Direct and ultrafast probing of quantum many-body interaction and Mott-insulator transition through coherent two-dimensional spectroscopy
arXiv:2009.08598 · doi:10.1103/PhysRevB.104.115105
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.
arXiv comment6 pages, 4 figures
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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