This book is a brief introduction to negative quantum channels, i.e., linear, trace-preserving (and consistent) quantum maps that are not completely positive. The flat and sharp operators are introduced and explained. Complete positivity is presented as a mathematical property, but it is argued that complete positivity is not a physical requirement of all quantum operations. Negativity, a measure of the lack of complete positivity, is proposed as a tool for empirically testing complete positivity assumptions.
- ISBN10 1627051856
- ISBN13 9781627051859
- Publish Date 1 June 2014
- Publish Status Active
- Imprint Morgan & Claypool
- Format eBook
- Pages 187
- Language English