All unital qubit channels are 4-noisy operations
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- All unital qubit channels are 4-noisy operations
Accepted author manuscript, 125 KB, PDF document
We show that any unital qubit channel can be implemented by letting the input system interact unitarily with a four-dimensional environment in the maximally mixed state and then tracing out the environment. We also provide an example where the dimension of such an environment has to be at least 3.
Original language | English |
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Journal | Letters in Mathematical Physics |
Volume | 109 |
Issue number | 1 |
Pages (from-to) | 1-9 |
ISSN | 0377-9017 |
DOIs | |
Publication status | Published - 2019 |
- Factorizable maps, Noisy operations, Open quantum systems, Operator Schmidt rank, Quantum channels
Research areas
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ID: 198652987