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pro vyhledávání: '"Dragt, Alex J."'
Autor:
Abell, Dan T., Dragt, Alex J.
Publikováno v:
Int. J. Comput. Math., Vol. 99, Iss. 1, January 2022, 89-112
To a very good approximation, particularly for hadron machines, charged-particle trajectories in accelerators obey Hamiltonian mechanics. During routine storage times of eight hours or more, such particles execute some $10^{8}$ revolutions about the
Externí odkaz:
http://arxiv.org/abs/2211.00252
Autor:
Mitchell, Chad E., Dragt, Alex J.
Publikováno v:
Phys.Rev.ST Accel.Beams 13:064001,2010
The behavior of orbits in charged-particle beam transport systems, including both linear and circular accelerators as well as final focus sections and spectrometers, can depend sensitively on nonlinear fringe-field and high-order-multipole effects in
Externí odkaz:
http://arxiv.org/abs/1001.1447
Autor:
Dutta, S. K., Strauch, Frederick W., Lewis, R. M., Mitra, Kaushik, Paik, Hanhee, Palomaki, T. A., Tiesinga, Eite, Anderson, J. R., Dragt, Alex J., Lobb, C. J., Wellstood, F. C.
Publikováno v:
Phys. Rev. B 78, 104510 (2008)
We present Rabi oscillation measurements of a Nb/AlOx/Nb dc superconducting quantum interference device (SQUID) phase qubit with a 100 um^2 area junction acquired over a range of microwave drive power and frequency detuning. Given the slightly anharm
Externí odkaz:
http://arxiv.org/abs/0806.4711
Autor:
Johnson, Philip R., Parsons, William T., Strauch, Frederick W., Anderson, J. R., Dragt, Alex J., Lobb, C. J., Wellstood, F. C.
Publikováno v:
Phys. Rev. Lett. 94, 187004 (2005)
Prototype Josephson-junction based qubit coherence times are too short for quantum computing. Recent experiments probing superconducting phase qubits have revealed previously unseen fine splittings in the transition energy spectra. These splittings h
Externí odkaz:
http://arxiv.org/abs/quant-ph/0411181
Autor:
Strauch, Frederick W., Johnson, Philip R., Dragt, Alex J., Lobb, C. J., Anderson, J. R., Wellstood, F. C.
Publikováno v:
Phys. Rev. Lett. 91, 167005 (2003)
Based on a quantum analysis of two capacitively coupled current-biased Josephson junctions, we propose two fundamental two-qubit quantum logic gates. Each of these gates, when supplemented by single-qubit operations, is sufficient for universal quant
Externí odkaz:
http://arxiv.org/abs/quant-ph/0303002
Autor:
Johnson, Philip R., Strauch, Frederick W., Dragt, Alex J., Ramos, Roberto C., Lobb, C. J., Anderson, J. R., Wellstood, F. C.
Publikováno v:
PRB 67, 020509(R) (2003)
We show that two capacitively-coupled Josephson junctions, in the quantum limit, form a simple coupled qubit system with effective coupling controlled by the junction bias currents. We compute numerically the energy levels and wave functions for the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0210278
Autor:
Dragt, Alex J., Habib, Salman
It is shown that, while Wigner and Liouville functions transform in an identical way under linear symplectic maps, in general they do not transform identically for nonlinear symplectic maps. Instead there are ``quantum corrections'' whose hbar tendin
Externí odkaz:
http://arxiv.org/abs/quant-ph/9806056
Akademický článek
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Akademický článek
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Autor:
Johnson, Philip R., Strauch, Frederick W., Dragt, Alex J., Anderson, James R., Lobb, Christopher J., Wellstood, Frederick C.
Publikováno v:
Proceedings of SPIE; Nov2004, Issue 1, p232-241, 10p