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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster: Quantum Optics and Photonics I

Q 25.21: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Atrium Informatik

The simulation of phase trasnsion from spin-mott to xy-ferromagnatic — •Hanyi Wang — Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

We simulate a two-component Bose-Hubbard model in 1D optical lattice with density matrix renormalization group method.We start from a spin-mott phase,where each site is occupied by one spin-up and one spin-down atom.By adiabaticaliy ramping down the spin-dependent lattice, the spin mott phase can transfer to xy-ferromagnetic phase .We calculate the Luttinger parameter using the exponential relationship between the magnetic correlation function and the associated length.And then phase-transition point is estimated.We get the phase diagram by mappng all the phase-transition point.