Publications (27)
Hydrodynamic effects on the energy transfer from dipoles to metal slab
Daniel Brown, Hai-Yao Deng
A systematic study of nonlocal and size effects on the energy transfer of a dipole (e.g. a molecule or a quantum dot) induced by the proximity of a metal slab is presented. Nonloca…
Squeezing the quantum noise of a gravitational-wave detector below the standard quantum limit
Wenxuan Jia, Victoria Xu, Kevin Kuns +168
Precision measurements of space and time, like those made by the detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO), are often confronted with fundamental…
Realistic polarizing Sagnac topology with DC readout for the Einstein Telescope
Mengyao Wang, Charlotte Bond, Daniel Brown +4
The Einstein Telescope (ET) is a proposed future gravitational wave detector. Its design is original, using a triangular orientation of three detectors and a xylophone configuratio…
Phase effects due to beam misalignment on diffraction gratings
Deepali Lodhia, Daniel Brown, Frank Brueckner +4
All-reflective interferometer configurations have been proposed for the next generation of gravitational wave detectors, with diffractive elements replacing transmissive optics. Ho…
A Graph Model for the quantum mechanics of a moving cyclic disturbance interacting at a spatial position
Daniel Brown
An analysis is made of a moving disturbance using a directed cyclic graph. A statistical approach is used to calculate the alternative positions in space and state of the disturban…
Squeezed state degradations due to mode mismatch and thermal aberrations in gravitational wave detectors
Kevin Kuns, Daniel Brown
To date, frequency-dependent squeezed light has been used to reduce quantum noise in interferometric gravitational wave detectors by 6.1 dB (a factor of two). Future upgrades and d…
Quantum-Kinetic Dark Energy (QKDE): An effective dark energy framework with a covariantly completed time-dependent scalar kinetic normalization
Daniel Brown
A minimal effective dark-energy framework - Quantum-Kinetic Dark Energy (QKDE) - is developed in which the scalar kinetic normalization carries a slow background time dependence th…
Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr
Eudomar HenrÃquez-Guerra, Alberto M. Ruiz, Marta Galbiati +17
Tailoring magnetoresistance and magnetic anisotropy in van der Waals magnetic materials is essential for advancing their integration into technological applications. In this regard…
Observing the optical modes of parametric instability
Mitchell Schiworski, Vladimir Bossilkov, Carl Blair +4
Parametric Instability (PI) is a phenomenon that results from resonant interactions between optical and acoustic modes of a laser cavity. This is problematic in gravitational wave…
Interferometer responses to gravitational waves: Comparing FINESSE simulations and analytical solutions
Charlotte Bond, Daniel Brown, Andreas Freise
A comparison of analytic calculations and FINESSE simulations of interferometer responses to gravitational wave strain. The response to a gravitational wave is gradually built up f…
Transient Structures and Stream Interaction Regions in the Solar Wind: Results from EISCAT Interplanetary Scintillation, STEREO HI and Venus Express ASPERA-4 Measurements
Gareth Dorrian, Andy Breen, Jackie Davies +7
We discuss the detection and evolution of a complex series of transient and quasi-static solar wind structures in the days following the well-known comet 2P / Encke tail disconnect…
O VI and H_2 Lines in Sunspots
Nicolas Labrosse, Huw Morgan, Shadia Rifai Habbal +1
Sunspots are locations on the Sun where unique atmospheric conditions prevail. In particular, the very low temperatures found above sunspots allow the emission of H_2 lines. In thi…
A Polarization-Decomposed Method for Simulating Inhomogeneous Birefringence in Laser-Interferometric Gravitational-Wave Detectors
Haoyu Wang, Yuta Michimura, Keiko Kokeyama +9
Birefringence in test mass substrates is an emerging limitation for current and future laser-interferometric gravitational-wave detectors, particularly as detectors move toward hig…
Continuous gravitational waves in the lab: recovering audio signals with a table-top optical microphone
