How can quantum aspects of nature be exploited in order to build better sensors or to acquire better information about any system we want to measure? Answering this question is the overall goal of this research line.
We are addressing this problem from two angles. The first one is the excitation of a system by quantum light, such as antibunched or strongly-correlated photons, which allows us to infer new details about the internal dynamics of quantum systems that would be hidden by using classical light. The second one is the analysis of quantum properties of the light emitted by a system, or in other words, the study of how the deviation from its classical behaviour can reveal information about the internal details of the source, e.g. the existence of coherent dynamics. These two routes can, of course, be combined in a joint approach in which in image is taken by analysing the quantum properties of the light emitted by a material which is itself driven by quantum light. I am also particularly interested in understanding how artificial intelligence can assist us in the task of retrieving information about a system from the quantum correlations of the light emitted by it, which is, after all, a data-analysis problem.
We are addressing this problem from two angles. The first one is the excitation of a system by quantum light, such as antibunched or strongly-correlated photons, which allows us to infer new details about the internal dynamics of quantum systems that would be hidden by using classical light. The second one is the analysis of quantum properties of the light emitted by a system, or in other words, the study of how the deviation from its classical behaviour can reveal information about the internal details of the source, e.g. the existence of coherent dynamics. These two routes can, of course, be combined in a joint approach in which in image is taken by analysing the quantum properties of the light emitted by a material which is itself driven by quantum light. I am also particularly interested in understanding how artificial intelligence can assist us in the task of retrieving information about a system from the quantum correlations of the light emitted by it, which is, after all, a data-analysis problem.
Relevant publications
- Photon correlation spectroscopy as a witness for quantum coherence
C. Sánchez Muñoz, F Schlawin
Physical Review Letters 124 (20), 203601 (2020) - First observation of the quantized exciton-polariton field and effect of interactions on a single polariton
A. Cuevas, B. Silva, J. C. López Carreño, M. de Giorgi, C. Sánchez Muñoz, A. Fieramosca, D. G.
Suárez Forero, F. Cardano, L. Marrucci, V. Tasco, G: Biasiol, E. del Valle, L. Dominici, D. Ballarini, G.
Gigli, P. Mataloni, F. P. Laussy, F. Sciarrino and D. Sanvitto.
Science Advances 4(4), eaao6814 (2018) - Exciting with Quantum Light. II. Exciting a two-level system
J. C. López Carreño, C. Sánchez Muñoz, E. del Valle and F. P. Laussy.
Phys. Rev. A 94, 063826 (2016) - The colored Hanbury Brown–Twiss effect.
B. Silva, C. Sánchez Muñoz, A. González Tudela, D. Ballarini, G. Gigli, K. W. West, L. Pfeiffer, E. del
Valle, D. Sanvitto, F. P. Laussy.
Sci. Rep. 6, 37980 (2016) - Exciting Polaritons with Quantum Light.
J. C. López Carreño, C. Sánchez Muñoz, D. Savitto, E. del Valle, F. P. Laussy.
Phys. Rev. Lett. 115, 196402 (2015) - Violation of classical inequalities by frequency filtering.
C. Sánchez Muñoz, E. del Valle, C. Tejedor, F. P. Laussy.
Phys. Rev. A 90, 052111 (2014)
Outreach
Here you can see an outreach video about the fantastic experiment performed by the group of Daniele Sanvitto in Lecce (publication 2 of the list above), where a single photon from an entangled photon pair was used to create a single polariton for the first time. The entanglement between the second photon from the original pair and the single photon emitted by the polariton was then measured to probe the internal dynamics of the system!