Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Dutta, Omjyoti"'
Publikováno v:
Phys. Rev. B 103, 134513 (2021)
Bosonic lattice systems with non-trivial interactions represent an intriguing platform to study exotic phases of matter. Here, we study the effects of extended correlated hopping processes in a system of bosons trapped in a lattice geometry. The inte
Externí odkaz:
http://arxiv.org/abs/2010.14459
We study the effects of assisted tunneling or correlated hopping between next nearest neighbours in a two species Bose-Hubbard system. The system is the bosonic analong of the fermionic system studied in Phys. Rev. Lett. {\bf 116}, 225303 (2016). Usi
Externí odkaz:
http://arxiv.org/abs/1912.13359
Autor:
Dutta, Omjyoti, Giedke, Geza
Publikováno v:
Phys. Rev. A 97, 023416 (2018)
We propose and analyze an electrostatic-optical nano-scale trap for cold diatomic polar molecules. The main ingredient of our proposal is an square-array of ferroelectric nano-rods {with alternating polarization}. We show that, in contrast to electro
Externí odkaz:
http://arxiv.org/abs/1710.06357
Publikováno v:
Phys. Rev. A 96, 033620 (2017)
We propose a realization of a synthetic Random Flux Model in a two-dimensional optical lattice. Starting from Bose-Hubbard Hamiltonian for two atom species we show how to use fast-periodic modulation of the system parameters to construct random gauge
Externí odkaz:
http://arxiv.org/abs/1706.07497
Publikováno v:
Phys. Rev. X 8, 021022 (2018)
We address the question whether the super-Heisenberg scaling for quantum estimation is realizable. We unify the results of two approaches. In the first one, the original system is compared with its copy rotated by the parameter dependent dynamics. If
Externí odkaz:
http://arxiv.org/abs/1702.05660
Publikováno v:
Phys. Rev. A 95, 053608 (2017)
Fundamental forces of Nature are described by field theories, also known as gauge theories, based on a local gauge invariance. The simplest of them is quantum electrodynamics (QED), which is an example of an Abelian gauge theory. Such theories descri
Externí odkaz:
http://arxiv.org/abs/1601.03303
Publikováno v:
Phys. Rev. A 93, 033631 (2016)
Using exact diagonalization methods we study possible phases in a one dimensional model of two differently populated fermionic species in a periodically driven optical lattice. The shaking amplitude and frequency are chosen to resonantly drive $s-p$
Externí odkaz:
http://arxiv.org/abs/1509.06700
Autor:
Chhajlany, Ravindra W., Grzybowski, Przemysław R., Stasińska, Julia, Lewenstein, Maciej, Dutta, Omjyoti
Publikováno v:
Phys. Rev. Lett. 116, 225303 (2016)
Ultracold fermions in a one-dimensional, spin-dependent, optical lattice are described by a non-standard Hubbard model with next-nearest-neighbour correlated hopping. Periodic driving of the lattice allows wide tuning of the system parameters. We sol
Externí odkaz:
http://arxiv.org/abs/1508.00404
Autor:
Dutta, Omjyoti
This thesis contains a study of ultracold paramagnetic atoms or polar molecules characterized by a long-range anisotropic dipolar interaction. We particularly focus on two aspects of ultracold dipolar gases. In the first problem the ground state prop
Externí odkaz:
http://hdl.handle.net/10150/195700
Publikováno v:
Phys. Rev. A 90, 063634 (2014)
We investigate the phase diagrams of theoretical models describing bosonic atoms in a lattice in the presence of randomly localized impurities. By including multiband and nonlinear hopping effects we enrich the standard model containing only the chem
Externí odkaz:
http://arxiv.org/abs/1410.1034