Control of the Purcell effect via unexcited atoms and exceptional points
arXiv:2311.10884 · doi:10.1103/PhysRevResearch.6.L012050
Abstract
We examine the possible control of the celebrated Purcell effect in cavity quantum electrodynamics. We demonstrate that the presence of an unexcited atom can significantly alter the Purcell decay depending on the strength of coupling of the unexcited atom with the cavity mode though the excited atom has to be weakly coupled for it to be in the Purcell regime. This is distinct from the nonradiative nature of the singlet state which is an entangled state of the two atom system. We present physical interpretation for inhibition as due to interference between two polariton channels of decay. We bring out connection to exceptional points in the cavity QED system as the unexcited atom and cavity mode can produce a second order exceptional point. We further show how two unexcited atoms can create a third order exceptional point leading to inhibition of Purcell effect. We also discuss the case when the Purcell effect can be enhanced.
References in corpus (17)
- Topological Transitions in Metamaterials
- Detecting single viruses and nanoparticles using whispering gallery microlasers
- Non-Hermitian Quantum Sensing: Fundamental Limits and Non-Reciprocal Approaches
- Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
- Decoherence-free interaction between giant atoms in waveguide QED
- Observation of Dicke Superradiance for Two Artificial Atoms in a Cavity with High Decay Rate
- Single Photon Subradiance: Quantum control of spontaneous emission and ultrafast readout
- Sensitivity of parameter estimation near the exceptional point of a non-Hermitian system
- Inhibited spontaneous emission of quantum dots observed in a 3D photonic band gap
- Spontaneous Generation of Photons in Transmission of Quantum Fields in PT Symmetric Optical Systems
- Observation of Exceptional Points in Thermal Atomic Ensembles
- Realization of strong coupling between deterministic single-atom arrays and a high-finesse miniature optical cavity
- Strong Purcell effect on a neutral atom trapped in an open fiber cavity
- Speeding up entanglement generation by proximity to higher-order exceptional points
- Observation of large spontaneous emission rate enhancement of quantum dots in a broken-symmetry slow-light waveguide
- Photonic crystals and inhibition of spontaneous emission: an introduction
- Exceptional points treatment of cavity spectroscopies