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Robust Bilayer Charge Pumping for Spin- and Density-Resolved Quantum Gas Microscopy.

Joannis Koepsell^1,2, Sarah Hirthe^1,2, Dominik Bourgund^1,2

¹Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.

Physical Review Letters

|July 18, 2020

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We developed a new bilayer readout for quantum gas microscopy, enabling detailed spin and density measurements in 2D quantum systems. This technique overcomes previous limitations, allowing for arbitrary geometries and advanced applications.

Area of Science:

Quantum simulation
Quantum many-body physics
Quantum gas microscopy

Background:

Quantum gas microscopy offers microscopic insights into quantum many-body systems.
Existing spin-resolved readout methods are limited by atomic species and lattice constraints.

Purpose of the Study:

To present a novel, high-fidelity bilayer readout method.
To enable full spin- and density-resolved quantum gas microscopy for 2D systems of arbitrary geometry.

Main Methods:

Utilizes Stern-Gerlach splitting into adjacent layers of a vertical superlattice.
Employs charge pumping for precise layer separation (21 μm).
Enables independent high-resolution imaging of each layer.

Main Results:

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Demonstrates spin- and density-resolved imaging of 2D Fermi-Hubbard systems.
Achieves high fidelity in bilayer readout.
Confirms independent imaging capability of separated layers.

Conclusions:

The novel bilayer readout overcomes limitations of previous methods.
Enables versatile quantum gas microscopy for diverse 2D quantum systems.
Opens possibilities for entropy engineering, spectroscopy, and tunable bilayer systems.