Browsing by Author "Carrasco, Sergio"

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Amplification of mechanical quadratures using weak values
    (2022) Carrasco, Sergio; Orszag, Miguel
    An interferometric arrangement is proposed in which the technique of weak value amplification is implemented in order to enlarge the effect of a single photon on the quadratures of a movable mirror of an optical cavity. The photon interacts weakly with the mirror via radiation pressure and is postselected in the dark port of the interferometer. The real and imaginary parts of weak values of angular momentum type photonic operators produce an amplification of the mirror quadratures, which is large as compared to the scenario in which all photons are taken into consideration, i.e. when no postselection is performed. The effect is studied both for a mirror initialized in a thermal and coherent states. For a thermal state, the weak value amplification effect is boosted with the number of particles of the mirror, which occurs due to the imaginary part of the weak values.
  • No Thumbnail Available
    Item
    Estimation of an optomechanical parameter via weak-value amplification
    (2022) Carrasco, Sergio; Orszag, Miguel
    In this article we present an experimental proposal for the estimation of an optomechanical parameter in the presence of noise. The estimation is based on the technique of weak-value amplification which can enlarge the radiation pressure effect of a single photon on a mechanical oscillator. In our setup we show that the weak value amplification technique is preferable for the estimation over a method that relies on a strong measurement with postselection because the first method does not require a good prior knowledge of the parameter we wish to estimate, while both strategies reach the same level of precision from a Fisher information perspective. In the presence of strongly correlated noise, the weak-value amplification method is preferable, from a Fisher information perspective, than a standard measurement strategy that does not employ postselection and that is affected by the same type of noise.
  • Thumbnail Image
    Item
    Initial assessment of coastal benthic communities in the marine parks at Robinson Crusoe Island
    (2014) Fernández, Miriam; Rodriguez-Ruiz, Montserrat; Andreu-Cazenave, Miguel; Ruano-Chamorro, Cristina; Ramirez, Fabian; González Gálvez, Catherine Michel; Carrasco, Sergio; Pérez Matus, Alejandro A.; Fernández, Miriam
  • Thumbnail Image
    Item