Fourier transform spectroscopy of a spin-orbit coupled Bose gas

Abstract

We describe a Fourier transform spectroscopy technique for directly measuring band structures, and apply it to a spin-1 spin-orbit coupled Bose-Einstein condensate. In our technique, we suddenly change the Hamiltonian of the system by adding a spin-orbit coupling interaction and measure populations in different spin states during the subsequent unitary evolution. We then reconstruct the spin and momentum resolved spectrum from the peak frequencies of the Fourier transformed populations. In addition, by periodically modulating the Hamiltonian, we tune the spin-orbit coupling strength and use our spectroscopy technique to probe the resulting dispersion relation. The frequency resolution of our method is limited only by the coherent evolution timescale of the Hamiltonian and can otherwise be applied to any system, for example, to measure the band structure of atoms in optical lattice potentials.

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Cited by in corpus (14)

• Realization of a fractional period adiabatic superlattice
• Unconventional topology with a Rashba spin-orbit coupled quantum gas
• Wave-packet Dynamics in Synthetic Non-Abelian Gauge Fields
• Continuously observing a dynamically decoupled spin-1 quantum gas
• High-precision multiband spectroscopy of ultracold fermions in a nonseparable optical lattice
• Quantum field theory of nematic transitions in spin orbit coupled spin-1 polar bosons
• Synthetic Hall ladder with tunable magnetic flux
• Enhanced transport of spin-orbit coupled Bose gases in disordered potentials
• Probing spectral features of quantum many-body systems with quantum simulators
• Strongly interacting spin-orbit coupled Bose-Einstein condensates in one dimension
• Topological spin-orbit-coupled fermions beyond rotating wave approximation
• Lifetime of Excitations in Atomic and Molecular Bose-Einstein Condensates
• Exploring kinetically induced bound states in triangular lattices with ultracold atoms: spectroscopic approach
• In situ magnetic-field stabilization for quantum-gas experiments