Distilling entanglement from cascades with partial "Which Path" ambiguity
arXiv:0707.1511 · doi:10.1103/PhysRevA.77.062310
Abstract
We develop a framework to calculate the density matrix of a pair of photons emitted in a decay cascade with partial "which path" ambiguity. We describe an appropriate entanglement distillation scheme which works also for certain random cascades. The qualitative features of the distilled entanglement are presented in a two dimensional "phase diagram". The theory is applied to the quantum tomography of the decay cascade of a biexciton in a semiconductor quantum dot. Agreement with experiment is obtained.
References in corpus (9)
- Quantum entanglement
- Quantum Cryptography
- Experimental quantum teleportation
- On the Measurement of Qubits
- Experimental realization of Shor's quantum factoring algorithm using nuclear magnetic resonance
- Entangled Photon Pairs from Semiconductor Quantum Dots
- Improved fidelity of triggered entangled photons from single quantum dots
- Quantum-tomography of entangled photon pairs by quantum-dot cascade decay
- Polarization sensitive spectroscopy of charged Quantum Dots
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