Estimating expectation values using approximate quantum states
We introduce an approximate description of an $N$-qubit state, which contains sufficient information to estimate the expectation value of any observable to a precision that is upper bounded by the ratio of a suitably-defined seminorm of the observable to the square root of the number of the system&#...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2021-03-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2021-03-16-413/pdf/ |