Related papers: Strong quantum correlations of light emitted by a single atom in free space

Strong quantum correlations of light emitted by a single atom in free space

URL: http://arxiv.org/abs/2004.01993v1
Date: Sat, 4 Apr 2020 18:43:43 GMT
Title: Strong quantum correlations of light emitted by a single atom in free space
Authors: Daniel Goncalves, Morgan W. Mitchell and Darrick E. Chang
Abstract summary: We present a novel approach to engineer the photon correlations emerging from the interference between an input field and the field scattered by a single atom in free space. We show that one can tune the correlation function $g(2)(tau)$ from zero (perfect anti-bunching) to infinite (extreme bunching) by a proper choice of pump amplitude.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We present a novel approach to engineer the photon correlations emerging from the interference between an input field and the field scattered by a single atom in free space. Nominally, the inefficient atom-light coupling causes the quantum correlations to be dominated by the input field alone. To overcome this issue, we propose the use of separate pump and probe beams, where the former increases the atomic emission to be comparable to the probe. Examining the second-order correlation function $g^{(2)}(\tau)$ of the total field in the probe direction, we find that the addition of the pump formally plays the same role as increasing the coupling efficiency. We show that one can tune the correlation function $g^{(2)}(0)$ from zero (perfect anti-bunching) to infinite (extreme bunching) by a proper choice of pump amplitude. We further elucidate the origin of these correlations in terms of the transient atomic state following the detection of a photon.

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