2000/06/22 by Diego A. R. Dalvit, Dalvit, Diego A. R., Jacek Dziarmaga +3
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed Matter (cond-mat) #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Mechanics and Applications #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/0006349
9 pages, 5 figures. Talk to be given at NATO Advanced Research Workshop (Mykonos, Greece), and at the XL Crakow School of Theoretical Physics (Zakopane, Poland)
arxiv created 2000/06/22 · openalex publication_date 2000/06/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider quantum superposition states in Bose-Einstein condensates. A decoherence rate for the Schrödinger cat is calculated and shown to be a significant threat to this macroscopic quantum superposition of BEC's. An experimental scenario is outlined where the decoherence rate due to the thermal cloud is dramatically reduced thanks to trap engineering and "symmetrization" of the environment. We show that under the proposed scenario the Schroedinger cat belongs to an approximate decoherence-free pointer subspace. This paper is a simplified and more pedagogical version of our previous work, Phys.Rev. A62, 13607 (2000).