Entanglement distillation by adiabatic passage in coupled quantum dots
arXiv:cond-mat/0412229 · doi:10.1103/PhysRevB.72.201304
Abstract
Adiabatic passage of two correlated electrons in three coupled quantum dots is shown to provide a robust and controlled way of distilling, transporting and detecting spin entanglement, as well as of measuring the rate of spin disentanglement. Employing tunable interdot coupling the scheme creates, from an unentangled two-electron state, a superposition of spatially separated singlet and triplet states. A single measurement of a dot population (charge) collapses the wave function to either of these states, realizing entanglement to charge conversion. The scheme is robust, with the efficiency close to 100%, for a large range of realistic spectral parameters.
5 pages, 4 figures
References in corpus (16)
- Quantum Computation with Quantum Dots
- Electron transport through double quantum dots
- Coupled quantum dots as quantum gates
- Coherent manipulation of electronic states in a double quantum dot
- Manipulation of a single charge in a double quantum dot
- Zeeman energy and spin relaxation in a one-electron quantum dot
- Hilbert space structure of a solid state quantum computer: two-electron states of a double quantum dot artificial molecule
- Probing Entanglement and Non-locality of Electrons in a Double-Dot via Transport and Noise
- Spin-entangled currents created by a triple quantum dot
- Electron Entanglement via a Quantum Dot
- Entanglement of solid-state qubits by measurement
- Solid-state circuit for spin entanglement generation and purification
- Detecting entanglement using a double quantum dot turnstile
- Double quantum dot turnstile as an electron spin entangler
- Generation of spatially-separated spin entanglement in a triple quantum dot system
- Parity measurement of one- and two-electron double well systems
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