Correlated and entangled quantum states generated by vacuum fields
Yuri V. Rostovtsev
Controllable sources of correlated photons are key enabling technologies for quantum communication, computation, and sensing. By providing precise control over photon correlations and phase at the single- and few-photon level, this work advances scalable quantum networks, secure communication protocols, and photonic quantum devices. Beyond information processing, correlated photons enable quantum-enhanced spectroscopy and imaging with unprecedented sensitivity under ultra-low-light conditions. The proposed research establishes a versatile platform at the intersection of atomic physics and quantum photonics, supporting emerging quantum technologies while training a highly skilled quantum workforce. We consider a Lambda-type three-level atom in a QED cavity. One atomic transition is driven by a classical field and the other transition is driven by the ”vacuum” field. The vacuum field can be strongly modified by the cavity, and in particular, the ”vacuum” field can have a chirped frequency modulation that it can be a part of adiabatic rapid passage together with classical drive field. The action of the classical and ”vacuum” or quantum field can result in the generation of the quantum fields with controllable parameters. Such QED cavity can be used to generate strongly correlated quantum fields that can be of interest for quantum sensing, spectroscopy at the single photon level, quantum teleportation, and other applications for quantum information.
Optical and Quantum Sensing and Precision Metrology II•Mar 5, 2026•1 citation