Journal
PHYSICAL REVIEW A
Volume 85, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.85.052127
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Funding
- Austrian Science Fund (FWF) [P20748-N16, P24273-N16, SFB F40-FoQus F4012-N16]
- European Union (NAMEQUAM)
- Austrian Science Fund (FWF) [P 20748] Funding Source: researchfish
- Austrian Science Fund (FWF) [P20748] Funding Source: Austrian Science Fund (FWF)
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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.
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