Tomás Ramos: New Spectroscopic Methods in Quantum Photonics: Accessing Multiphoton Processes and Correlated Noise

24.01.2018, 11:00

Speaker: Tomás Ramos (PhD), Spanish Research Council (CSIC), Madrid, Spain
Date and place: 24.01.2018, 11:00, MPL Seminarroom 1st floor
Host: Sandoghdar Division

Title: New Spectroscopic Methods in Quantum Photonics: Accessing Multiphoton Processes and Correlated Noise

Abstract: We present new methods for characterizing multiphoton scattering processes and correlated dephasing noise in experiments with propagating photons. First, we provide a spectroscopic protocol to characterize the photon-photon interactions mediated by any photonic quantum device such as a single molecule in free space or in a waveguide [1]. The protocol relies on coherent state inputs and homodyne detection at the output and provides simultaneous information about multiple --elastic and inelastic-- segments of the scattering matrix. Finally, we show how correlated dephasing noise is manifested in the line shapes of quantum emitters and how the same information contained in standard time-resolved Ramsey experiments can be extracted spectroscopically.


References:

[1] Multiphoton Scattering Tomography with Coherent States, T. Ramos, and J.J. García-Ripoll, Phys. Rev. Lett. 119, 153601 (2017).