Dynamical disentangling and cooling of atoms in bilayer optical lattices

Abstract

We show how experimentally available bilayer lattice systems can be used to prepare quantum many-body states with exceptionally low entropy in one layer, by dynamically disentangling the two layers. This disentangling operation moves one layer - subsystem $A$ - into a regime where excitations in $A$ develop a single-particle gap. As a result, this operation maps directly to cooling for subsystem $A$, with entropy being shuttled to the other layer. For both bosonic and fermionic atoms, we study the dynamics of this process, and show that disentangling can be realised cleanly in ongoing optical lattice experiments. The corresponding entanglement entropies are directly measurable with quantum gas microscopes, and as a tool for producing lower-entropy states, this technique opens a range of applications beginning with simplifying production of anti-ferromagnetically ordered states of fermions.

4 pages + supplementary material, 4 figures

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Cited by in corpus (15)

• Tools for quantum simulation with ultracold atoms in optical lattices
• Imaging magnetic polarons in the doped Fermi-Hubbard model
• Microscopic evolution of doped Mott insulators from polaronic metal to Fermi liquid
• Cooling and entangling ultracold atoms in optical lattices
• Exploration of doped quantum magnets with ultracold atoms
• Quantum state engineering of a Hubbard system with ultracold fermions
• Robust Bilayer Charge-Pumping for Spin- and Density-Resolved Quantum Gas Microscopy
• Engineering and probing non-Abelian chiral spin liquids using periodically driven ultracold atoms
• Quantum Virtual Cooling
• Thermodynamics and magnetism in the 2D-3D crossover of the Hubbard model
• Preparation of Low Entropy Correlated Many-body States via Conformal Cooling Quenches
• Flat-band-induced superconductivity in synthetic bilayer optical lattices
• Dissipative cooling of spin chains by a bath of dipolar particles
• Out-of-Equilibrium Dynamics in the Two-Component Bose-Hubbard Model
• Protocol for autonomous rearrangement of cold atoms into low-entropy configurations