Manifestation of the Berry connection in chiral lattice systems
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866908420306632704 |
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| author | Di Colandrea, Francesco Dehghan, Nazanin Cardano, Filippo D'Errico, Alessio Karimi, Ebrahim |
| author_facet | Di Colandrea, Francesco Dehghan, Nazanin Cardano, Filippo D'Errico, Alessio Karimi, Ebrahim |
| contents | The Aharonov-Bohm effect is a physical phenomenon where the vector potential induces a phase shift of electron wavepackets in regions with zero magnetic fields. It is often referred to as evidence for the physical reality of the vector potential. A similar effect can be observed in solid-state systems, where the Berry connection can influence electron dynamics. Here, we show that in chiral-symmetric processes the Berry connection determines an observable effect on the mean chiral displacement of delocalized wavefunctions. This finding is supported by a photonic experiment realizing a topological quantum walk, and demonstrates a new effect that can be attributed directly to the presence of a gauge field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_07946 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Manifestation of the Berry connection in chiral lattice systems Di Colandrea, Francesco Dehghan, Nazanin Cardano, Filippo D'Errico, Alessio Karimi, Ebrahim Mesoscale and Nanoscale Physics Optics Quantum Physics The Aharonov-Bohm effect is a physical phenomenon where the vector potential induces a phase shift of electron wavepackets in regions with zero magnetic fields. It is often referred to as evidence for the physical reality of the vector potential. A similar effect can be observed in solid-state systems, where the Berry connection can influence electron dynamics. Here, we show that in chiral-symmetric processes the Berry connection determines an observable effect on the mean chiral displacement of delocalized wavefunctions. This finding is supported by a photonic experiment realizing a topological quantum walk, and demonstrates a new effect that can be attributed directly to the presence of a gauge field. |
| title | Manifestation of the Berry connection in chiral lattice systems |
| topic | Mesoscale and Nanoscale Physics Optics Quantum Physics |
| url | https://arxiv.org/abs/2401.07946 |