Publications (44)
Inverse design of light-matter interactions
Robert Bennett, Stefan Yoshi Buhmann
Inverse design represents a paradigm shift in the development of nanophotonic devices, where optimal geometries and materials are discovered by an algorithm rather than symmetry co…
Lateral interatomic dispersion forces
Pablo Barcellona, Robert Bennett, Stefan Yoshi Buhmann
Van der Waals forces between atoms and molecules are universally assumed to act along the line separating them. Inspired by recent works on effects which can propel atoms parallel…
Application of interactive parallel visualization for commodity-based clusters using visualization APIs
Stanimire Tomov, Robert Bennett, Michael McGuigan +3
We present an efficient and inexpensive to develop application for interactive high-performance parallel visualization. We extend popular APIs such as Open Inventor and VTK to supp…
Theory of quantum-vacuum detection
Frieder Lindel, Robert Bennett, Stefan Yoshi Buhmann
Recent progress in electro-optic sampling has allowed direct access to the fluctuations of the electromagnetic ground state. Here, we present a theoretical formalism that allows fo…
Angular momentum redirection phase of vector beams in a non-planar geometry
Amy McWilliam, Claire Marie Cisowski, Robert Bennett +1
An electric field propagating along a non-planar path can acquire geometric phases. Previously, geometric phases have been linked to spin redirection and independently to spatial m…
Direct measurement of short-range forces with a levitated nanoparticle
George Winstone, Markus Rademacher, Robert Bennett +2
Short-range forces have important real-world relevance across a range of settings in the nano world, from colloids and possibly for protein folding to nano-mechanical devices, but…
Measurement of the generalized form factors near threshold via $γ^* p \to nÏ^+$ at high
Kijun Park, Ralf Gothe, Krishna Adhikari +144
We report the first extraction of the pion-nucleon multipoles near the production threshold for the channel at relatively high momentum transfer ( up to 4.2 $\rm{GeV^2…
Environment-modified three-body energy transfer
Madeline C. Waller, Robert Bennett
Resonant energy transfer from a donor to an acceptor is one of the most basic interactions between atomic and molecular systems. In real-life situations, the donor and acceptor are…
Manipulating the Coulomb interaction: A Green's function perspective
Pablo Barcellona, Robert Bennett, Stefan Yoshi Buhmann
We present a unified framework for studying Coulomb interactions in arbitrary environments using macroscopic quantum electrodynamics on the basis of the electromagnetic Green's fun…
The Casimir-Polder potential in the presence of a Fock state
Theodor Haug, Robert Bennett, Stefan Yoshi Buhmann
Atom-surface forces using excited states have a host of compelling applications, including repulsive and lateral forces. However, such states can be fragile and difficult to prepar…
The Casimir effect for fields with arbitrary spin
Adam Stokes, Robert Bennett
The Casimir force between two perfectly reflecting parallel plates is considered. In a recent paper we presented generalised physical boundary conditions describing perfectly refle…
Inverse design of arbitrary optical helicity patterns
Romuald Kilianski, Robert Bennett
Superposing multiple plane waves can generate helicity lattices in which the optical helicity varies regularly in space. Here we propose an inverse design method for constructing a…
Revealing short-range non-Newtonian gravity through Casimir-Polder shielding
Robert Bennett, D. H. J. O'Dell
We carry out a realistic, yet simple, calculation of the Casimir-Polder interaction in the presence of a metallic shield in order to aid the design of experiments to test non-Newto…
Spectroscopic signatures of quantum friction
Juliane Klatt, Robert Bennett, Stefan Yoshi Buhmann
We present a formula for the spectroscopically accessible level shifts and decay rates of an atom moving at an arbitrary angle relative to a surface. Our Markov formulation leads t…
A generalized bag-like boundary condition for fields with arbitrary spin
Adam Stokes, Robert Bennett
Boundary conditions for the Maxwell and Dirac fields at material surfaces are widely-used and physically well-motivated, but do not appear to have been generalised to deal with hig…
