Loss of entanglement in quantum mechanics due to the use of realistic measuring rods

2007/08/31 by Rodolfo Gambini, Rafael A. Porto, Jorge Pullin · 2 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum Mechanics and Applications #gr-qc #quant-ph

paper · pdf · doi:10.1016/j.physleta.2007.09.036

published as Phys.Lett.A372:1213-1218,2008 · 6 pages, RevTex, no figures, small changes, published version

openalex publication_date 2007/09/23 · arxiv created 2008/02/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We show that the use of real measuring rods in quantum mechanics places a fundamental gravitational limit to the level of entanglement that one can ultimately achieve in quantum systems. The result can be seen as a direct consequence of the fundamental gravitational limitations in the measurements of length and time in realistic physical systems. The effect may have implications for long distance teleportation and the measurement problem in quantum mechanics.

Citations

• Fundamental decoherence from quantum gravity: a pedagogical review
• Environment-induced superselection rules

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