Quantum theory restricts our ability to determine the state of a physical system. This is true even if we know for certain that it was prepared in one of a known set of possible states. I describe two types of optimal strategy for state discrimination. These are (i) state discrimination with minimum
Multicopy quantum state discrimination
โ Scribed by WenHai Zhang; LongBao Yu; Ming Yang; ZhuoLiang Cao
- Book ID
- 107364127
- Publisher
- Science in China Press (SCP)
- Year
- 2011
- Tongue
- English
- Weight
- 448 KB
- Volume
- 55
- Category
- Article
- ISSN
- 1672-1799
No coin nor oath required. For personal study only.
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## Abstract Unambiguous discrimination among nonorthogonal but linearly independent quantum states is possible with a certain probability of success. Here, we consider a new variant of that problem. Instead of discriminating among all of the __N__ different states, we now ask for less. We want to u
We derive the general discrimination of quantum states chosen from a certain set, given an initial M copies of each state, and obtain the matrix inequality which describes the bound between the maximum probability of correctly determining and that of error. The former works are special cases of our