Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy

Abstract

We investigate a momentum-resolved Raman spectroscopy technique which is able to probe the one-body spectral function and the quasi-particle states of a gas of strongly interacting ultracold atoms. This technique is inspired by Angle-Resolved Photo-Emission Spectroscopy, a powerful experimental probe of electronic states in solid-state systems. Quantitative examples of experimentally accessible spectra are given for the most significant regimes along the BEC-BCS crossover. When the theory is specialized to RF spectroscopy, agreement is found with recent experimental data. The main advantages of this Raman spectroscopy over existing techniques are pointed out.

arXiv comment10 pages, 10 figures

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Cited by in corpus (19)

• Realizing a scalable building block of a U(1) gauge theory with cold atomic mixtures
• Spectral Functions and rf Response of Ultracold Fermionic Atoms
• Observation of a smooth polaron-molecule transition in a degenerate Fermi gas
• Spectroscopy for cold atom gases in periodically phase-modulated optical lattices
• Comparative Study of BCS-BEC Crossover Theories above $T_c$: the Nature of the Pseudogap in Ultra-Cold Atomic Fermi Gases
• Measurement of spectral functions of ultracold atoms in disordered potentials
• Photoemission spectrum and effect of inhomogeneous pairing fluctuations in the BCS-BEC crossover regime of an ultracold Fermi gas
• Merging and alignment of Dirac points in a shaken honeycomb optical lattice
• Quasiparticle dynamics in a Bose insulator probed by inter-band Bragg spectroscopy
• Doppler Spectroscopy of an Ytterbium Bose-Einstein Condensate on the Clock Transition
• Exact spectral function of a Tonks-Girardeau gas in a lattice
• Thermometry and signatures of strong correlations from Raman spectroscopy of fermionic atoms in optical lattices
• Finding the phase diagram of strongly-correlated disordered bosons using quantum quenches
• Momentum-resolved Raman spectroscopy of bound molecules in ultracold Fermi gas
• Momentum-resolved Raman spectroscopy of non-interacting ultracold Fermi gas
• In Situ Momentum Distribution Measurement of a Quantum Degenerate Fermi Gas using Raman Spectroscopy
• Excitation spectra of strongly interacting bosons in the flat-band Lieb lattice
• Exact spectral function of the Tonks-Girardeau gas at finite temperature
• Second-order response theory of radio-frequency spectroscopy for cold atoms