BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Junior Quantum Seminar - Manel Bosch Aguilera (University of Basel
 )
DTSTART:20260217T103000
DTEND:20260217T120000
DTSTAMP:20260531T015438Z
UID:797ebb006a86a76c32f45338cc67df9cd9c50b4138734582e1f702ec
CATEGORIES:Conferences - Seminars
DESCRIPTION:Manel Bosch Aguilera\nPlease join us for the Junior Quantum 
 Seminar with Manel Bosch Aguilera from the Quantum Optics lab\, Departm
 ent of Physics\, University of Basel who will give the talk "When Quant
 um Noise Dominates Experiments: From Certification to Control" on Tuesday
  February 17th from 10h30-12h.\n\nPLEASE NOTE: The Junior Quantum Series a
 re for gathering  the junior quantum community of master's students\, 
 PhDs and post-docs at EPFL\, to create a non-judgmental space were scienti
 fic ideas can be shared between peers. This event is not for Professors or
  senior researchers. \n\nABTRACT: \nWhat does it mean for a light–matt
 er system to operate at the quantum limit?\nRather than referring to minim
 al noise or ultimate sensitivity\, one can adopt an operational definition
  in which a system is quantum-noise limited when its dynamics are dominate
 d by quantum backaction\, as opposed to thermal or technical noise. This c
 ondition is quantified by a quantum cooperativity Cq > 1. In this regime\,
  quantum fluctuations of light become the primary source of noise\, and th
 eir presence can be directly certified through correlations in the output 
 field.\nIn the first part of this talk\, I will discuss and show how this 
 notion of operating at the quantum limit arises in light–mechanical inte
 rfaces\, where vacuum fluctuations of the optical field dominate the dynam
 ics of a nanomechanical membrane and lead to observable signatures such as
  ponderomotive squeezing of light. Once quantum noise becomes the dominant
  factor\, a natural question follows: can this intrinsically quantum objec
 t—the noise itself—be processed and controlled in a useful way?\nIn th
 e second part\, I will show how a technique known as coherent feedback pro
 vides a route to reshaping quantum noise without measurement. By avoiding 
 measurement and processing the optical field within a coherent feedback lo
 op\, this approach preserves quantum correlations and allows them to inter
 fere coherently\, thereby engineering an effective reservoir with tunable 
 noise correlations. I will present experimental results demonstrating dyna
 mical control of a mechanical oscillator and cooling beyond the standard l
 imits of cavity dynamical backaction in the unresolved-sideband regime.\n\
 nBIO: \nManel Bosch Aguilera studied Physics at the University of Barcel
 ona and obtained his PhD at Laboratoire Kastler Brossel in Paris\, where h
 e worked on ultracold atom experiments investigating dissipation and coher
 ence in many-body quantum systems in optical lattices. He is currently a p
 ostdoctoral researcher at the University of Basel\, where his research foc
 uses on coherent feedback and the integration of optomechanics with cold a
 tom systems.\n 
LOCATION:CM 0 11 https://plan.epfl.ch/?room==CM%200%2011
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR