title: Subdecoherence time generation and detection of orbital entanglement in quantum dots.
abstract: Recent experiments have demonstrated subdecoherence time control of individual single-electron orbital qubits. Here we propose a quantum-dot-based scheme for generation and detection of pairs of orbitally entangled electrons on a time scale much shorter than the decoherence time. The electrons are entangled, via two-particle interference, and transferred to the detectors during a single cotunneling event, making the scheme insensitive to charge noise. For sufficiently long detector dot lifetimes, cross-correlation detection of the dot charges can be performed with real-time counting techniques, providing for an unambiguous short-time Bell inequality test of orbital entanglement.
authors.affiliation: Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden.
authors.forename: F
authors.initials: F
authors.lastname: Brange
authors.affiliation: Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden.
authors.forename: O
authors.initials: O
authors.lastname: Malkoc
authors.affiliation: Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Samuelsson