Quantum-circuit guide to optical and atomic interferometry
arXiv:0909.0803 · doi:10.1016/j.optcom.2009.10.065
Abstract
Atomic (qubit) and optical or microwave (modal) phase-estimation protocols are placed on the same footing in terms of quantum-circuit diagrams. Circuit equivalences are used to demonstrate the equivalence of protocols that achieve the Heisenberg limit by employing entangled superpositions of Fock states, such as N00N states. The key equivalences are those that disentangle a circuit so that phase information is written exclusively on a mode or modes or on a qubit. The Fock-state-superposition phase-estimation circuits are converted to use entangled coherent-state superpositions; the resulting protocols are more amenable to realization in the lab, particularly in a qubit/cavity setting at microwave frequencies.
To appear in Optics Communications special issue in memory of Krzysztof Wodkiewicz
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- Fundamental quantum limits to waveform detection
- Entangled and sequential quantum protocols with dephasing
- Family of CV states of definite parity and their metrological power
- Trapped-ion Fock state preparation by potential deformation
- The probe readout and quantum limited measurements
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- Dynamical Maps for Accelerating Detectors