Villas-Boas Celso Jorge, Tolazzi Karl Nicolas, Wang Bo, Ianzano Christopher, Rempe Gerhard
Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, São Paulo, Brazil.
Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany.
Phys Rev Lett. 2020 Mar 6;124(9):093603. doi: 10.1103/PhysRevLett.124.093603.
We show an optical wave-mixing scheme that generates quantum light by means of a single three-level atom. The atom couples to an optical cavity and two laser fields that together drive a cycling current within the atom. Weak driving in combination with strong atom-cavity coupling induces transitions in a harmonic ladder of dark states, accompanied by single-photon emission via a quantum Zeno effect and suppression of atomic excitation via quantum interference. For strong driving, the system can generate coherent or Schrödinger cat-like fields with frequencies distinct from those of the applied lasers.
我们展示了一种光波混合方案，该方案通过单个三能级原子产生量子光。该原子与一个光学腔和两个激光场耦合，这两个激光场共同驱动原子内的循环电流。弱驱动与强原子-腔耦合相结合，会在暗态的谐波阶梯中引发跃迁，同时通过量子芝诺效应伴随单光子发射，并通过量子干涉抑制原子激发。对于强驱动，该系统可以产生频率与所施加激光不同的相干或类薛定谔猫态场。
