Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-07-24
Phys. Rev. A 81, 043615 (2010)
Physics
Condensed Matter
Quantum Gases
7 pages, 6 figures, results are generalized, new examples are added
Scientific paper
10.1103/PhysRevA.81.043615
Levy distribution, previously used to describe complex behavior of classical systems, is shown to characterize that of quantum many-body systems. Using two complimentary approaches, the canonical and grand-canonical formalisms, we discovered that the momentum profile of a Tonks-Girardeau gas, -- a one-dimensional gas of $N$ impenetrable (hard-core) bosons, harmonically confined on a lattice at finite temperatures, obeys Levy distribution. Finally, we extend our analysis to different confinement setups and demonstrate that the tunable Levy distribution properly reproduces momentum profiles in experimentally accessible regions. Our finding allows for calibration of complex many-body quantum states by using a unique scaling exponent.
Denisov Sergey
Hänggi Peter
Ponomarev Alexey V.
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