Two-local qubit Hamiltonians: when are they stoquastic?
We examine the problem of determining if a 2-local Hamiltonian is stoquastic by local basis changes. We analyze this problem for two-qubit Hamiltonians, presenting some basic tools and giving a concrete example where using unitaries beyond Clifford rotations is required in order to decide stoquastic...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2019-05-01
|
| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2019-05-06-139/pdf/ |