A5015151580- Mechanical and Optical Resonators
- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Dark Matter and Cosmic Phenomena
- Quantum Electrodynamics and Casimir Effect
- Atomic and Subatomic Physics Research
- Spectroscopy and Quantum Chemical Studies
- Microfluidic and Bio-sensing Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Particle Dynamics in Fluid Flows
- Force Microscopy Techniques and Applications
- Coagulation and Flocculation Studies
- Photonic and Optical Devices
- Geophysics and Sensor Technology
- Advanced MEMS and NEMS Technologies
- Experimental and Theoretical Physics Studies
- Thermal Radiation and Cooling Technologies
- Particle Detector Development and Performance
- Electrohydrodynamics and Fluid Dynamics
- Analytical Chemistry and Chromatography
- Nanoparticles: synthesis and applications
- Orbital Angular Momentum in Optics
University College London
2019-2025
University of Glasgow
2022
Vienna Center for Quantum Science and Technology
2022
University of Vienna
2022
University of Southampton
2018
Advances in quantum technologies are giving rise to a revolution the way fundamental physics questions explored at empirical level. At same time, they seeds for future disruptive technological applications of physics. Remarkably, space-based environment may open many new avenues exploring and employing technologies. Recently, space missions or applied studies have been proposed implemented with stunning results. The combination its application is focus this review: we cover both scientific...
Following the first demonstration of a levitated nanosphere cooled to quantum ground state in 2020 [1], macroscopic sensors are seemingly on horizon. The nanosphere's large mass as compared other systems enhances susceptibility nanoparticle gravitational and inertial forces. In this viewpoint we describe features experiments with optically nanoparticles [2] their proposed utility for acceleration sensing. Unique platform is ability implement not only noise limited transduction, predicted by...
Fluctuation theorems are fundamental extensions of the second law thermodynamics for small nonequilibrium systems. While work and heat equally important forms energy exchange, fluctuation relations have not been experimentally assessed generic situation simultaneous mechanical thermal changes. Thermal driving is indeed generally slow more difficult to realize than driving. Here, we use feedback cooling techniques implement fast controlled temperature variations an underdamped levitated...
We report on optical levitation experiments to probe the interaction of a nanoparticle with surface in vacuum. The observed interaction-induced effect is controllable anharmonicity particle trapping potential. reconstruct Coulomb image charge potential be perfect agreement experimental data for carrying $Q=\ensuremath{-}(11\ifmmode\pm\else\textpm\fi{}1)e$ elementary charges and compare measured electrostatic weaker dispersive forces from theory. Our results may open route new sensitive...
Motivated by the current interest in employing quantum sensors on Earth and space to conduct searches for new physics, we provide a perspective suitability of large-mass levitated optomechanical systems observing dark matter signatures. We discuss conservative approaches recoil detection through spectral analysis coherently scattered light, enhancements directional effects due cross-correlation densities, possibility using superpositions mesoscopic test particles measure rare events.
We demonstrate the measurement of nanoparticle anisotropy by angularly resolved Rayleigh scattering single optical levitated particles that are oriented in space via trapping light vacuum. This technique is applied to a range particle geometries from perfect spherical nanodroplets octahedral nanocrystals. show this method can resolve shape differences down few nanometers and be both low-damping environments, as demonstrated here, traditional overdamped fluids used tweezers.
The traditional view from particle physics is that quantum gravity effects should only become detectable at extremely high energies and small length scales. Due to the significant technological challenges involved, there has been limited progress in identifying experimentally can be accessed foreseeable future. However, recent decades, size mass of systems controlled laboratory have reached unprecedented scales, enabled by advances ground-state cooling quantum-control techniques....
Motivated by the current interest in employing quantum sensors on Earth and space to conduct searches for new physics, we provide a perspective suitability of large-mass levitated optomechanical systems observing dark matter signatures. We discuss conservative approaches recoil detection through spectral analysis coherently scattered light, enhancements directional effects due cross-correlation densities, possibility using superpositions mesoscopic test particles measure rare events.
The optical centrifuge is an established tool in molecular physics for inducing controlled rotation of molecules through the transfer angular momentum from field. Here polarization vector rapidly rotated up to high velocities, which subsequently rotates frequencies. This technique has been instrumental studying structure and collision processes. Recently, there significant interest controlling rotational motion nanorotors study non-classical states these macroscopic systems. We describe...
Fast detection and characterization of single nanoparticles such as viruses, airborne aerosols colloidal particles are considered to be particularly important for medical applications, material science atmospheric physics. In particular, non-intrusive optical characterization, which can carried out in isolation from other particles, without the deleterious effects a substrate or solvent, is seen important. Optical via scattering light does not require complicated sample preparation principle...
We demonstrate the measurement of nanoparticle shape by angularly resolved Rayleigh scattering single optical levitated particles that are oriented in space via trapping light vacuum. This technique is applied to a range particle geometries, from perfect spherical nanodroplets octahedral nanocrystals. show this method can resolve differences down few nanometers and be both low-damping environments, as demonstrated here, traditional overdamped fluids used tweezers.