Fast, high-fidelity neutral atom qubit detection with optical Fock states
POSTER
Abstract
State readout remains a significant bottleneck in neutral atom quantum computing, with
timescales often exceeding gate operations by orders of magnitude. We propose a readout pro-
tocol utilizing trains of optical Fock states to perform absorption spectroscopy, circumventing the
shot-noise limits inherent to classical coherent states. By analyzing the binomial statistics of single-
photon transmission, we show that high-fidelity readout can be achieved with tens of incident photons.
This approach allows for sub-10 μs detection times in free space, while drastically reducing heating and crosstalk
compared to standard fluorescence methods. We present a theoretical framework and numerical simulations
mapping the fidelity across the parameter space of atom-photon coupling and collection efficiency.
timescales often exceeding gate operations by orders of magnitude. We propose a readout pro-
tocol utilizing trains of optical Fock states to perform absorption spectroscopy, circumventing the
shot-noise limits inherent to classical coherent states. By analyzing the binomial statistics of single-
photon transmission, we show that high-fidelity readout can be achieved with tens of incident photons.
This approach allows for sub-10 μs detection times in free space, while drastically reducing heating and crosstalk
compared to standard fluorescence methods. We present a theoretical framework and numerical simulations
mapping the fidelity across the parameter space of atom-photon coupling and collection efficiency.
*We acknowledge support from NSF Grant No. 2016136 for the QLCI center Hybrid Quantum Architectures and Networks and the U.S.Department of Energy Office of Science National Quantum Information Science Research Centers as part of the Q-NEXT center, as well as support from NSF Grant No. 2228725.
Presenters
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Faisal Herzallah
- University of Wisconsin - Madison