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We present the experimental demonstration of quantum Hamiltonian learning. Using an integrated silicon-photonics quantum simulator with the classical machine learning technique, we successfully learn the Hamiltonian dynamics of a diamond nitrogen-vacancy center's electron ground-state spin.
Integrated silicon photonics offers great potential for quantum communication devices in terms of robustness and scalability. Here we demonstrate high-speed low-error QKD using silicon photonic devices combining slow thermo-optic DC biases and fast carrier-depletion modulation.
Quantum Phase Estimation (PE) is a fundamental building block in the framework of Quantum Computing. Accurate estimation of the true eigenphase φ0 of a known eigenstate |φ〉 is fundamental for the implementation of many promising quantum algorithms. The interest in PE is also due to the modest quantum hardware requirements of the Iterative Phase Estimation Algorithm (IPEA) implementation [1], successfully...
We present a new, scalable protocol for solving the eigenvalue problem requiring the measurement of only one qubit. We implement this protocol on a silicon quantum photonic device embedding arbitrary non-compiled controlled unitary operations.
We present the first experimental demonstration of quantum entanglement distribution between silicon integrated photonic chips, linked by a single mode optical fiber. Entanglement states generation, transmission, manipulation and measurement are implemented intra/inter chips.
Quantum information science aims to harness uniquely quantum mechanical properties to enhance measurement, information and communication technologies, as well as to explore fundamental aspects of quantum physics. Of the various approaches to quantum computing [1], photons are particularly appealing for their low-noise properties and ease of manipulation at the single qubit level [2]. Encoding quantum...
Quantum dot (QD) systems containing electron spins may hold a role in a future photonic quantum circuit as a means of storing a quantum state in a spin superposition. In general, the spin superposition state maps directly to a photon emitted out of the plane (kz) with the photon in a polarization superposition. In waveguides, however, this is more difficult: one requires a waveguide mode that is able...
Progress towards the development of a quantum integrated photonics platform on GaAs will be reported, including on-chip single photon sources, detectors, splitters, couplers and modulators.
We demonstrate a reconfigurable quantum photonic circuit with eight phase shifters. We use this device to generate and characterise maximally entangled two-qubit states, violate Bell inequalities, and generate single-photon mixed states.
The need for developing a self-sustaining urban farm greenhouse project in a cold-weather climate is discussed. A greenhouse heating system solution based on a hybrid geothermal-solar photovoltaic system is proposed. Specific greenhouse heat loss mechanisms are investigated. Implementation of a community outreach website information dissemination plan is outlined.
Although practical realisation of a fully functioning quantum computer is still a long way off, recent progress both experimentally and theoretically is paving the way for possible implementations. One of the leading approaches is quantum optics, where photons are used as carriers of quantum information, and are manipulated in both linear and non-linear optical circuits. More recently, advances in...
We demonstrate the first 1550 nm correlated photon-pair source in a highly nonlinear integrated glass waveguide. A pair coincidence rate of 80 s was achieved with the correlation ratio limited by Raman effects.
We describe our developments in integrated quantum photonics, including waveguide circuits to implement quantum logic operations, quantum metrology and quantum walks.
The needs of companies in the hybrid and electric vehicle business have been used to define a BS specialty in hybrid vehicles for electrical engineers at Kettering University. Two of the courses in this specialty are new courses whose development is sponsored by the US Department of Energy. Each course will be complemented by a laboratory that is also supported by the US Department of Energy. Both...
The efficiency of the electric drive system in a Hybrid Electric Vehicle plays a significant role in overall hybrid propulsion system efficiency and influences design choices for other mechanical components in the system. Increasing the DC bus voltage is thought to improve overall powertrain efficiency. In this paper, models are developed to predict the effect of DC bus voltage on the power loss in...
External-cavity mode-locking of a quantum-dot laser is demonstrated with record-low repetition-rates of 310MHz, and harmonic repetition-rates up to 4GHz. Fourier-limited 930fs pulse generation is achieved. The pulse-energy of ∼0.45pJ is independent of operating conditions.
A dynamic model of passive mode-locking in quantum-dot laser diodes is presented. It is found that in contrast with quantum-well lasers, rapid gain recovery is key for mode-locking of quantum-dot lasers.
Beam profiling of broad area quantum-dot VCSEL is presented with 10Gb/s data transmission over 300m of MMF. Single mode-performance with SMSR of 35dB is achieved with no significant impairment of the modulation performance.
For the first time hybrid and passive mode-locking jitter performance is investigated in 40GHz quantum-dot mode-locked lasers. Record low passive mode-locking jitter of 219fs is presented, along with promising hybrid mode-locking results of 124fs.
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