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Discovery Projects - Grant ID: DP150101863

Discovery Projects - Grant ID: DP150101863
ARC | Discovery Projects
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  • Coherent control via weak measurements in $^{31}$P single-atom electron and nuclear spin qubits

    Muhonen, J. T.; Dehollain, J. P.; Laucht, A.; Simmons, S.; Kalra, R.; Hudson, F. E.; Jamieson, D. N.; McCallum, J. C.; Itoh, K. M.; Dzurak, A. S.; Morello, A. (2017)
    Projects: ARC | Discovery Projects - Grant ID: DP150101863 (DP150101863)
    The understanding of weak measurements and interaction-free measurements has greatly expanded the conceptual and experimental toolbox to explore the quantum world. Here we demonstrate single-shot variable-strength weak measurements of the electron and the nuclear spin states of a single $^{31}$P donor in silicon. We first show how the partial collapse of the nuclear spin due to measurement can be used to coherently rotate the spin to a desired pure state. We explicitly demonstrate that phase ...

    Exploring quantum chaos with a single nuclear spin

    Mourik, Vincent; Asaad, Serwan; Firgau, Hannes; Pla, Jarryd J.; Holmes, Catherine; Milburn, Gerard J.; McCallum, Jeffrey C.; Morello, Andrea (2017)
    Projects: ARC | Discovery Projects - Grant ID: DP150101863 (DP150101863)
    Among the many controversial aspects of the quantum / classical boundary, the emergence of chaos remains amongst the least experimentally verified. In particular, the time-resolved observation of quantum chaotic dynamics, and its interplay with quantum measurement, is largely unexplored outside experiments in atomic ensembles. We present here a realistic proposal to construct a chaotic driven top from the nuclear spin of a single donor atom in silicon, in the presence of nuclear quadrupole in...

    Strain-Induced Spin-Resonance Shifts in Silicon Devices

    Pla , J.; Bienfait , A.; Pica , G.; Mansir , J.; Mohiyaddin , F ,; Zeng , Z.; Niquet , Yann-Michel; Morello , A.; Schenkel , T.; Morton , J. J. L. ,; Bertet , P. (2018)
    Projects: ARC | Discovery Projects - Grant ID: DP150101863 (DP150101863), EC | MOS-QUITO (688539), EC | QURAM (630070), EC | ASCENT (279781), EC | CIRQUSS (615767)
    International audience; In spin-based quantum information processing devices, the presence of control and detection circuitry can change the local environment of a spin by introducing strain and electric fields, altering its resonant frequencies. These resonance shifts can be large compared to intrinsic spin line-widths and it is therefore important to study, understand and model such effects in order to better predict device performance. Here we investigate a sample of bismuth donor spins im...
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