The Loschmidt Index
We study the nodes of the wavefunction overlap between ground states of a parameter-dependent Hamiltonian. These nodes are topological, and we can use them to analyze in a unifying way both equilibrium and dynamical quantum phase transitions in multi-band systems. We define the Loschmidt index as...
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| Format: | Article |
| Language: | English |
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SciPost
2021-05-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.10.5.100 |