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Open Quantum Systems Decoherence
Quantum Simulation
On the Limits of Information Retrieval in Quantum Mechanics
arXiv
Authors: Peter B. Lerner
Year
2013
Paper ID
31726
Status
Preprint
Abstract Read
~2 min
Abstract Words
75
Citations
N/A
Abstract
The widely considered assertion is that the unitarity of quantum mechanical evolution assures the preservation of information. It is even promoted in popular literature as an established fact. (Susskind, 2008) Yet, a simple chain of reasoning demonstrates that: 1) almost any evolutionary operator can be well approximated by a degenerate (finite-rank) operator and 2) one needs an eternity to retrieve information exactly from a nonstationary quantum state and to distinguish between arbitrary unitary operator and its finite-dimensional approximations.
Why This Paper Matters
- This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
- It adds a 2013 reference point for readers tracking recent quantum research.
- The widely considered assertion is that the unitarity of quantum mechanical evolution assures the preservation of information.
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