Zobrazeno 1 - 10
of 209
pro vyhledávání: '"Di Liberto, M."'
Publikováno v:
Phys. Rev. A 97, 023614 (2018)
Both mixtures of atomic Bose-Einstein condensates and systems with atoms trapped in optical lattices have been intensely explored theoretically, mainly due to the exceptional developments on the experimental side. We investigate the properties of ult
Externí odkaz:
http://arxiv.org/abs/1711.10234
Publikováno v:
Phys. Rev. Lett. 120, 073201 (2018)
We study the low-energy excitations of the Bose-Hubbard model in the strongly-interacting superfluid phase using a Gutzwiller approach and extract the single-particle and single-hole excitation amplitudes for each mode. We report emergent mode-depend
Externí odkaz:
http://arxiv.org/abs/1709.06575
Publikováno v:
Eur. Phys. J. Special Topics 226, 2751 (2017)
We study the bosonic two-body problem in a Su-Schrieffer-Heeger dimerized chain with on-site and nearest-neighbor interactions. We find two classes of bound states. The first, similar to the one induced by on-site interactions, has its center of mass
Externí odkaz:
http://arxiv.org/abs/1612.02601
Publikováno v:
Phys. Rev. A 94, 062704 (2016)
We consider two interacting bosons in a dimerized Su-Schrieffer-Heeger (SSH) lattice. We identify a rich variety of two-body states. In particular, for open boundary conditions and moderate interactions, edge bound states (EBS) are present even for t
Externí odkaz:
http://arxiv.org/abs/1608.07341
Publikováno v:
Phys. Rev. Lett. 117, 163001 (2016)
Topological states of matter are peculiar quantum phases showing different edge and bulk transport properties connected by the bulk-boundary correspondence. While non-interacting fermionic topological insulators are well established by now and have b
Externí odkaz:
http://arxiv.org/abs/1604.06055
Publikováno v:
Nature Communications 5, 5735 (2014)
The control of transport properties is a key tool at the basis of many technologically relevant effects in condensed matter. The clean and precisely controlled environment of ultracold atoms in optical lattices allows one to prepare simplified but in
Externí odkaz:
http://arxiv.org/abs/1412.4040
Publikováno v:
Phys. Rev. A 90, 023634 (2014)
We describe the behavior of a system of fermionic atoms loaded in a bipartite one-dimensional optical lattice that is under the action of an external time-periodic driving force. By using Floquet theory, an effective model with renormalized hopping c
Externí odkaz:
http://arxiv.org/abs/1405.4756
Publikováno v:
Phys. Rev. A 89, 013624 (2014)
By using a modulated magnetic field in a Feshbach resonance for ultracold fermionic atoms in optical lattices, we show that it is possible to engineer a class of models usually referred to as correlated-hopping models. These models differ from the Hu
Externí odkaz:
http://arxiv.org/abs/1310.7959
Publikováno v:
In International Journal of Heat and Mass Transfer April 2019 132:1074-1086
Publikováno v:
Phys. Rev. A 84, 013607 (2011)
We consider ultracold bosons in a 2D square optical lattice described by the Bose-Hubbard model. In addition, an external time-dependent sinusoidal force is applied to the system, which shakes the lattice along one of the diagonals. The effect of the
Externí odkaz:
http://arxiv.org/abs/1104.4350