Erasure-cooling, control, and hyper-entanglement of motion in optical tweezers

Coherently controlling the motion of single atoms in optical tweezers would enable new applications in quantum information science. To demonstrate this, we first prepare atoms in their motional ground state using a species-agnostic cooling mechanism that converts motional excitations into erasures -- errors with a known location. This cooling mechanism fundamentally outperforms idealized traditional sideband cooling, which we experimentally demonstrate. By coherently manipulating the resultant pure motional state, we perform mid-circuit readout and mid-circuit erasure detection via local shelving into motional superposition states. We finally entangle the motion of two atoms in separate tweezers and generate hyper-entanglement by preparing a simultaneous Bell state of motional and optical qubits, unlocking a large new class of quantum operations with neutral atoms. , , , # Data from: Erasure-cooling, control, and hyper-entanglement of motion in optical tweezers

[https://doi.org/10.5061/dryad.w9ghx3g18](https://doi.org/10.5061/dryad.w9ghx3g18)

## Description of the data and file structure

The raw data points for each graph presented in the paper are given in the attached data set.

The figures shown are: 

Figure 2: Improving motional ground state preparation with erasure correction cooling. The figure shows the probability to occupy the motional ground state after standard laser cooling, after erasure cooling with reset, and after erasure cooling with replacement. It further shows the ground state probability for different trap frequencies. 

Figure 3: Spin-motion transduction and mid-circuit readout. The figures shows the protocol for spin to motion conversion for mid-circuit readout. Ramsey coherence is measured at different parts of the protocol and a total coherence time of >100 ms is measured when applying a \"motion echo\" pulse sequence.

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