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Fragility of the Laughlin state in an anharmonically-trapped Bose-Einstein condensate
A. Roussou, J. Smyrnakis, M. Magiropoulos +3
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…
Excitation spectrum of a mixture of two Bose gases confined in a ring potential with interaction asymmetry
A. Roussou, J. Smyrnakis, M. Magiropoulos +5
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 approxim…
Rotating Bose-Einstein condensates with a finite number of atoms confined in a ring potential: Spontaneous symmetry breaking, beyond the mean-field approximation
A. Roussou, J. Smyrnakis, M. Magiropoulos +2
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 on the states o…
Hysteresis and metastability of Bose-Einstein condensed clouds of atoms confined in ring potentials
A. Roussou, G. D. Tsibidis, J. Smyrnakis +4
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…
Persistent currents in a two-component Bose-Einstein condensate confined in a ring potential
J. Smyrnakis, M. Magiropoulos, Nikolaos K. Efremidis +1
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…
Mean-field yrast spectrum and persistent currents in a two-component Bose gas with interaction asymmetry
Z. Wu, E. Zaremba, J. Smyrnakis +3
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 y…