2010

Polylogs, thermodynamics and scaling functions of one-dimensional quantum many-body systems

Guan, X. -W., Batchelor, M. T.

Understand

We demonstrate that the thermodynamics of one-dimensional Lieb-Liniger bosons can be accurately calculated in analytic fashion using the polylog function in the framework of the thermodynamic Bethe ansatz.

  • The approach does away with the need to numerically solve the thermodynamic Bethe ansatz (Yang-Yang) equation.
  • The expression for the equation of state allows the exploration of Tomonaga-Luttinger liquid physics and quantum criticality in an archetypical quantum system.
  • In particular, the low-temperature phase diagram is obtained, along with the scaling functions for the density and compressibility.

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