2007/07/31 by E. A. Meirom, Eli A. Meirom, N. H. Lindner +7 · 14 citations
Chemistry · Computer Science · Physics and Astronomy · #Ambiguity #Biexciton #Cascade #Chemistry #Computer science #Path (computing) #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum entanglement #Quantum mechanics #Semiconductor Quantum Structures and Devices #Statistical physics #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1103/physreva.77.062310
published in Physical Review A 77(6) (American Physical Society)
arxiv created 2008/03/28 · openalex publication_date 2008/06/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.