Results 121 to 130 of about 5,364 (225)

Observation of dynamic atom-atom correlation in liquid helium in real space

Nature Communications, 2017
Liquid helium can be treated as an ideal gas or a condensed liquid and displays intriguing features like Bose–Einstein condensation. Here the authors show that roton excitation reveals information on real space dynamic atom-atom correlations in ...
W. Dmowski, S. O. Diallo, K. Lokshin, G. Ehlers, G. Ferré, J. Boronat, T. Egami   +6 more
doaj   +1 more source

Superradiant MeV γ Scattered by a Room-Temperature Spinor Quantum Fluid

Crystals, 2017
Recent reports have revealed the rich long-lived Mossbauer phenomenon of 93mNb, in which it has long been speculated that the delocalized 93mNb undergoes Bose-Einstein condensation following an increase in the 93mNb density beyond the threshold of 1012 ...
Yao Cheng, Ting-Han Lin, Chih-Hao Lee, Shun-Chi Wu   +3 more
doaj   +1 more source

Carnot Cycles in a Harmonically Confined Ultracold Gas across Bose-Einstein Condensation. [PDF]

Entropy (Basel), 2023
Reyes-Ayala I, Miotti M, Hemmerling M, Dubessy R, Perrin H, Romero-Rochin V, Bagnato VS.   +6 more
europepmc   +1 more source

Dynamics of Fluctuating Bose–Einstein Condensates

Journal of Low Temperature Physics, 2001
We present a generalized Gross-Pitaevskii equation that describes also the dissipative dynamics of a trapped partially Bose condensed gas. It takes the form of a complex nonlinear Schrödinger equation with noise. We consider an approximation to this Langevin field equation that preserves the correct equilibrium for both the condensed and the ...
Bijlsma, M.J., Stoof, H.T.C.
openaire   +5 more sources

Optically nonlinear spatial and spectral processes in semiconductor microcavities

, 2009
This thesis presents experimental analysis of polariton dynamics in semiconductor umicrocavities. A microcavity is a monolithic structure composed of two distribnted Bragg reflectors which are separated by a layer of active material.
Grundy, Alastair J D, Grundy, Alastair J.D.   +1 more
core  

The Paradox of Bose-Einstein Condensation

, 2023
The paradox of Bose-Einstein condensation is that phenomena such as the $\lambda$-transition heat capacity and superfluid flow are macroscopic, whereas the occupancy of the ground state is microscopic.
Attard, Phil
core  

Condensation of excitons in Cu2O at ultracold temperatures: experiment and theory

New Journal of Physics, 2012
We present experiments on the luminescence of excitons confined in a potential trap at milli-Kelvin bath temperatures under continuous-wave (cw) excitation.
Heinrich Stolz, Rico Schwartz, Frank Kieseling, Sunipa Som, Maria Kaupsch, Siegfried Sobkowiak, Dirk Semkat, Nobuko Naka, Thomas Koch, Holger Fehske   +9 more
doaj   +1 more source

Double dome structure of the Bose-Einstein condensation in diluted S = 3/2 quantum magnets. [PDF]

Nat Commun, 2023
Watanabe Y, Miyake A, Gen M, Mizukami Y, Hashimoto K, Shibauchi T, Ikeda A, Tokunaga M, Kurumaji T, Tokunaga Y, Arima TH.   +10 more
europepmc   +1 more source

Double magnetic resonance in MnCO₃ [PDF]

Magnetic Resonance in Solids, 2015
Results of experiments on MnCO3 investigations by double magnetic resonance are presented. Additional mode of oscillation has been observed in a created Bose-Einstein condensation of magnons state in MnCO3.
Yu.M. Bunkov, A.V. Klochkov, T.R. Safin, K.R. Safiullin, M.S. Tagirov
doaj  

Supermode-density-wave-polariton condensation with a Bose–Einstein condensate in a multimode cavity

Nature Communications, 2017
When a single mode optical cavity is coupled to a Bose-Einstein condensate, one usually observes a single mode of light when strongly pumped. Here the authors observe a supermode in the output of a multimode cavity and relate this to a signature of a ...
Alicia J. Kollár, Alexander T. Papageorge, Varun D. Vaidya, Yudan Guo, Jonathan Keeling, Benjamin L. Lev   +5 more
doaj   +1 more source