A sharp continuity estimate for the von Neumann entropy
A sharp continuity estimate for the von Neumann entropy
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DOI:
10.1088/1751-8113/40/28/s18
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发表时间:
2007-07-13
影响因子:
2.1
通讯作者:
Audenaert, Koenraad M. R.
中科院分区:
文献类型:
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作者:
Audenaert, Koenraad M. R.
We derive an inequality relating the entropy difference between two quantum states to their trace norm distance, sharpening a well-known inequality due to Fannes. In our inequality, equality can be attained for every prescribed value of the trace norm distance.