A5003302457- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Quantum Information and Cryptography
- Mechanical and Optical Resonators
- Quantum optics and atomic interactions
- Semiconductor Lasers and Optical Devices
- Diamond and Carbon-based Materials Research
- Molecular Junctions and Nanostructures
- Force Microscopy Techniques and Applications
- Liquid Crystal Research Advancements
- Advanced Cellulose Research Studies
- Pickering emulsions and particle stabilization
- Machine Learning in Healthcare
- Integrated Circuits and Semiconductor Failure Analysis
- Hernia repair and management
- Quantum Computing Algorithms and Architecture
- Appendicitis Diagnosis and Management
- French Language Learning Methods
- Technology-Enhanced Education Studies
- Optical Polarization and Ellipsometry
- Dust and Plasma Wave Phenomena
- Quantum Mechanics and Applications
- Innovative Educational Technologies
- Near-Field Optical Microscopy
- Advanced Optical Imaging Technologies
Montana State University
2024
University of Cambridge
1997-2020
University of California, San Francisco
2020
University of Massachusetts Chan Medical School
1999
Institut Protestant de Théologie
1977
Quantum entanglement between distant qubits is an important feature of quantum networks. Distribution over long distances can be enabled through coherently interfacing qubit pairs via photonic channels. Here, we report the realization optically generated electron spin confined in two semiconductor dots. The protocol relies on spin-photon trionic Λ system and erasure Raman-photon path information. measurement a single Raman photon used to project into joint state with interferometrically...
The uncontrolled interaction of a quantum system with its environment is detrimental for coherence. For bits in the solid state, decoherence from thermal vibrations surrounding lattice can typically only be suppressed by lowering temperature operation. Here, we use nano-electro-mechanical to mitigate effect phonons on spin qubit - silicon-vacancy colour centre diamond without changing temperature. By controlling strain centre, tune electronic levels probe, control, and eventually suppress...
We derive a method for identifying the Yukawa model parameters of two-dimensional (2D) strongly coupled dusty plasmas. The is based on non-invasive observation dust component plasma and comparison with large body simulation data in form simple analytical formulas. This approach requires only input from time-series configuration snapshots particle velocities no recourse to additional information about system. In addition, we an effective coupling parameter 2D systems height first maximum pair...
Abstract The long-distance quantum transfer between electron-spin qubits in semiconductors is important for realising large-scale computing circuits. Electron-spin to photon-polarisation conversion a promising technology achieving free-space or fibre-coupled transfer. In this work, using only regular lithography techniques on conventional 15 nm GaAs well, we demonstrate acoustically-driven generation of single photons from electrons, without the need self-assembled dot. device, electron...
<h3>Hypothesis</h3> We hypothesized that hand-assisted laparoscopic surgery (a new technique involves a surgeon's hand passing through pneumoperitoneum-protecting sleeve device and assisting in surgery) is feasable outcomes are comparable to purely procedures selected cases. <h3>Design</h3> A prospective, multicenter, nonrandomized, noncontrolled study was conducted with the participation of expert surgeons. <h3>Setting</h3> Academic community medical centers 16 states. <h3>Patients</h3> Any...
We report on the feedback stabilization of zero-phonon emission frequency a single InAs quantum dot. The spectral separation phonon-assisted component resonance fluorescence provides probe detuning between transition and resonant driving laser. Using this in combination with active feedback, we stabilize against environmental fluctuations. This protocol reduces intensity noise by factor 22 correcting for bandwidth 191 Hz, limited experimental collection efficiency. associated sub-Hz...
The electronic energy levels and optical transitions of a semiconductor quantum dot are subject to dynamics within the solid-state environment. In particular, fluctuating electric fields due nearby charge traps or other dots shift transition frequencies via Stark effect. environment mapped directly onto fluorescence under resonant excitation diminish prospects as sources indistinguishable photons in computing. Here, we present an analysis resonance fluctuations based on photon counting...
The ability to discriminate between simultaneously occurring noise sources in the local environment of semiconductor InGaAs quantum dots, such as electric and magnetic field fluctuations, is key understanding their respective dynamics effect on dot coherence properties. We present a discriminatory approach all-optical sensing based two-color resonance fluorescence charged with single electron. Our measurements show that fluctuations due nuclear spins absence an external are described by two...
We present a magnetophotoluminescence study on neutral and charged excitons confined to InAs/GaAs quantum dots. Our investigation relies confocal microscope that allows arbitrary tuning of the angle between applied magnetic field sample growth axis. First, from experiments trions, we extract in-plane on-axis components Land\'e tensor for electrons holes in $s$ shell. Then, based doubly negatively exciton magnetophotoluminescence, show $p$-electron wave function spreads significantly into...
Entanglement between distant nodes is essential for the successful realisation of a distributed quantum network. Photon-mediated entanglement has recently been demonstrated in atomic [1] and diamond defect systems [2] and, very recently, using heavy hole spins dots [3]. However, until now controlled creation entangled states with arbitrary phase had yet to be these systems. Here we demonstrate high frequency Bell electron-spin qubits confined self-assembled InGaAs (QD).
Abstract The velocity data presented demonstrate the complicated flow behavior of nanocrystalline cellulose (NCC) suspensions even when standard rheometry shows only subtle effects. Rheo-nuclear magnetic resonance (NMR) velocimetry with spatial and temporal resolution indicates that NCC undergo varying behavior, which correlates bulk rheology includes wall-slip, shear banding, yielding. Large-velocity fluctuations in a chiral nematic liquid crystal-phase suspension (5% w/v) indicate particle...
Explainability in AI is crucial for model development, compliance with regulation, and providing operational nuance to predictions. The Shapley framework explainability attributes a model's predictions its input features mathematically principled model-agnostic way. However, general implementations of make an untenable assumption: that the are uncorrelated. In this work, we demonstrate unambiguous drawbacks assumption develop two solutions respect data manifold. One solution, based on...
We present a survey of the solid state environment quantum dot utilising resonance fluorescence as sensitive probe. Nucler field fluctuations are identified with 10 microseconds correlation times by comparison to theoretical model.
The electronic energy levels and optical transitions of a semiconductor quantum dot are subject to dynamics within the solid-state environment. In particular, fluctuating electric fields due nearby charge traps or other dots shift transition frequencies via Stark effect. environment mapped directly onto fluorescence under resonant excitation diminish prospects as sources indistinguishable photons in computing. Here, we present an analysis resonance fluctuations based on photon counting...
We analyse the magneto-photoluminescence of triply negatively charged excitons coupled to a continuum states.The excitonic complex is conned StranskiKrastanow InAs/GaAs quantum dot embedded in Schottky diode.Dierent orientations magnetic eld have been investigated.A modelling Coulomb blockade together with calculation electron FockDarwin spectrum has allowed us predict elds anticrossing between energy states and wetting layer Landau levels.Good agreement theoretical model experimental...
Since the evolution of ferroelectric liquid crystal (FLC) on silicon spatial light modulator (SLM) 1 , there have been improvements in resolution, speed and optical quality 2 3 . The SLM we are presenting here contains to all these factors as well fill factor, dynamics fabrication techniques. has 320x240 pixels a 34μm pitch fits onto 14mm square die. was designed for maximum factor high operation with suitable FLC. To this end it is addressed using 64 bit bus integrated circuitry includes...