2012/04/30 by Florian Fröwis · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Geometry #Law #Mathematics #Multipartite #Multipartite entanglement #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum discord #Quantum entanglement #Quantum information #Quantum mechanics #Square root #Squashed entanglement #Statistical physics #Time evolution #Unitary state #W state #quant-ph
paper · pdf · doi:10.1103/physreva.85.052127
published as Phys. Rev. A 85, 052127 (2012) · 5+ pages, 2 figures. Comments are welcome! v2: Correction of several typos
openalex publication_date 2012/05/29 · arxiv created 2012/05/31 · arxiv updated 2012/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The ``speed'' of unitary quantum evolution was recently shown to be connected to entanglement in multipartite quantum systems. Here, we discuss a tighter version of the Mandelstam-Tamm uncertainty relation that depends on the Fisher information. The passage time is estimated by a lower bound that depends inversely proportional to the square root of the Fisher information. This leads to a better understanding of the origin of a fast quantum time-evolution of entangled states.