Bose-Einstein Condensation and Many-Body Localization of Rotational Excitations of Polar Molecules

Abstract

We study theoretically the collective dynamics of rotational excitations of polar molecules loaded into an optical lattice in two dimensions. These excitations behave as hard-core bosons with a relativistic energy dispersion arising from the dipolar coupling between molecules. This has interesting consequences for the collective many-body phases. The rotational excitations can form a Bose-Einstein condensate at non-zero temperature, manifesting itself as a divergent $T_2$ coherence time of the rotational transition even in the presence of inhomogeneous broadening. The dynamical evolution of a dense gas of rotational excitations shows regimes of non-ergodicity, characteristic of many-body localization and localization protected quantum order.

5 pages, 4 figures

References in corpus (4)

• A High Phase-Space-Density Gas of Polar Molecules
• Anomalous Behavior of Spin Systems with Dipolar Interactions
• The Prediction of a Gapless Topological "Haldane Liquid" Phase in a One-Dimensional Cold Polar Molecular Lattice
• External field control of collective spin excitations in an optical lattice of ${}^2\Sigma$ molecules

Cited by in corpus (19)

• Many body localization and thermalization in quantum statistical mechanics
• Many-body localization edge in the random-field Heisenberg chain
• Quantum control of molecular rotation
• Many-body dynamics of dipolar molecules in an optical lattice
• Probing site-resolved correlations in a spin system of ultracold molecules
• Quantum nonergodicity and fermion localization in a system with a single-particle mobility edge
• Nature of Many-Body Localization and Transitions by Density Matrix Renormaliztion Group and Exact Diagonalization Studies
• Quantum correlations and entanglement in far-from-equilibrium spin systems
• Spin squeezing with short-range spin-exchange interactions
• Tunable itinerant spin dynamics with polar molecules
• Many-Body Localization in Spin Chain Systems with Quasiperiodic Fields
• Extending rotational coherence of interacting polar molecules in a spin-decoupled magic trap
• Many-body localization and mobility edge in a disordered Heisenberg spin ladder
• Scalable Spin Squeezing from Finite Temperature Easy-plane Magnetism
• Synchronization transition in dipole-coupled two-level systems with positional disorder
• An approach to quantum gas microscopy of polar molecules
• Tunable-spin-model generation with spin-orbit-coupled fermions in optical lattices
• Manipulating growth and propagation of correlations in dipolar multilayers: From pair production to bosonic Kitaev models
• Stable Collective Dynamics of Two-Level Systems Coupled by Dipole Interactions