A5028931476- Quantum Information and Cryptography
- Photonic and Optical Devices
- Quantum and electron transport phenomena
- Particle physics theoretical and experimental studies
- Quantum optics and atomic interactions
- Semiconductor Quantum Structures and Devices
- Mechanical and Optical Resonators
- Silicon and Solar Cell Technologies
- Nanowire Synthesis and Applications
- Neutrino Physics Research
- Neural Networks and Reservoir Computing
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Ion-surface interactions and analysis
- Integrated Circuits and Semiconductor Failure Analysis
- High-Energy Particle Collisions Research
- Advanced Mathematical Theories and Applications
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Force Microscopy Techniques and Applications
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Silicon Nanostructures and Photoluminescence
- Near-Field Optical Microscopy
- Photonic Crystals and Applications
Simon Fraser University
2015-2022
University of British Columbia
2015
Donor spins in silicon are highly competitive qubits for upcoming quantum technologies, offering complementary metal-oxide semiconductor compatibility, coherence (T2) times of minutes to hours, and simultaneous initialization, manipulation, readout fidelities near ~99.9%. This allows many error correction protocols, which will be essential scale-up. However, a proven method reliably coupling spatially separated donor has yet identified. We present scalable silicon-based platform using the...
Commercially impactful quantum algorithms such as chemistry and Shor's algorithm require a number of qubits gates far beyond the capacity any existing processor. Distributed architectures, which scale horizontally by networking modules, provide route to commercial utility will eventually surpass capability single computing module. Such processors consume remote entanglement distributed between modules realize logic. Networked computers therefore rapidly distribute high fidelity modules. Here...
The silicon T centre combines long spin coherence times and telecommunications-band optical transitions. We integrate centres with photonic devices measure the first all-optical single qubit in silicon, establishing a new spin-photon platform.
In a recent paper, Gurzadyan & Penrose claim to have found directions in the sky around which there are multiple concentric sets of annuli with anomalously low variance cosmic microwave background (CMB). These features presented as evidence for particular theory pre-Big Bang Universe. We able reproduce analysis these authors data from WMAP satellite and we confirm existence apparently special newer Planck data. However, also find that present at same level abundance simulated Gaussian CMB...
The deep double donor levels of substitutional chalcogen impurities in silicon have unique optical properties which may enable a spin/photonic quantum technology. interstitial magnesium impurity (${\mathrm{Mg}}_{i}$) is also but has not yet been studied the same detail as chalcogens. In this paper, we look at neutral and singly ionized ${\mathrm{Mg}}_{i}$ absorption spectra natural isotopically enriched 28-silicon more detail. $1\mathrm{s}({\mathrm{A}}_{1}$) to...
Silicon is the most developed electronic and photonic technological platform hosts some of highest-performance spin qubits to date. A hybrid quantum technology harnessing an efficient spin-photon interface in silicon would unlock considerable potential by enabling ultra-long-lived memories, distributed networks, microwave optical photon converters, spin-based processors, all linked using integrated photonics. However, indirect bandgap makes identification interfaces nontrivial. Here we build...
We use the greatly improved optical linewidths provided by highly enriched $^{28}$Si to study a photoluminescence line near 1017 meV previously observed in luminescence spectrum of natural Si diffused with Mg, and suggested result from recombination an isoelectronic bound exciton localized at Mg-pair center. In this no-phonon is found be comprised five components whose relative intensities closely match abundances Mg-pairs formed random combinations three stable isotopes thus confirming...
The performance of modular, networked quantum technologies will be contingent upon the quality their light-matter interconnects. Solid-state colour centres, and in particular T centres silicon, offer competitive technological commercial advantages as basis for networking distributed computing. These newly rediscovered silicon defects direct telecommunications-band photonic emission, long-lived electron nuclear spins, proven integration into industry-standard, CMOS-compatible,...