Zobrazeno 1 - 10
of 100
pro vyhledávání: '"DiVincenzo, D. P."'
Autor:
Jerger, M., Motzoi, F., Gao, Y., Dickel, C., Buchmann, L., Bengtsson, A., Tancredi, G., Warren, C. W., Bylander, J., DiVincenzo, D., Barends, R., Bushev, P. A.
A key challenge in quantum computing is speeding up measurement and initialization. Here, we experimentally demonstrate a dispersive measurement method for superconducting qubits that simultaneously measures the qubit and returns the readout resonato
Externí odkaz:
http://arxiv.org/abs/2406.04891
Publikováno v:
Phys. Rev. B 99, 014514 (2019)
Nonreciprocal devices effectively mimic the breaking of time-reversal symmetry for the subspace of dynamical variables that they couple, and can be used to create chiral information processing networks. We study the systematic inclusion of ideal gyra
Externí odkaz:
http://arxiv.org/abs/1810.08471
Autor:
Samkharadze, N., Bruno, A., Scarlino, P., Zheng, G., DiVincenzo, D. P., DiCarlo, L., Vandersypen, L. M. K.
Publikováno v:
Phys. Rev. Applied 5, 044004 (2016)
We present superconducting microwave-frequency resonators based on NbTiN nanowires. The small cross section of the nanowires minimizes vortex generation, making the resonators resilient to magnetic fields. Measured intrinsic quality factors exceed $2
Externí odkaz:
http://arxiv.org/abs/1511.01760
Publikováno v:
Phys. Rev. B 93, 045418 (2016)
We theoretically investigate the backaction of a sensor quantum dot with strong local Coulomb repulsion on the transient dynamics of a qubit that is probed capacitively. We show that the measurement backaction induced by the noise of electron cotunne
Externí odkaz:
http://arxiv.org/abs/1508.05259
Publikováno v:
Phys. Rev. B 90, 134515(2014)
We perform a detailed analysis of how an amplified interferometer can be used to enhance the quality of a dispersive qubit measurement, such as one performed on a superconducting transmon qubit, using homodyne detection on an amplified microwave sign
Externí odkaz:
http://arxiv.org/abs/1407.3059
Publikováno v:
Phys. Rev. B 89, 195405 (2014)
A sensitive technique for the readout of the state of a qubit is based on the measurement of the conductance through a proximal sensor quantum dot (SQD). Here, we theoretically study the coherent backaction of such a measurement on a coupled SQD-char
Externí odkaz:
http://arxiv.org/abs/1310.2519
Autor:
Medford, J., Beil, J., Taylor, J. M., Bartlett, S. D., Doherty, A. C., Rashba, E. I., DiVincenzo, D. P., Lu, H., Gossard, A. C., Marcus, C. M.
Publikováno v:
Nature Nanotechnology 8, 654 (2013)
We report initialization, complete electrical control, and single-shot readout of an exchange-only spin qubit. Full control via the exchange interaction is fast, yielding a demonstrated 75 qubit rotations in under 2 ns. Measurement and state tomograp
Externí odkaz:
http://arxiv.org/abs/1302.1933
Autor:
Bonesteel, N. E., DiVincenzo, D. P.
Publikováno v:
Phys. Rev. B 86, 165113 (2012)
We construct quantum circuits for measuring the commuting set of vertex and plaquette operators that appear in the Levin-Wen model for doubled Fibonacci anyons. Such measurements can be viewed as syndrome measurements for the quantum error-correcting
Externí odkaz:
http://arxiv.org/abs/1206.6048
Publikováno v:
Phys. Rev. B 82 075403 (2010)
Initialization, manipulation, and measurement of a three-spin qubit are demonstrated using a few-electron triple quantum dot, where all operations can be driven by tuning the nearest-neighbor exchange interaction. Multiplexed reflectometry, applied t
Externí odkaz:
http://arxiv.org/abs/1005.0273
Autor:
Bertet, P., Chiorescu, I., Burkard, G., Semba, K., Harmans, C. J. P. M., DiVincenzo, D. P., Mooij, J. E.
Publikováno v:
Phys. Rev. Lett. 95, 257002 (2005)
We have studied the dephasing of a superconducting flux-qubit coupled to a DC-SQUID based oscillator. By varying the bias conditions of both circuits we were able to tune their effective coupling strength. This allowed us to measure the effect of suc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512428