Dennis Hinrichs et.al.: Process-chain approach and its application to bosonic lattice systems
Dennis Hinrichs, Niklas Teichmann, Martin Holthaus
Process-chain approach and its application to bosonic lattice systems
- Date of Upload: 2010-03-12
Bose-Hubbard model, phase diagram, Mott insulator, superfluid, triangular, hexagonal
- We study the transition from a Mott insulator to a superfluid in the
Bose-Hubbard model at zero temperature for different lattice types. Converting Kato's perturbation series into an
efficient numerical algorithm capable of reaching high orders, we
obtain accurate critical parameters for any filling factor g and dimensionality d.
Furthermore we clarify the g- and the d-dependence of the critical value
and devise a method for extracting the critical value from the correlation function.
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Last Update: Fri Mar 12 14:32:33 2010