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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