{"paper":{"title":"Noiseless Quantum Codes","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"3), 3) ((1) ISI Foundation, (3) INFM Politecnico di Torino), M. Rasetti (2, Politecnico di Torino, P. Zanardi (1, Torino (2) Dipartimento di fisica","submitted_at":"1997-05-26T10:11:06Z","abstract_excerpt":"In this paper we study a model quantum register $\\cal R$ made of $N$ replicas (cells) of a given finite-dimensional quantum system S. Assuming that all cells are coupled with a common environment with equal strength we show that, for $N$ large enough, in the Hilbert space of $\\cal R$ there exists a linear subspace ${\\cal C}_N$ which is dynamically decoupled from the environment. The states in ${\\cal C}_N$ evolve unitarily and are therefore decoherence-dissipation free. The space ${\\cal C}_N$ realizes a noiseless quantum code in which information can be stored, in principle, for arbitrarily lon"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9705044","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/quant-ph/9705044/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}