Bose-Einstein Condensates in Strongly Disordered Traps

by: T Nattermann, VL Pokrovsky

Physical Review Letters, Vol. 100, No. 6. (2008)

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Abstract

A Bose-Einstein condensate in an external potential consisting of a superposition of a harmonic and a random potential is considered theoretically. From a semiquantitative analysis we find the size, shape, and excitation energy as a function of the disorder strength. For positive scattering length and sufficiently strong disorder the condensate decays into fragments each of the size of the Larkin length . This state is stable over a large range of particle numbers. The frequency of the breathing mode scales as 1/2. For negative scattering length a condensate of size may exist as a metastable state. These findings are generalized to anisotropic traps.

@article{citeulike:2387163, abstract = {A Bose-Einstein condensate in an external potential consisting of a superposition of a harmonic and a random potential is considered theoretically. From a semiquantitative analysis we find the size, shape, and excitation energy as a function of the disorder strength. For positive scattering length and sufficiently strong disorder the condensate decays into fragments each of the size of the Larkin length . This state is stable over a large range of particle numbers. The frequency of the breathing mode scales as 1/2. For negative scattering length a condensate of size may exist as a metastable state. These findings are generalized to anisotropic traps.}, author = {Nattermann, T. and Pokrovsky, V. L. }, citeulike-article-id = {2387163}, doi = {10.1103/PhysRevLett.100.060402}, journal = {Physical Review Letters}, keywords = {atomic-physics, boson, theory}, number = {6}, posted-at = {2008-02-15 19:15:51}, priority = {3}, publisher = {APS}, title = {Bose-Einstein Condensates in Strongly Disordered Traps}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000100000006060402000001\&idtype=cvips\&gifs=yes}, volume = {100}, year = {2008} }

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TY - JOUR ID - citeulike:2387163 L3 - citeulike-article-id:2387163 TI - Bose-Einstein Condensates in Strongly Disordered Traps JF - Physical Review Letters VL - 100 IS - 6 PB - APS N2 - A Bose-Einstein condensate in an external potential consisting of a superposition of a harmonic and a random potential is considered theoretically. From a semiquantitative analysis we find the size, shape, and excitation energy as a function of the disorder strength. For positive scattering length and sufficiently strong disorder the condensate decays into fragments each of the size of the Larkin length . This state is stable over a large range of particle numbers. The frequency of the breathing mode scales as 1/2. For negative scattering length a condensate of size may exist as a metastable state. These findings are generalized to anisotropic traps. KW - atomic-physics KW - boson KW - theory AU - Nattermann, T AU - Pokrovsky, VL PY - 2008/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000006060402000001&idtype=cvips&gifs=yes ER -

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