Direct and ultrafast probing of quantum many-body interaction and Mott-insulator transition through coherent two-dimensional spectroscopy

Abstract

Interactions between particles in quantum many-body systems play a crucial role in determining the electric, magnetic, optical, and thermal properties of the system. The recent progress in the laser-pulse technique has enabled the manipulations and measurements of physical properties on ultrafast timescales. Here, we propose a method for the direct and ultrafast probing of quantum many-body interaction through coherent two-dimensional (2D) spectroscopy. Up to a moderate interaction strength, the inter-particle interaction manifests itself in the emergence of off-diagonal peaks in the 2D spectrum before all the peaks coalesce into a single diagonal peak as the system approaches the Mott-insulating phase in the strongly interacting regime. The evolution of the 2D spectrum as a function of the time delay between the second and third laser pulses can provide important information on the ultrafast time variation of the interaction.

6 pages, 4 figures

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Subwavelength vacuum lattices and atom-atom interactions in photonic crystals
• Imaging the Mott Insulator Shells using Atomic Clock Shifts
• New frontiers with quantum gases of polar molecules
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Cited by in corpus (7)

• Extracting spinon self-energies from two-dimensional coherent spectroscopy
• Two-dimensional coherent spectrum of interacting spinons from matrix-product states
• Nonlinear response of the Kitaev honeycomb lattice model in a weak magnetic field
• Unique Signatures of Topological Phases in Two-Dimensional THz Spectroscopy
• Multidimensional coherent spectroscopy of correlated lattice systems
• Extracting Nonlinear Dynamical Response Functions from Time Evolution
• The Kekulé-Kitaev model: linear and non-linear responses and magnetic field effects