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Artificial gauge field switching using orbital angular momentum modes in optical waveguides
Christina Jörg1, Gerard Queraltó2, Mark Kremer3
1Physics Department and Research Center OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
Light, Science & Applications
|September 9, 2020
Summary
Researchers created artificial gauge fields in photonic lattices by altering light beam topological charge. This breakthrough enables dynamic control for advanced quantum simulations without geometric changes.
Area of Science:
- Quantum simulation
- Photonics
- Condensed matter physics
Background:
- Artificial gauge fields are crucial for quantum simulation, controlling uncharged particles.
- Existing methods often require geometric modifications or external fields, limiting flexibility.
Purpose of the Study:
- To demonstrate a novel method for generating artificial gauge fields in photonic lattices.
- To enable dynamic control of quantum phenomena in optical systems.
Main Methods:
- Experimentally generating artificial gauge fields by modifying the topological charge of a light beam.
- Utilizing a waveguide lattice with a diamond chain configuration.
- Observing the Aharonov-Bohm caging effect to confirm the presence of an effective magnetic flux.
Main Results:
- An effective magnetic flux was naturally generated by injecting a light beam with orbital angular momentum into the lattice.
- The Aharonov-Bohm caging effect was successfully measured, confirming the artificial magnetic flux.
- Artificial gauge fields were switched on and off by simply changing the topological charge of the input light.
Conclusions:
- This technique allows for the dynamic control of artificial gauge fields in photonic systems.
- It bypasses the need for structural modifications or external fields, simplifying experimental setups.
- This advancement is significant for optical quantum simulation, enabling access to diverse topological regimes within a single structure.
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