17-22 July 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

One- and two-axis squeezing via laser coupling in an atomic Fermi-Hubbard model

18 Jul 2022, 17:00
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Degenerate gases, many-body physics, and quantum simulation Poster session

Speaker

Tanausú Hernández Yanes (Institute of Physics PAS, Aleja Lotnikow 32/46, 02-668 Warszawa, Poland)

Description

We study the Ramsey-type spectroscopy and the production of spin-squeezed states with ultra-cold atomic fermions described by the Fermi-Hubbard model in the Mott insulating regime. We show activation of two twisting mechanisms by a position-dependent laser coupling between internal degrees of freedom of atoms. A single laser coupling simulates the one-axis twisting model with the axis and direction of squeezing determined by the value of phase defining the atom-laser coupling. As such, adding a second laser beam with an adequately chosen phase paves the way to simulate the two-axis counter-twisting model, allowing reaching the Heisenberg-limited level of squeezing. The scheme can be implemented readily in state-of-the-art optical lattice clocks.

Fermi-Hubbard model (FHM) for atoms in optical lattices or tweezer a    rrays with nearest-neighbor tunneling rate $J$, on-site interaction $U$ and     additional coupling between atomic internal degrees of freedom with position    -dependent strength $\Omega e^{i \phi j}$. The coupling can be realized with     one or two off-resonant laser beams.

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Presenter name Hernández Yanes, Tanausú

Primary authors

Tanausú Hernández Yanes (Institute of Physics PAS, Aleja Lotnikow 32/46, 02-668 Warszawa, Poland) Marcin Płodzień (ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain) Mažena Mackoit Sinkevičienė (Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio 3, LT-10257, Vilnius, Lithuania) Giedrius Žlabys (Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio 3, LT-10257, Vilnius, Lithuania) Prof. Gediminas Juzeliūnas (Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio 3, LT-10257, Vilnius, Lithuania) Prof. Emilia Witkowska (Institute of Physics PAS, Aleja Lotnikow 32/46, 02-668 Warszawa, Poland)

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