Gaussian operations on bosonic systems have a strict cooling bound, but non-Gaussian p-excitation exchange achieves p-fold better performance.
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2025 2verdicts
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OREO is a numerically optimized protocol for direct estimation of arbitrary observables in quantum harmonic oscillators via mapping to an ancillary qubit in bosonic cQED.
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Sub-Bath Cooling in Bosonic Systems: Gaussian Constraints and Non-Gaussian Enhancements
Gaussian operations on bosonic systems have a strict cooling bound, but non-Gaussian p-excitation exchange achieves p-fold better performance.
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Direct estimation of arbitrary observables of an oscillator
OREO is a numerically optimized protocol for direct estimation of arbitrary observables in quantum harmonic oscillators via mapping to an ancillary qubit in bosonic cQED.