Exciting collective oscillations in a trapped 1D gas

Exciting collective oscillations in a trapped 1D gas

We report on the realization of a trapped one-dimensional Bose gas and its characterization by means of measuring its lowest lying collective excitations. The quantum degenerate Bose gas is prepared in a 2D optical lattice, and we find the ratio of the frequencies of the lowest compressional (breath...

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Veröffentlicht in:Physical review letters 2003-12, Vol.91 (25), p.250402-250402, Article 250402
Hauptverfasser: Moritz, Henning, Stöferle, Thilo, Köhl, Michael, Esslinger, Tilman
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container_title Physical review letters
container_volume 91
creator Moritz, Henning
Stöferle, Thilo
Köhl, Michael
Esslinger, Tilman
description We report on the realization of a trapped one-dimensional Bose gas and its characterization by means of measuring its lowest lying collective excitations. The quantum degenerate Bose gas is prepared in a 2D optical lattice, and we find the ratio of the frequencies of the lowest compressional (breathing) mode and the dipole mode to be (omega(B)/omega(D))(2) approximately 3.1, in accordance with the Lieb-Liniger and mean-field theory. For a thermal gas we measure (omega(B)/omega(D))(2) approximately 4. By heating the quantum degenerate gas, we have studied the transition between the two regimes. For the lowest number of particles attainable in the experiment the kinetic energy of the system is similar to the interaction energy, and we enter the strongly interacting regime.
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title Exciting collective oscillations in a trapped 1D gas
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