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For the past two and a half decades, anomalous heating of trapped ions from nearby electrode surfaces has continued to demonstrate unexpected results. Caused by electric-field noise, this heating of the ions' motional modes remains an obstacle for sc
Externí odkaz:
http://arxiv.org/abs/2104.07818
We investigate the work function (WF) variation of different Au crystallographic surface orientations with carbon atom adsorption. Ab-initio calculations within density-functional theory are performed on carbon deposited (100), (110), and (111) gold
Externí odkaz:
http://arxiv.org/abs/1903.00337
Autor:
Jooya, H. Z., McKay, K. S., Kim, E., Weck, P. F., Pappas, D. P., Hite, D. A., Sadeghpour, H. R.
Publikováno v:
Surface Science 677 (2018) 232-238
The variation of the work function upon carbon adsorption on the reconstructed Au(110) surface is measured experimentally and compared to density functional calculations. The adsorption dynamics is simulated with ab-initio molecular dynamics techniqu
Externí odkaz:
http://arxiv.org/abs/1805.06931
Publikováno v:
MRS Advances (2017)
Electric-field noise from the surfaces of ion-trap electrodes couples to the ion's charge causing heating of the ion's motional modes. This heating limits the fidelity of quantum gates implemented in quantum information processing experiments. The ex
Externí odkaz:
http://arxiv.org/abs/1701.04814
Autor:
Kim, E., Safavi-Naini, A., Hite, D. A., McKay, K. S., Pappas, D. P., Weck, P. F., Sadeghpour, H. R.
Publikováno v:
Phys. Rev. A 95, 033407 (2017)
The decoherence of trapped-ion quantum gates due to heating of their motional modes is a fundamental science and engineering problem. This heating is attributed to electric-field noise arising from the trap-electrode surfaces. In this work, we invest
Externí odkaz:
http://arxiv.org/abs/1610.01079
Autor:
McKay, K. S., Hite, D. A., Colombe, Y., Jördens, R., Wilson, A. C., Slichter, D. H., Allcock, D. T. C., Leibfried, D., Wineland, D. J., Pappas, D. P.
We describe an ex-situ surface-cleaning procedure that is shown to reduce motional heating from ion-trap electrodes. This precleaning treatment, to be implemented immediately before the final assembly and vacuum processing of ion traps, removes surfa
Externí odkaz:
http://arxiv.org/abs/1406.1778
Autor:
Hite, D. A., Colombe, Y., Wilson, A. C., Brown, K. R., Warring, U., Jördens, R., Jost, J. D., Pappas, D. P., Leibfried, D., Wineland, D. J.
Publikováno v:
Phys. Rev. Lett. 109, 103001 (2012)
Anomalous heating of trapped atomic ions is a major obstacle to their use as quantum bits in a scalable quantum computer. The physical origin of this heating is not fully understood, but experimental evidence suggests that it is caused by electric-fi
Externí odkaz:
http://arxiv.org/abs/1112.5419
Autor:
Cooper, K. B., Steffen, Matthias, McDermott, R., Simmonds, R. W., Oh, Seongshik, Hite, D. A., Pappas, D. P., Martinis, John M.
We have detected coherent quantum oscillations between Josephson phase qubits and microscopic critical-current fluctuators by implementing a new state readout technique that is an order of magnitude faster than previous methods. The period of the osc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405710
Although Josephson junction qubits show great promise for quantum computing, the origin of dominant decoherence mechanisms remains unknown. We report Rabi oscillations for an improved phase qubit, and show that their coherence amplitude is significan
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402470
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