6533b7cffe1ef96bd1259b45
RESEARCH PRODUCT
Quantum synchronization as a local signature of super- and subradiance
Gian Luca GiorgiBruno BellomoRoberta ZambriniG. M. Palmasubject
PhysicsQuantum PhysicsDephasingFOS: Physical sciencesquantum syncronizationopen quantum systemsDissipation01 natural sciencesAtomic and Molecular Physics and Optics010305 fluids & plasmas[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph]Quantum mechanicsReciprocity (electromagnetism)Qubit0103 physical sciencesDissipative system010306 general physicsGround stateQuantum Physics (quant-ph)superradianceQuantumComputingMilieux_MISCELLANEOUSCoherence (physics)description
We study the relationship between the collective phenomena of super- and subradiance and spontaneous synchronization of quantum systems. To this aim we revisit the case of two detuned qubits interacting through a pure dissipative bosonic environment, which contains the minimal ingredients for our analysis. By using the Liouville formalism, we are able to find analytically the ultimate connection between these phenomena. We find that dynamical synchronization is due to the presence of longstanding coherence between the ground state of the system and the subradiant state. We finally show that, under pure dissipation, the emergence of spontaneous synchronization and of subradiant emission occur on the same time scale. This reciprocity is broken in the presence of dephasing noise.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-04-01 | Physical Review A |