Quantum synchronization as a local signature of super and subradiance

• DOI: 10.1103/PhysRevA.95.043807
• ArXiv number: arXiv:1612.07134

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.

• Artículo completo

Related research projects

QuStruct

Quantum information preserving with structured embbedings

I.P.: Fernando Galve

Most efforts in the fabrication of platforms for quantum information tasks have been mostly directed towards the increase of the number of units under control, their addressability and the achievement of strong …

QuProCS

Quantum Probes for Complex Systems

I.P.: Roberta Zambrini

We are on the verge of a new scientific and technological era as the first quantum simulators able to investigate physical systems that cannot be studied classically are about to be built …

NOMAQ

Non-Markovian quantum evolutions in structured environments

I.P.: Roberta Zambrini

The field of quantum information has usually treated dissipation and decoherence as unwanted effects to be minimized for the successful completion of quantum information tasks. Recently the possibility to actually control and …