Quantum Optics & Nanophotonics

The interaction of light with quantum emitters is a paradigmatic yet complex phenomenon at the heart of most quantum technologies. On a broader scale, a description of quantum emitters interacting with quantum fields is key to understand and/or harness a wide range of phenomena, from the collective strong coupling regime to the behavior of closely-packed atomic lattices or the low-temperature decoherence of mechanical and microwave resonators.

We work on extending the current theoretical understanding of these systems. On the one hand, we aim at harnessing and controlling additional degrees of freedom, such as the mechanical motion of quantum emitters. On the other hand we also study alternative methods to enhance control and reduce losses in nanophotonic and magnonic structures, such as electromagnetic pulse engineering or driving of spin baths.

Latest publications in Quantum Optics & Nanophotonics

Non-Markovian Effects of Two-Level Systems in a Niobium Coaxial Resonator with a Single-photon Lifetime of 10 milliseconds
P. Heidler, C. M. F. Schneider, K. Kustura, C. Gonzalez-Ballestero, O. Romero-Isart, G. Kirchmair
Physical Review Applied 16, 034024 (2021)

Effective quantum dynamics induced by a driven two-level-system bath
K. Kustura, O. Romero-Isart, C. Gonzalez-Ballestero
Physical Review A 103, 053709 (2021)

Remote individual addressing of quantum emitters with chirped pulses
S. Casulleras, C. Gonzalez-Ballestero, P. Maurer, J. J. García-Ripoll, O. Romero-Isart
Physical Review Letters 126, 103602 (2021)

Theory of waveguide QED with moving emitters
E. Sánchez-Burillo, A. González-Tudela, C. Gonzalez-Ballestero
Physical Review A 102, 013726 (2020)