Sub Decoherence Time Generation and Detection of Orbital Entanglement
arXiv:1501.04007 · doi:10.1103/PhysRevLett.114.176803
Abstract
Recent experiments have demonstrated sub decoherence 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 timescale 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, opening up for an unambiguous short-time Bell inequality test of orbital entanglement.
5 pages, 2 figures, 3 pages supplemental material
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- Optimal Entanglement Witness for Cooper Pair Splitters
- Quantum uncertainty of optical coherence