Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Magiropoulos, M."'
Publikováno v:
Journal of Low Temperature Physics, 2022
We investigate the many-body state and the static and the dynamic behaviour of the pair-correlation function of a Bose-Einstein condensate with a finite atom number, which is confined in a quasi-one-dimensional toroidal/annular potential, both for re
Externí odkaz:
http://arxiv.org/abs/2104.11916
Autor:
Vasilakis, G., Roussou, A., Smyrnakis, J., Magiropoulos, M., von Klitzing, W., Kavoulakis, G. M.
Publikováno v:
Phys. Rev. A 100, 023606 (2019)
We consider a weakly-interacting Bose-Einstein condensate that rotates in either a harmonic, or a weakly-anharmonic trapping potential. Performing numerical calculations, we investigate the behaviour of the gas in these two cases as the angular momen
Externí odkaz:
http://arxiv.org/abs/1905.09594
Autor:
Roussou, A., Smyrnakis, J., Magiropoulos, M., Efremidis, N. K., von Klitzing, W., Kavoulakis, G. M.
Publikováno v:
Phys. Rev. A 99, 053613 (2019)
When a Bose-Einstein condensate rotates in a purely harmonic potential with an angular frequency which is close to the trap frequency, its many-body state becomes highly correlated, with the most well-known being the bosonic Laughlin state. To take i
Externí odkaz:
http://arxiv.org/abs/1810.07609
Autor:
Roussou, A., Smyrnakis, J., Magiropoulos, M., Efremidis, Nikolaos K., Kavoulakis, G. M., Sandin, P., Ögren, M., Gulliksson, M.
Publikováno v:
New J. Phys. 20, 045006 (2018)
We study the rotational properties of a two-component Bose-Einstein condensed gas of distinguishable atoms which are confined in a ring potential using both the mean-field approximation, as well as the method of diagonalization of the many-body Hamil
Externí odkaz:
http://arxiv.org/abs/1710.11441
Publikováno v:
Phys. Rev. A 95, 033606 (2017)
Motivated by recent experiments on Bose-Einstein condensed atoms which rotate in annular/toroidal traps we study the effect of the finiteness of the atom number $N$ on the states of lowest energy for a fixed expectation value of the angular momentum,
Externí odkaz:
http://arxiv.org/abs/1611.09256
Publikováno v:
Phys. Rev. E 95, 012142 (2017)
Motivated by numerous experiments on Bose-Einstein condensed atoms which have been performed in tight trapping potentials of various geometries (elongated and/or toroidal/annular), we develop a general method which allows us to reduce the correspondi
Externí odkaz:
http://arxiv.org/abs/1609.04679
Autor:
Roussou, A., Tsibidis, G. D., Smyrnakis, J., Magiropoulos, M., Efremidis, Nikolaos K., Jackson, A. D., Kavoulakis, G. M.
Publikováno v:
Phys. Rev. A 91, 023613 (2015)
We consider a Bose-Einstein condensed cloud of atoms which rotate in a toroidal/annular potential. Assuming one-dimensional motion, we evaluate the critical frequencies associated with the effect of hysteresis and the critical coupling for stability
Externí odkaz:
http://arxiv.org/abs/1412.4512
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 47, 215302 (2014)
We present variational and numerical solutions for the problem of stability of persistent currents in a two-component Bose-Einstein condensate of distinguishable atoms which rotate in a ring potential. We consider the general class of solutions of co
Externí odkaz:
http://arxiv.org/abs/1402.6086
Autor:
Wu, Z., Zaremba, E., Smyrnakis, J., Magiropoulos, M., Efremidis, Nikolaos K., Kavoulakis, G. M.
Publikováno v:
Phys. Rev. A 92, 033630 (2015)
We analyze the mean-field yrast spectrum of a two-component Bose gas in the ring geometry with arbitrary interaction asymmetry. Of particular interest is the possibility that the yrast spectrum develops local minima at which persistent superfluid flo
Externí odkaz:
http://arxiv.org/abs/1312.0869
Publikováno v:
Phys. Rev. A 87, 013603 (2013)
We derive solitary-wave solutions within the mean-field approximation in quasi-one-dimensional binary mixtures of Bose-Einstein condensates under periodic boundary conditions, for the case of an effective repulsive interatomic interaction. The partic
Externí odkaz:
http://arxiv.org/abs/1207.6489