Publications de Santiago Tarrago Velez

Data and code associated with the paper 'Measurement-induced collective vibrational quantum coherence under spontaneous Raman scattering in a liquid'

Christophe Marcel Georges Galland, Valeria Vento, Santiago Tarrago Velez, Anna Pogrebna

Data and code associated with the following paper V. Vento, S. Tarrago-Velez et al., Nat. Commun. (2023) A thorough explanation of the experiment performed is available there. The name of each sub-folder and file in CS2_data_code.zip indic ...

Zenodo2023

Measurement-induced collective vibrational quantum coherence under spontaneous Raman scattering in a liquid

Christophe Marcel Georges Galland, Valeria Vento, Santiago Tarrago Velez, Anna Pogrebna

Spontaneous Raman scattering is classically understood as an incoherent process. Here, the authors demonstrate that macroscopic quantum coherence among billions of vibrating molecules in a liquid is generated when single photon detection and single spatio- ...

Nature Research2023

Assessment of the Bundle SNSPD Plus FPGA-Based TDC for High-Performance Time Measurements

Christophe Marcel Georges Galland, Andrea Costa, Santiago Tarrago Velez

Counting single photons and measuring their arrival time is of crucial importance for imaging and quantum applications that use single photons to outperform classical techniques. The investigation of the coincidence, i.e. correlation, between photons can b ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Non-classical photon-phonon correlations at room temperature

Santiago Tarrago Velez

With the development of quantum optics, photon correlations acquired a prominent role as a tool to test our understanding of physics, and played a key role in verifying the validity of quantum mechanics. The spatial and temporal correlations in a light fie ...

EPFL2021

Current Center Line Integration in the Manufacturing Process of the ITER Toroidal Field Coils

Santiago Tarrago Velez

The first ITER & x0027;s European Toroidal Field Coil (TFC) is going to be assembled in 2019. The TFC is composed mainly by the superconducting Winding Pack (WP - manufactured in Europe), and the Coil Cases (TFCC - manufactured in Japan), which provide str ...

IEEE Institute of Electrical and Electronics Engineers2020

Bell correlations between light and vibration at ambient conditions

Christophe Marcel Georges Galland, Santiago Tarrago Velez

Time-resolved Raman spectroscopy techniques offer various ways to study the dynamics of molecular vibrations in liquids or gases and optical phonons in crystals. While these techniques give access to the coherence time of the vibrational modes, they are no ...

AMER ASSOC ADVANCEMENT SCIENCE2020

Preparation and Decay of a Single Quantum of Vibration at Ambient Conditions

Christophe Marcel Georges Galland, Vivishek Sudhir, Mitchell David Anderson, Kilian Robert Seibold, Nils Kipfer, Santiago Tarrago Velez

A single quantum of excitation of a mechanical oscillator is a textbook example of the principles of quantum physics. But mechanical oscillators, despite their pervasive presence in nature and modem technology, do not genetically exist in an excited Fock s ...

American Physical Society2019

Two-Color Pump-Probe Measurement of Photonic Quantum Correlations Mediated by a Single Phonon

Vincenzo Savona, Christophe Marcel Georges Galland, Hugo Pierre Alexandre Flayac, Mitchell David Anderson, Kilian Robert Seibold, Santiago Tarrago Velez

We propose and demonstrate a versatile technique to measure the lifetime of the one-phonon Fock state using two-color pump-probe Raman scattering and spectrally resolved, time-correlated photon counting. Following pulsed laser excitation, the n = 1 phonon ...

2018

Nanoparticle on mirror plasmonic nanostructure for molecular cavity optomechanics

Christophe Marcel Georges Galland, Aqeel Ahmed, Nils Kipfer, Santiago Tarrago Velez, Tianqi Zhu

The plasmonic response of gold can be utilized to enhance the incident electromagnetic (EM) field by several orders of magnitude. When a gold nanoparticle is placed in close proximity to a gold film, the incident field can excite a deeply confined plasmon, ...

IEEE2018