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| visits | member for | 9 months |
| seen | Sep 18 '12 at 17:20 | |
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Aug 21 |
comment |
Efficiently distinguishing mixed quantum states? Given two states is straight forward to figure out how well to distinguish them (trace norm distance), but yeah, I'm lost on efficency. I cannot really make many copies, as it is one specific state I'm given, that I want to check. Maybe being concrete will help my question, I want to make sure that I have the following state (or something very close): \rho = \sum_{r_0,r_1 \in {0,1}^n} |\psi_{r_0,r_1}> <\psi_{r_0,r_1}| where |\psi_{r_0,r_1}> = |(|0>|r_0> + |1>|r_1>) I know how to create this mixed state, but how do I, efficiently check it? |
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Aug 21 |
awarded | Student |
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Aug 20 |
asked | Efficiently distinguishing mixed quantum states? |
