Eddy Collin

Quantitative calibration of a TWPA applied to an optomechanical platform

  1. Alexandre Delattre,
  2. Ilya Golokolenov,
  3. Richard Pedurand,
  4. Nicolas Roch,
  5. Arpit Ranadive,
  6. Martina Esposito,
  7. Luca Planat,
  8. Andrew Fefferman,
  9. Eddy Collin,
  10. Xin Zhou,
  11. Mika A. Sillanpaa,
  12. Laure Mercier de Lepinay,
  13. Andrew D. Armour,
  14. and Jonas Glatthard
In the last decade, the microwave quantum electronics toolbox has been enriched with quantum limited detection devices such as Traveling Wave Parametric Amplifiers (TWPAs). The extreme
sensitivity they provide is not only mandatory for some physics applications within quantum information processing, but is also the key element that will determine the detection limit of quantum sensing setups. In the framework of microwave optomechanical systems, an unprecedented range of small motions and forces is accessible, for which a specific quantitative calibration becomes necessary. We report on near quantum-limited measurements performed with an aluminum drumhead mechanical device within the temperature range 4 mK – 400 mK. The whole setup is carefully calibrated, especially taking into account the power-dependence of microwave absorption in the superconducting optomechanical cavity. This effect is commonly attributed to Two-Level-Systems (TLSs) present in the metal oxide. We demonstrate that a similar feature exists in the TWPA, and can be phenomenologically fit with adapted expressions. The power and temperature dependence is studied over the full parameter range, leading to an absolute definition of phonon population (i.e. Brownian motion amplitude), with an uncertainty +-20 %.
arxiv pdf

Microwave Optomechanically Induced Transparency and Absorption

  1. Sumit Kumar,
  2. Dylan Cattiaux,
  3. Eddy Collin,
  4. Andrew Fefferman,
  5. and Xin Zhou
High-quality microwave amplifiers and notch-filters can be made from microwave optomechanical systems in which a mechanical resonator is coupled to a microwave cavity by radiation pressure.
These amplifiers and filters rely on optomechanically induced transparency (OMIT) and absorption (OMIA), respectively. Such devices can amplify microwave signals with large, controllable gain, high dynamic range and very low noise. Furthermore, extremely narrowband filters can be constructed with this technique. We briefly review previous measurements of microwave OMIT and OMIA before reporting our own measurements of these phenomena, which cover a larger parameter space than has been explored in previous works. We find excellent agreement between our measurements and the predictions of input/output theory, thereby guiding further development of microwave devices based on nanomechanics.
arxiv pdf