In our latest article, Lars Madsen, Catxere Casacio, Alex Terrasson, Warwick Bowen and collaborators measure the viscosity of a fluid within twenty microseconds and extreme precision—up to the point where the remnant uncertainty stems from its thermal molecular collisions. Read on in Nature Photonics!
Making mechanical qubits
Yasmine Sfendla, Chris Baker, Glen Harris, Ray Harrison, Warwick Bowen and collaborating professor Lin Tian from UC Merced have set a step towards developing the elusive all-mechanical qubit. All you need is some superfluid and a slab of silicon! Get the recipe at npj Quantum Information.
On-chip frequency tuning of laser light
Christian Bekker, Christopher Baker and Warwick Bowen are kicking us off for 2021 with their demonstration of broad wavelength tuning of photoluminescence on a silicon chip. Get on our wavelength at Physical Review Applied.
How vortex clusters expand
Call us spin doctors if you must, but we’re here with more vortex news to wrap your head around: Warwick Bowen and colleagues studied how vortices in a superfluid spread out over time from an initial arrangement. They found that each and every initial configuration results in a top-hat shaped velocity-position profile. Hat tip to our friends and colleagues at FLEET!
Mechanical squeezing
Just out: Chao Meng, George Brawley, James Bennett, Michael Vanner and Warwick Bowen predict that quantum squeezing could be achieved outside of the backaction-dominated, and quantum-coherent, oscillation regimes.
Quantum waves travel in a slot-waveguide
In our latest publication, Glen Harris, Andreas Sawadsky, Yasmine Sfendla, Walter Wasserman, Warwick Bowen and Chris Baker suggest filling a slot waveguide with superfluid to create an ultralow-dissipation resonator for travelling acoustic and optical waves. If you are familiar with our work, that suggestion should not come as a surprise. What can we say? A layer of superfluid does make everything better. Superfluid, some might say, is the mayonnaise of quantum optics.
A very small, not very cold, magnetosensor
Any scientist knows the importance of taking data with a grain of salt. Here at the QO Lab, Beibei Li, George Brawley, Hamish Greenall, Stefan Forstner and Warwick Bowen went a step further and developed a sensitive on-chip room-temperature magnetometer by embedding a grain of magnetorestrictive material in an optical cavity. Read on in Photonics Research.
Our sounds of science
At the 2017 Frontiers of Quantum and Mesoscopic Thermodynamics conference, participating physicists were asked to reflect on the greatest challenges facing the scientific community at this time. Out of the answers (slightly biased towards quantum and mesoscopic thermodynamics, perhaps) came this eclectic article. In the seventh chapter, Warwick Bowen, Nico Mauranyapin and Lars Madsen shed some squeezed light on motor molecules.
2020 Barry Inglis Medal for Warwick Bowen
Our group leader Warwick Bowen received the 2020 Barry Inglis Medal for the development of quantum technologies that benefit measurement science. A tremendous honor!
Growing crystals better
At the QO lab, we believe growth is fundamental to science. Especially when it concerns crystals on silicon. In our new paper Erick Romero, Atieh Kermany, Leo Sementilli, Warwick Bowen & collaborators carve out a method to quantify and engineer the dissipation of thin crystalline mechanical resonators. (F)etch a defect-free version at Phys. Rev. Applied!