Speaker
Description
Generation, storage and utilization of correlated many-body quantum states are crucial objectives of future quantum technologies and metrology. Such states can be generated by the spin-squeezing protocols. In this work [1-2], we consider the dynamical generation of spin squeezing in a lattice system composed of ultra-cold fermionic atoms in the Mott phase at half-filling. To induce the generation of squeezing, there is a position-dependent laser coupling between the internal degrees of freedom of atoms. We study the Ramsey-type spectroscopy scheme in which the atom-light coupling is turned on during the interrogation time. By choosing an appropriate propagation direction of the laser beam inducing the spin-orbit coupling and acting on a fermionic lattice with a sequence of such laser pulses we expect to realize efficient spin-squeezing. We show analytically, using the perturbation theory, how the Fermi-Hubbard model with the atom-light coupling effectively simulates the one-axis twisting model with the tunable axis of squeezing. This paves the way for the simulation of the famous two-axis counter-twisting model when two laser couplings are used during interrogation time. The presented method can be applied in optical clocks.
References
[1] T. Hernandez Yanes, M. Płodzień, M. Mackoit-Sinkevičienė, G. Žlabys, G. Juzeliūnas, E.Witkowska, Phys. Rev. Lett. 129, 090403 (2022).
[2] T. Hernandez Yanes, G. Žlabys M. Płodzień, D. Burba, M. Mackoit-Sinkevičienė, E. Witkowska, G. Juzeliūnas, arXiv:2302.09829 (2023).
