Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Uehlinger, Thomas"'
Autor:
Messer, Michael, Desbuquois, Rémi, Uehlinger, Thomas, Jotzu, Gregor, Huber, Sebastian, Greif, Daniel, Esslinger, Tilman
Publikováno v:
Phys. Rev. Lett. 115, 115303 (2015)
We realize and study the ionic Hubbard model using an interacting two-component gas of fermionic atoms loaded into an optical lattice. The bipartite lattice has honeycomb geometry with a staggered energy-offset that explicitly breaks the inversion sy
Externí odkaz:
http://arxiv.org/abs/1503.05549
Autor:
Jotzu, Gregor, Messer, Michael, Desbuquois, Rémi, Lebrat, Martin, Uehlinger, Thomas, Greif, Daniel, Esslinger, Tilman
Publikováno v:
Nature 515, 237-240 (2014)
The Haldane model on the honeycomb lattice is a paradigmatic example of a Hamiltonian featuring topologically distinct phases of matter. It describes a mechanism through which a quantum Hall effect can appear as an intrinsic property of a band-struct
Externí odkaz:
http://arxiv.org/abs/1406.7874
Autor:
Imriška, Jakub, Iazzi, Mauro, Wang, Lei, Gull, Emanuel, Greif, Daniel, Uehlinger, Thomas, Jotzu, Gregor, Tarruell, Leticia, Esslinger, Tilman, Troyer, Matthias
Publikováno v:
Phys. Rev. Lett. 112, 115301 (2014)
We study the 3D Hubbard model with anisotropic nearest neighbor tunneling amplitudes using the dynamical cluster approximation and compare the results with a quantum simulation experiment using ultracold fermions in an optical lattice, focussing on m
Externí odkaz:
http://arxiv.org/abs/1309.7362
Autor:
Uehlinger, Thomas, Jotzu, Gregor, Messer, Michael, Greif, Daniel, Hofstetter, Walter, Bissbort, Ulf, Esslinger, Tilman
Publikováno v:
Phys. Rev. Lett. 111, 185307 (2013)
We create an artificial graphene system with tunable interactions and study the crossover from metallic to Mott insulating regimes, both in isolated and coupled two-dimensional honeycomb layers. The artificial graphene consists of a two-component spi
Externí odkaz:
http://arxiv.org/abs/1308.4401
Publikováno v:
Science 340, 1307-1310 (2013)
The exchange coupling between quantum mechanical spins lies at the origin of quantum magnetism. We report on the observation of nearest-neighbor magnetic spin correlations emerging in the many-body state of a thermalized Fermi gas in an optical latti
Externí odkaz:
http://arxiv.org/abs/1212.2634
Autor:
Uehlinger, Thomas, Greif, Daniel, Jotzu, Gregor, Tarruell, Leticia, Esslinger, Tilman, Wang, Lei, Troyer, Matthias
Publikováno v:
Eur. Phys. J. Special Topics 217, 121-133 (2013)
We report on Bloch-Zener oscillations of an ultracold Fermi gas in a tunable honeycomb lattice. The quasi-momentum distribution of the atoms is measured after sequentially passing through two Dirac points. We observe a double-peak feature in the tran
Externí odkaz:
http://arxiv.org/abs/1210.0904
Publikováno v:
Nature 483, 302-305 (2012)
Dirac points lie at the heart of many fascinating phenomena in condensed matter physics, from massless electrons in graphene to the emergence of conducting edge states in topological insulators [1, 2]. At a Dirac point, two energy bands intersect lin
Externí odkaz:
http://arxiv.org/abs/1111.5020
Publikováno v:
Phys. Rev. Lett. 106, 145302 (2011)
We demonstrate a probe for nearest-neighbor correlations of fermionic quantum gases in optical lattices. It gives access to spin and density configurations of adjacent sites and relies on creating additional doubly occupied sites by perturbative latt
Externí odkaz:
http://arxiv.org/abs/1012.0845
Autor:
Jördens, Robert, Tarruell, Leticia, Greif, Daniel, Uehlinger, Thomas, Strohmaier, Niels, Moritz, Henning, Esslinger, Tilman, De Leo, Lorenzo, Kollath, Corinna, Georges, Antoine, Scarola, Vito, Pollet, Lode, Burovski, Evgeni, Kozik, Evgeny, Troyer, Matthias
Publikováno v:
Phys. Rev. Lett. 104, 180401 (2010)
We perform a quantitative simulation of the repulsive Fermi-Hubbard model using an ultracold gas trapped in an optical lattice. The entropy of the system is determined by comparing accurate measurements of the equilibrium double occupancy with theore
Externí odkaz:
http://arxiv.org/abs/0912.3790
Publikováno v:
Science, 2013 Jun . 340(6138), 1307-1310.
Externí odkaz:
http://dx.doi.org/10.1126/science.1236362
