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2022-10-20
Research highlights

Spin-squeezed states: uni- and bi-axial compression of atoms by laser coupling in the Fermi-Hubbard atomic model

Physical Review Letters 129, 090403 (2022)

Graphic showing the mechanism of compression in ultra-cold gases of fermion atoms placed in periodic optical lattices (made by Dr. Mazena Mackoit Sinkevičienė from Vilnius University).

Producing, storing and exploiting correlated many-body quantum states are key goals of future quantum technologies and metrology. Such states can be generated over time from the initial coherent states by the so-called dynamic
protocols. In our work, we consider the generation of highly correlated states in a system composed of ultracold fermionic atoms placed in the periodic potential of optical lattices in the Mott phase.

We show how the coupling of atoms with an external laser beam introduces correlations between single atoms, leading to the formation of highly correlated quantum states, the so-called spin-contracted states. We explain the mechanism of correlation formation over time. We also show that our setup can simulate two different protocols for generating squeezed states and how our predictions can be verified in current cold atom experiments.


Publications

T. Hernández Yanes, M. Płodzień, M. Mackoit Sinkevičienė, G. Žlabys, G. Juzeliūnas, and E. Witkowska

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Turbulent motion of flowing light

 Nature Photonics in print

The turbulent motion of fluids is probably the most complicated problem in Physics, but also one of the most important. Indeed, even today it is extremely difficult to make predictions about the turbulent dynamics of fluids. Yet turbulence is fundamental for describing, for example, the aerodynam...

Intrinsic Magnetic (EuIn)As Nanowire Shells with a Unique Crystal Structure

Nano Letters 22, 8925 (2022)

The structures obtained can serve as a platform for obtaining one-dimensional states with broken time-reversal symmetry, including topological superconducting states.

Cooperative Effect of Electron Spin Polarization in Chiral Molecules Studied with Non-Spin-Polarized Scanning Tunneling Microscopy

ACS Appl. Mater. Interfaces 14, 38013 (2022)

In this study we showed that our high spatial and energy resolution of the STM setup allows the correlation of structural details with the electron transmission properties across the hybrid junction.
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