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| related topics |
| {time, decoherence, evolution} |
| {energy, state, states} |
| {temperature, thermal, energy} |
| {wave, scattering, interference} |
| {level, atom, field} |
| {light, field, probe} |
| {qubit, qubits, gate} |
| {trap, ion, state} |
| {photon, photons, single} |
| {measurement, state, measurements} |
| {field, particle, equation} |
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|
Quantum computing and quantum measurement with mesoscopic Josephson
junctions
D. V. Averin
abstract: Recent experimental demonstrations of quantum coherence of the charge and
flux states of Josephson junctions show that the quantum Josephson dynamics can
be used to develop scalable quantum logic circuits. In this work, I review the
basic concepts of Josephson tunneling and Josephson-junction qubits, and
discuss two problems of this tunneling motivated by quantum computing
applications. One is the theory of photon-assisted resonant flux tunneling in
SQUID systems used to demonstrate quantum coherence of flux. Another is the
problem of quantum measurement of charge with the SET electrometer. It is shown
that the SET electrometer at the Coulomb blockade threshold is the
quantum-limited detector with energy sensitivity reaching $\hbar/\sqrt{3}$ in
the resonant-tunneling regime.
- oai_identifier:
- oai:arXiv.org:quant-ph/0008114
- categories:
- quant-ph cond-mat
- comments:
- 13 pages, 10 figures; to appear in the Speical Issue of "Forschritte
der Physik"
- arxiv_id:
- quant-ph/0008114
- created:
- 2000-08-26
Full article ▸
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