James W. Gardner, Hannah Middleton, Changrong Liu +8
Gravitational-wave observatories around the world are searching for continuous waves: persistent signals from sources such as spinning neutron stars. These searches use sophisticat…
Measuring Human Assessed Complexity in Synthetic Aperture Sonar Imagery Using the Elo Rating System
Brian Reinhardt, Isaac Gerg, Daniel Brown +1
Performance of automatic target recognition from synthetic aperture sonar data is heavily dependent on the complexity of the beamformed imagery. Several mechanisms can contribute t…
You only thermoelastically deform once: Point Absorber Detection in LIGO Test Masses with YOLO
Simon R. Goode, Mitchell Schiworski, Daniel Brown +2
Current and future gravitational-wave observatories rely on large-scale, precision interferometers to detect the gravitational-wave signals. However, microscopic imperfections on t…
Angular control noise in Advanced Virgo and implications for the Einstein Telescope
Riccardo Maggiore, Paolo Ruggi, Andreas Freise +8
With significantly improved sensitivity, the Einstein Telescope (ET), along with other upcoming gravitational wave detectors, will mark the beginning of precision gravitational wav…
To see or not to see a Bow Shock: Identifying Bow Shocks with H-Alpha Allsky Surveys
Daniel Brown, Dominik J. Bomans
OB-stars have the highest luminosities and strongest stellar winds of all stars, which enables them to interact strongly with their surrounding ISM, thus creating bow shocks. These…
Fast Simulation of Gaussian-Mode Scattering for Precision Interferometry
Daniel Brown, Rory Smith, Andreas Freise
Understanding how laser light scatters from realistic mirror surfaces is crucial for the design, com- missioning and operation of precision interferometers, such as the current and…
Interferometer Techniques for Gravitational-Wave Detection
Charlotte Bond, Daniel Brown, Andreas Freise +1
Several km-scale gravitational-wave detectors have been constructed world wide. These instruments combine a number of advanced technologies to push the limits of precision length m…
ProbeMDE: Uncertainty-Guided Active Proprioception for Monocular Depth Estimation in Surgical Robotics
Britton Jordan, Jordan Thompson, Jesse F. d'Almeida +8
Monocular depth estimation (MDE) provides a useful tool for robotic perception, but its predictions are often uncertain and inaccurate in challenging environments such as surgical…
Invariance of waveguide grating mirrors to lateral displacement phase shifts
Daniel Brown, Daniel Friedrich, Frank Brückner +3
We present a method to analyse the coupling of lateral displacements in nanoscale structures, in particular waveguide grating mirrors (WGM), into the phase of a reflected Gaussian…
A Graph method for mapping changes in temporal and spatial phenomena with relativistic consequences
Daniel Brown
A cellular automata approach using a Directed Cyclic Graph is used to model interrelationships of fluctuating time, state and space. This model predicts phenomena including a const…
The Time Vector: An Analysis of Continuity and Change
Daniel Brown
This paper sets out to explain: 1. Why the speed of light c is a constant and is the maximum speed at which any moving entity can travel. 2. Why time elapsed is different for a mov…
Finesse, Frequency domain INterferomEter Simulation SoftwarE
Andreas Freise, Daniel Brown, Charlotte Bond
Finesse is a fast interferometer simulation program. For a given optical setup, it computes the light field amplitudes at every point in the interferometer assuming a steady state.…
Coupling Rendering and Generative Adversarial Networks for Artificial SAS Image Generation
Albert Reed, Isaac Gerg, John McKay +3
Acquisition of Synthetic Aperture Sonar (SAS) datasets is bottlenecked by the costly deployment of SAS imaging systems, and even when data acquisition is possible,the data is often…
Review of the Laguerre-Gauss mode technology research program at Birmingham
Paul Fulda, Charlotte Bond, Daniel Brown +7
Gravitational wave detectors from the advanced generation onwards are expected to be limited in sensitivity by thermal noise of the optics, making the reduction of this noise a key…