Continuous quantum light from a dark atom
- URL: http://arxiv.org/abs/2103.01138v2
- Date: Thu, 4 Mar 2021 10:49:11 GMT
- Title: Continuous quantum light from a dark atom
- Authors: Karl Nicolas Tolazzi, Bo Wang, Christopher Ianzano, Jonas Neumeier,
Celso Jorge Villas-Boas, Gerhard Rempe
- Abstract summary: We report on a quantum-nonlinear wave-mixing experiment where resonant lasers and an optical cavity define a closed cycle between several ground and excited states of a single atom.
We show that, for strong atom-cavity coupling and steady-state driving, the entanglement between the atomic states and intracavity photon number suppresses the excited-state population via quantum interference.
The system dynamics then result from transitions within a harmonic ladder of entangled dark states, one for each cavity photon number, and a quantum Zeno blockade that generates antibunching in the photons emitted from the cavity.
- Score: 2.5015682396550543
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Cycling processes are important in many areas of physics ranging from lasers
to topological insulators, often offering surprising insights into dynamical
and structural aspects of the respective system. Here we report on a
quantum-nonlinear wave-mixing experiment where resonant lasers and an optical
cavity define a closed cycle between several ground and excited states of a
single atom. We show that, for strong atom-cavity coupling and steady-state
driving, the entanglement between the atomic states and intracavity photon
number suppresses the excited-state population via quantum interference,
effectively reducing the cycle to the atomic ground states. The system dynamics
then result from transitions within a harmonic ladder of entangled dark states,
one for each cavity photon number, and a quantum Zeno blockade that generates
antibunching in the photons emitted from the cavity. The reduced cycle
suppresses unwanted optical pumping into atomic states outside the cycle,
thereby enhancing the number of emitted photons.
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