Thermometry and signatures of strong correlations from Raman spectroscopy of fermionic atoms in optical lattices

TL;DR

This paper introduces Raman spectroscopy techniques to measure temperature and analyze strong correlations in fermionic atoms within optical lattices, offering new experimental probes for quantum gas characterization.

Contribution

It presents novel Raman spectroscopy methods for direct temperature measurement and quasiparticle analysis in fermionic optical lattice systems.

Findings

Effective temperature measurement in weakly interacting fermionic gases.

Ability to probe quasiparticle properties and Hubbard bands.

Applicable to metallic and Mott-insulating states.

Abstract

We propose a method to directly measure the temperature of a gas of weakly interacting fermionic atoms loaded into an optical lattice. This technique relies on Raman spectroscopy and is applicable to experimentally relevant temperature regimes. Additionally, we show that a similar spectroscopy scheme can be used to obtain information on the quasiparticle properties and Hubbard bands of the metallic and Mott-insulating states of interacting fermionic spin mixtures. These two methods provide experimentalists with novel probes to accurately characterize fermionic quantum gases confined to optical lattices.