Flux qubit on mesoscopic nonsuperconducting ring
arXiv:cond-mat/0609134 · doi:10.1103/PhysRevB.74.125426
Abstract
The possibility of making a flux qubit on nonsuperconducting mesoscopic ballistic quasi 1D ring is discussed. We showed that such ring can be effectively reduced to a two-state system with two external control parameters. The two states carry opposite persistent currents and are coupled by tunneling which leads to a quantum superposition of states. The qubit states can be manipulated by resonant microwave pulses. The flux state of the sample can be measured by a SQUID magnetometer. Two or more qubits can be coupled by the flux the circulating currents generate. The problem of decoherence is also discussed.
Phys. Rev. B. (accepted)
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- Magnetic flux in mesoscopic rings: Quantum Smoluchowski regime
- Delayed creation of entanglement in superconducting qubits interacting with a microwave field
- Quantum gambling using mesoscopic ring qubits
- Persistent Currents in Normal Metal Rings (Yale PhD thesis)
- Entanglement of flux qubits through a joint detection of photons
- Flux-biased mesoscopic rings