Journal
PHYSICAL REVIEW A
Volume 79, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.024302
Keywords
matrix algebra; quantum theory
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Funding
- Polish Ministry of Science and Higher Education [N519 012]
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We provide a bound for the trace distance between two quantum states. The lower bound is based on the superfidelity, which provides the upper bound on quantum fidelity. One of the advantages of the presented bound is that it can be estimated using a simple measurement procedure. We also compare this bound with the one provided in terms of fidelity.
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