{"paper":{"title":"Photon echo without a free induction decay in a double-Lambda system","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jevon J. Longdell, Matthew J. Sellars, Patrick M. Ledingham, Sarah E. Beavan","submitted_at":"2010-12-28T20:15:12Z","abstract_excerpt":"We have characterized a novel photon-echo pulse sequence for a double-$\\Lambda$ type energy level system where the input and rephasing transitions are different to the applied $\\pi$-pulses. We show that despite having imperfect $\\pi$-pulses (associated with large coherent emission due to free induction decay), the noise added is only 0.019$\\pm$0.001 relative to the shot noise in the spectral mode of the echo. Using this echo pulse sequence in the `rephased amplified spontaneous emission' (RASE) scheme \\cite{Ledingham2010} will allow for generation of entangled photon pairs that are in differen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5830","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}