Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon.
We propose and demonstrate a versatile technique to measure the lifetime of the one-phonon Fock state using two-color pump-probe Raman scattering and spectrally-resolved, time-correlated photon counting. Following pulsed laser excitation, the $n=1$ phonon Fock state is prepared probabilistically by projective measurement of a single Stokes photon. The detection of an anti-Stokes photon generated by a second, time-delayed laser pulse probes the phonon population with sub-picosecond time resolution. We observe strongly non-classical Stokes--anti-Stokes correlations, whose decay maps the single phonon dynamics. Our scheme can be extended to any Raman-active vibration to measure the lifetime of $n \geq 1$ Fock states as well as the phonon quantum coherences through the detection of two-mode entangled vibrational states.
Publisher URL: http://arxiv.org/abs/1802.04163
DOI: arXiv:1802.04163v1
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