core +2 more sources
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 +3 more
wiley +1 more source
Ideal Bose Gas in Higher Dimensions [PDF]
مجلة جامعة النجاح للأبحاث العلوم الطبيعية, 2008 Some physical properties of the behavior of an ideal non- relativistic Bose gas in N – dimensional space are theoretically investigated. The general analytic expressions of the critical temperature Tc of Bose – Einstein condensation, and the high ...
Sami Al- Jaber
doaj +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 +10 more
wiley +1 more source
More Accurate Theory for Bose-Einstein Condensation Fraction
, 2007 In the thermodynamic limit the ratio of system size to thermal de Broglie wavelength tends to infinity and the volume per particle of the system is constant. Our familiar Bose-Einstein statistics is absolutely valid in the thermodynamic limit. For finite
Abe +33 more
core +1 more source