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Paper 1
Quantum switching networks for perfect qubit routing
C. Facer, J. Twamley, J. D. Cresser
- Year
- 2007
- Journal
- arXiv preprint
- DOI
- arXiv:0706.3821
- arXiv
- 0706.3821
We develop the work of Christandl et al. [M. Christandl, N. Datta, T. C. Dorlas, A. Ekert, A. Kay, and A. J. Landahl, Phys. Rev. A 71, 032312 (2005)], to show how a d-hypercube homogenous network can be dressed by additional links to perfectly route quantum information between any given input and output nodes in a duration which is independent of the routing chosen and, surprisingly, size of the network.
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Single-spin spectroscopy of spontaneous and phase-locked spin torque oscillator dynamics
Adrian Solyom, Michael Caouette-Mansour, Brandon Ruffolo, Patrick Braganca, Lilian Childress, Jack Sankey
- Year
- 2023
- Journal
- arXiv preprint
- DOI
- arXiv:2307.16049
- arXiv
- 2307.16049
We employ N-$V$ magnetometry to measure the stray field dynamics of a ferromagnetic permalloy nanowire driven by spin-orbit torques. Specifically, we observe the optically detected magnetic resonance (ODMR) signatures of both spontaneous DC-driven magnetic oscillations and phase-locking to a second harmonic drive, developing a simple macrospin model that captures the salient features. We also observe signatures of dynamics beyond the macrospin model, including an additional ODMR feature (associated with a second SW mode) and one mode sapping power from another. Our results provide additional insight into N-$V$-spin wave coupling mechanisms, and represent a new modality for sub-wavelength N-$V$ scanned probe microscopy of nanoscale magnetic oscillators.
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