Algorithmic Discovery of Casimir-Polder forces: Repulsion in the Ground State
Romuald Kilianski, Claire M. Cisowski, Robert Bennett
We present a general-purpose algorithm for automatic production of a structure that induces a desired Casimir-Polder force. As a demonstration of the capability and wide applicabil…
Casimir-Polder Potential of a Driven Atom
Sebastian Fuchs, Robert Bennett, Stefan Yoshi Buhmann
We investigate theoretically the Casimir-Polder potential of an atom which is driven by a laser field close to a surface. This problem is addressed in the framework of macroscopic…
A master equation for a two-sided optical cavity
Thomas M. Barlow, Robert Bennett, Almut Beige
Quantum optical systems, like trapped ions, are routinely described by master equations. The purpose of this paper is to introduce a master equation for two-sided optical cavities…
Atoms near a conducting wedge: decay rates and entanglement around a corner
Romuald Kilianski, Robert Bennett
The behavior of an atomic system is influenced by introducing a metallic surface. This work explores how the decay landscape can be altered by the presence of sharp corners. We exa…
Study of superfluid He under nanoscale confinement. A new approach to the investigation of superfluid He films
Lev Levitin, Robert Bennett, Andrew Casey +7
We review recent experiments in which superfluid He has been studied under highly controlled confinement in nanofluidic sample chambers. We discuss the experimental challenges…
Shape optimizations for body-assisted light-matter interactions
Jonas Matuszak, Stefan Yoshi Buhmann, Robert Bennett
We implement a shape optimization algorithm for body-assisted light-matter interactions described by the formalism of macroscopic quantum electrodynamics. The approach uses the lev…
A physically-motivated quantisation of the electromagnetic field
Robert Bennett, Thomas M. Barlow, Almut Beige
The notion that the electromagnetic field is quantised is usually inferred from observations such as the photoelectric effect and the black-body spectrum. However accounts of the q…
Rotational properties of two interacting cold polar molecules: linear, symmetric, and asymmetric tops
Felipe Isaule, Robert Bennett, Jörg B. Götte
We examine the potential-energy curves and polarization of the dipole moments of two static polar molecules under the influence of an external dc electric field and their anisotrop…
Spontaneous decay rate and Casimir-Polder potential of an atom near a lithographed surface
Robert Bennett
Radiative corrections to an atom are calculated near a half-space that has arbitrarily-shaped small depositions upon its surface. The method is based on calculation of the classica…
Superradiance and symmetry in resonant energy transfer
Severin Bang, Stefan Yoshi Buhmann, Robert Bennett
Closely-spaced quantum emitters coherently sharing excitation can release their energy faster than suggested by a simple sum over their individual emission rates - a phenomenon kno…
Distinguishing models of surface response through the self-energy of an electron
Robert Bennett, Stefan Yoshi Buhmann, Claudia Eberlein
The self-energy of an electron confined between parallel surfaces with arbitrary dielectric properties is calculated. The mechanism for this effect is the surface-induced modificat…
Born-series approach to the calculation of Casimir forces
Robert Bennett
The Casimir force between two objects is notoriously difficult to calculate in anything other than parallel-plate geometries due to its non-additive nature. This means that for mor…
Inverse design of environment-induced coherence
Robert Bennett
Atomic transitions with orthogonal dipole moments can be made to interfere with each other by the use of an anisotropic environment. Here we describe, provide and apply a computati…
Symmetry-breaking in a condensate of light and its use as a quantum sensor
Robert Bennett, Yaroslav Gorbachev, Stefan Yoshi Buhmann
Bose-Einstein condensates (BECs) represent one of the very few manifestations of purely quantum effects on a macroscopic level. The vast majority of BECs achieved in the lab to dat…
Non-additivity of optical and Casimir-Polder potentials
Sebastian Fuchs, Robert Bennett, Roman V. Krems +1
An atom irradiated by an off-resonant laser field near a surface is expected to experience the sum of two fundamental potentials, the optical potential of the laser field and the C…
