Matthew Mitchell
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View article: 1D Kinetic Energy Density Functionals learned with Symbolic Regression
1D Kinetic Energy Density Functionals learned with Symbolic Regression Open
Orbital-free density functional theory promises to deliver linear-scaling electronic structure calculations. This requires the knowledge of the non-interacting kinetic-energy density functional (KEDF), which should be accurate and must adm…
View article: Optical Switching of $χ^{(2)}$ in Diamond Photonics
Optical Switching of $χ^{(2)}$ in Diamond Photonics Open
Diamond's unique physical properties make it a versatile materials for a wide range of nonlinear and quantum photonic technologies. However, unlocking diamond's full potential as a nonlinear photonic material with non-zero second-order sus…
View article: Phonon excitations of Floquet-driven superfluids in a tilted optical lattice
Phonon excitations of Floquet-driven superfluids in a tilted optical lattice Open
Tilted lattice potentials with periodic driving play a crucial role in the study of artificial gauge fields and topological phases with ultracold quantum gases. However, driving-induced heating and the growth of phonon modes restrict their…
View article: Stability of superfluids in tilted optical lattices with periodic driving
Stability of superfluids in tilted optical lattices with periodic driving Open
Tilted lattice potentials with periodic driving play a crucial role in the study of artificial gauge fields and topological phases with ultracold quantum gases. However, driving-induced heating and the growth of phonon modes restrict their…
View article: Results on the Small Dispersion Limits of the Intermediate Long Wave and Benjamin-Ono Equations
Results on the Small Dispersion Limits of the Intermediate Long Wave and Benjamin-Ono Equations Open
The small dispersion limits of both the intermediate long wave and Benjamin-Ono equations are analyzed, albeit, in dramatically different contexts. While there is little rigorous theory regarding the solutions and scattering data of the in…
View article: Instabilities of interacting matter waves in optical lattices with Floquet driving
Instabilities of interacting matter waves in optical lattices with Floquet driving Open
We experimentally investigate the stability of a quantum gas with repulsive interactions in an optical one-dimensional lattice subjected to periodic driving. Excitations of the gas in the lowest lattice band are analyzed across the complet…
View article: Instabilities of interacting matter waves in optical lattices with Floquet driving
Instabilities of interacting matter waves in optical lattices with Floquet driving Open
We experimentally investigate the stability of a quantum gas with repulsive interactions in an optical 1D lattice subjected to periodic driving. Excitations of the gas in the lowest lattice band are analyzed across the complete stability d…
View article: Nonlinear optics in gallium phosphide cavities: simultaneous second and third harmonic generation
Nonlinear optics in gallium phosphide cavities: simultaneous second and third harmonic generation Open
We demonstrate the simultaneous generation of second and third harmonic signals from a telecom wavelength pump in a gallium phosphide (GaP) microdisk. Using analysis of the power scaling of both the second and third harmonic outputs and ca…
View article: Dynamics of periodically driven matter waves with negative effective mass
Dynamics of periodically driven matter waves with negative effective mass Open
We experimentally study the dynamics of a weakly interacting Bose-Einstein condensate of cesium atoms in a 1D optical lattice with a periodic driving force. The time evolution is analysed after a quench of the driving strength which leads …
View article: Collisionally Inhomogeneous Bose-Einstein Condensates with a Linear Interaction Gradient
Collisionally Inhomogeneous Bose-Einstein Condensates with a Linear Interaction Gradient Open
We study the evolution of a collisionally inhomogeneous matter wave in a spatial gradient of the interaction strength. Starting with a Bose-Einstein condensate with weak repulsive interactions in quasi-one-dimensional geometry, we monitor …
View article: Recording Meta-Soundscapes: Synchronized multi-frame audio field-recording at a large spatial scale
Recording Meta-Soundscapes: Synchronized multi-frame audio field-recording at a large spatial scale Open
As an investigation into alternatives to the predominant assumptions of conventional audio recording, the described research has sought to explore how field-recording of very large outdoor acoustic environments might be achieved. This was …
View article: Initial experience with the unrestricted introduction of sugammadex at a large academic medical center: a retrospective observational study examining postoperative mechanical ventilation and efficiency outcomes
Initial experience with the unrestricted introduction of sugammadex at a large academic medical center: a retrospective observational study examining postoperative mechanical ventilation and efficiency outcomes Open
rNMB was an important contributor to PACU MV utilization and its incidence significantly decreased after sugammadex introduction. The selected efficiency measures may not have been sufficiently granular to identify improvements following i…
View article: Real-time superchannel transmission over 10,500 km submarine link at 466 b/s/Hz spectral efficiency
Real-time superchannel transmission over 10,500 km submarine link at 466 b/s/Hz spectral efficiency Open
We show real-time measurement of error-free superchannel transmission over more than 10,500 km of large-area fiber at a spectral efficiency of 4.66 b/s/Hz, utilizing subcarrier based signal processing optimized at 5.4 GBd.
View article: Optomechanically\nInduced Transparency and Cooling\nin Thermally Stable Diamond Microcavities
Optomechanically\nInduced Transparency and Cooling\nin Thermally Stable Diamond Microcavities Open
Diamond cavity optomechanical\ndevices hold great promise for quantum\ntechnology based on coherent coupling between photons, phonons, and\nspins. These devices benefit from the exceptional physical properties\nof diamond, including its lo…
View article: Extended C-band tunable multi-channel InP-based coherent receiver PICs
Extended C-band tunable multi-channel InP-based coherent receiver PICs Open
Fully integrated monolithic, multi-channel InP-based coherent receiver PICs and transceiver modules with extended C-band tunability are described. These PICs operate at 33 and 44 Gbaud per channel under dual polarization (DP) 16-QAM modula…
View article: Integrated Devices for High-Performance Optical Links
Integrated Devices for High-Performance Optical Links Open
We present the development of large scale Photonic Integrated Circuits, high capacity optical module integration and their performance in a variety of data-center / metro and long-haul coherent optical link applications.