8,049 research outputs found
Quantum plateau of Andreev reflection induced by spin-orbit coupling
In this work we uncover an interesting quantum plateau behavior for the
Andreev reflection between a one-dimensional quantum wire and superconductor.
The quantum plateau is achieved by properly tuning the interplay of the
spin-orbit coupling within the quantum wire and its tunnel coupling to the
superconductor. This plateau behavior is justified to be unique by excluding
possible existences in the cases associated with multi-channel quantum wire,
the Blonder-Tinkham-Klapwijk continuous model with a barrier, and lattice
system with on-site impurity at the interface.Comment: 6 pages, 3 figures
High coherent solid-state qubit from a pair of quantum dots
In this letter we propose a scheme to build up high coherent solid-state
quantum bit (qubit) from two coupled quantum dots. Quantum information is
stored in electron-hole pair state with the electron and hole locating in
different dots, and universal quantum gates involving any pair of qubits are
realized by effective coupling interaction via virtually exchanging cavity
photons.Comment: 3 pages, 1 figur
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