Designer quantum reflection from a micropore
Romuald Kilianski, Robert Bennett
We expand the theoretical toolbox for controllable quantum reflection by departing from a simple planar reflector. We introduce a circular hole (a micropore) of variable size, for…
Spectroscopic Effects of Velocity-Dependent Casimir-Polder Interactions Induced by Parallel Plates
Joseph Durnin, Juliane Klatt, Robert Bennett +1
Casimir-Polder interactions cause energy and momentum exchange between microscopic and macroscopic bodies, a process mediated by quantum fluctuations in the coupled matter-electrom…
The virtual photon approximation for three-body interatomic Coulombic decay
Robert Bennett, Petra Votavová, PÅemysl KolorenÄ +3
Interatomic Coulombic decay (ICD) is a mechanism which allows microscopic objects to rapidly exchange energy. When the two objects are distant, the energy transfer between the dono…
Casimir effect for perfect electromagnetic conductors (PEMCs): A sum rule for attractive/repulsive forces
Stefan Rode, Robert Bennett, Stefan Yoshi Buhmann
We discuss the Casimir effect for boundary conditions involving perfect electromagnetic conductors (PEMCs). Based on the corresponding reciprocal Green's tensor we construct the Gr…
Quantum electrodynamics of a free particle near dispersive dielectric or conducting boundaries
Robert Bennett, Claudia Eberlein
Quantum electrodynamics near a boundary is investigated by considering the inertial mass shift of an electron near a dielectric or conducting surface. We show that in all tractable…
Towards nanophotonic optical isolation via inverse design of energy transfer in non-reciprocal media
Claire M. Cisowski, Madeline C. Waller, Robert Bennett
In this work we generalise the adjoint method of inverse design to nonreciprocal media. As a test case, we use three-dimensional topology optimization via the level-set method to o…
Magnetic moment of an electron near a surface with dispersion
Robert Bennett, Claudia Eberlein
Boundary-dependent radiative corrections that modify the magnetic moment of an electron near a dielectric or conducting surface are investigated. Normal-mode quantization of the el…
Cavity-QED interactions of two correlated atoms
Saeideh Esfandiarpour, Robert Bennett, Hassan Safari +1
We consider the resonant van der Waals interaction between two correlated identical two-level atoms (at least one of which being excited) within the framework of macroscopic cavity…
Zeeman shift of an electron trapped near a surface
Robert Bennett, Claudia Eberlein
Boundary dependent corrections to the spin energy eigenvalues of an electron in a weak magnetic field and confined by a harmonic trapping potential are investigated. The electromag…
Probing the Purcell effect without radiative decay: Lessons in the frequency and time domains
Frieder Lindel, Francesca Fabiana Settembrini, Robert Bennett +1
The microscopic processes underlying electro-optic sampling of quantum-vacuum fluctuations are discussed, leading to the interpretation of these experiments in terms of an exchange…
Impact of Casimir-Polder interaction on Poisson-spot diffraction at a dielectric sphere
Joshua Leo Hemmerich, Robert Bennett, Thomas Reisinger +5
Diffraction of matter-waves is an important demonstration of the fact that objects in nature possess a mixture of particle-like and wave-like properties. Unlike in the case of ligh…
Quantum phases of bosonic chiral molecules in helicity lattices
Felipe Isaule, Robert Bennett, Jörg B. Götte
We reveal the existence of polarizing quantum phases for the enantiomers of cold, interacting chiral molecules in an optical helicity lattice by means of an extended Bose-Hubbard m…
Anomalous magnetic moment of an electron near a dispersive surface
Robert Bennett, Claudia Eberlein
Changes in the magnetic moment of an electron near a dielectric or conducting surface due to boundary-dependent radiative corrections are investigated. The electromagnetic field is…
Engineering dipole-dipole couplings for enhanced cooperative light-matter interactions
Adam Burgess, Madeline C. Waller, Erik M. Gauger +1
Cooperative optical effects are enabled and controlled by interactions between molecular dipoles, meaning that their mutual orientation is of paramount importance to, for example,…