228 citations · 987 across the 18 of their papers we have counts for
18 papers
Super-molasses returns: All optical near-resonance laser cooling and trapping of neutral atoms from background vapor
Matt Himsworth, Chester Camm, Max Carey +12
Laser cooled and trapped atoms have been the workhorse of atomic physics for the past four decades. The predominant method has been the highly versatile Magneto-Optical Trap. We de…
Spectral analysis and parameter estimation in levitated optomechanics
Chris Dawson, James Bateman
Optical levitation of nanoscale particles has emerged as a platform for precision measurement. Extremely low damping, together with optical interferometric position detection, make…
Matterwave interferometric velocimetry of cold Rb atoms
Max Carey, Mohammad Belal, Matthew Himsworth +2
We consider the matterwave interferometric measurement of atomic velocities, which forms a building block for all matterwave inertial measurements. A theoretical analysis, addressi…
A dynamic magneto-optical trap for atom chips
Jo Rushton, Ritayan Roy, James Bateman +1
We describe a dynamic magneto-optical trap (MOT) suitable for the use with vacuum systems in which optical access is limited to a single window. This technique facilitates the long…
Experimental Realisation of a Thermal Squeezed State of Levitated Optomechanics
Muddassar Rashid, Tommaso Tufarelli, James Bateman +4
We experimentally squeeze the thermal motional state of an optically levitated nanosphere, by fast switching between two trapping frequencies. The measured phase space distribution…
Parametric Feedback Cooling of Levitated Optomechanics in a Parabolic Mirror Trap
Jamie Vovrosh, Muddassar Rashid, David Hempston +3
We demonstrate a simple and robust geometry for optical trapping in vacuum of a single nanoparticle based on a parabolic mirror and the optical gradient force, and we demonstrate r…
Free Nano-Object Ramsey Interferometry for Large Quantum Superpositions
C. Wan, M. Scala, G. W. Morley +6
We propose an interferometric scheme based on an untrapped nano-object subjected to gravity. The motion of the center of mass (c.m.) of the free object is coupled to its internal s…
Optomechanical test of the Schrödinger-Newton equation
André Großardt, James Bateman, Hendrik Ulbricht +1
The Schrödinger-Newton equation has been proposed as an experimentally testable alternative to quantum gravity, accessible at low energies. It contains self-gravitational terms, wh…
Effects of Newtonian gravitational self-interaction in harmonically trapped quantum systems
André Großardt, James Bateman, Hendrik Ulbricht +1
The Schrödinger-Newton equation has gained attention in the recent past as a nonlinear modification of the Schrödinger equation due to a gravitational self-interaction. Such a modi…
Macroscopic quantum resonators (MAQRO): 2015 Update
Rainer Kaltenbaek, Markus Arndt, Markus Aspelmeyer +49
Do the laws of quantum physics still hold for macroscopic objects - this is at the heart of Schrödinger's cat paradox - or do gravitation or yet unknown effects set a limit for mas…
Interferometric laser cooling of atomic rubidium
Alexander Dunning, Rachel Gregory, James Bateman +2
We report the 1-D cooling of Rb atoms using a velocity-dependent optical force based upon Ramsey matter-wave interferometry. Using stimulated Raman transitions between groun…
Composite pulses for interferometry in a thermal cold atom cloud
Alexander Dunning, Rachel Gregory, James Bateman +4
Atom interferometric sensors and quantum information processors must maintain coherence while the evolving quantum wavefunction is split, transformed and recombined, but suffer fro…
On the Existence of Low-Mass Dark Matter and its Direct Detection
James Bateman, Ian McHardy, Alexander Merle +2
Dark Matter (DM) is an elusive form of matter which has been postulated to explain astronomical observations through its gravitational effects on stars and galaxies, gravitational…
Near-field interferometry of a free-falling nanoparticle from a point-like source
James Bateman, Stefan Nimmrichter, Klaus Hornberger +1
Matter-wave interferometry performed with massive objects elucidates their wave nature and thus tests the quantum superposition principle at large scales. Whereas standard quantum…
Stabilized fiber-optic Mach-Zehnder interferometer for carrier-frequency rejection
Nathan Cooper, Jonathan Woods, James Bateman +2
We have demonstrated stabilization of a fiber-optic Mach-Zehnder interferometer, with a centimeter-scale path difference, to the transmission minimum for the carrier wave of a freq…
Hänsch--Couillaud locking of Mach--Zehnder interferometer for carrier removal from a phase-modulated optical spectrum
J. E. Bateman, R. L. D. Murray, M. Himsworth +3
We describe and analyse the operation and stabilization of a Mach--Zehnder interferometer, which separates the carrier and the first-order sidebands of a phase-modulated laser fiel…
Stimulated Raman transitions via multiple atomic levels
James Bateman, André Xuereb, Tim Freegarde
We consider the stimulated Raman transition between two long-lived states via multiple intermediate states, such as between hyperfine ground states in the alkali-metal atoms. We pr…
Mirror-mediated cooling: a paradigm for particle cooling via the retarded dipole force
Tim Freegarde, James Bateman, André Xuereb +1
Cooling forces result from the retarded dipole interaction between an illuminated particle and its reflection. For a one-dimensional example, we find cooling times of milliseconds…