Welcome to the Superfluid Optomechanics group
In the Superfluid Optomechanics group, we develop novel macroscopic quantum systems to explore the frontier between the quantum and the classical world. This research progresses, hands in hands, with the development of new quantum technology applications in precision sensing and information processing. Our devices demonstrate ultra-high sensitivity for quantum fluids sensing applications, and offer great prospects for long storage quantum memories.
Superfluid Optomechanics aims to study quantum decoherence in macroscopic quantum systems. This type of study will help enhance the knowledge base underpinning quantum technologies development, which is anticipated to generate important societal and economic impact.
Project: Superfluid Optomechanics with Nanofluidic Geometries
Quantum theory predictions, often counter-intuitive, have been mostly observed in atomic-scale systems (e.g. atoms, molecules). Thanks to recent progress, it is now possible to engineer quantum systems which show quantum features at the macroscopic scale. In our group, we couple light to mechanical resonators to study macroscopic mechanical motion at the quantum limit of precision.
Our mechanical systems are superfluid acoustic resonators confined into nanometer-scale cavities. These mechanical systems demonstrate unique features originating from the exotic properties of superfluid helium, the only natural quantum fluid. By coupling these mechanical systems to superconducting microwave cavities, we form quantum optomechanical systems. Our ultimate goal with this new class of optomechanical systems is to explore the frontier between the quantum and classical world.
|Dr Xavier Rojas||Royal Society URF, Principal Investigator|
|Mr Sebastian Spence||PhD Student|
|Mr Simon Perrett||Master Student|
Ms Chichi Qi (Undergraduate student - summer placement 2019)
Ms Zaynab Tahir (Euromaster student - year 2018-19)
Mr James Halson (Master student - summer placement 2018)
Mr Zhe Xian Koong (Master student - summer placement 2017)
- The AB transition in superfluid helium-3 under confinement in a thin slab geometry
N. Zhelev, T. S. Abhilash, E. N. Smith, R. G. Bennett, X. Rojas, L. Levitin, J. Saunders, and J. M. Parpia
Nature Communication 8, 15963 (2017)
- Ultralow-Dissipation Superfluid Micromechanical Resonator
F. Souris, X. Rojas, P. H. Kim, and J. P. Davis
Phys. Rev. Applied 7, 044008 (2017)
- Superfluid nanomechanical resonator for quantum nanofluidics
X. Rojas, J. P Davis
Physical Review B 91, 024503 (2015)
- Ultrasonic interferometer for first-sound measurements of confined liquid 4He
X. Rojas, B. D. Hauer, A. J. R. MacDonald, P. Saberi, Y. Yang, J. P. Davis
Physical Review B 89 (17), 174508 (2014)
Interested in joining our enthusiastic team of researchers working at the forefront of physics research? We often offer opportunities at the Undergraduate, Master, and PhD student level. Please contact us for more information.
We do not have funded postdoc positions at the moment. One may consider applying to other sources of funding for postdoctoral research opportunities:
- Newton International Fellowships (Royal Society)
Applications considered annually in Feb-March
- The Marie Curie Fellowships (European Commission)
Applications considered annually in September