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Experimental band structure spectroscopy along a synthetic dimension
Avik Dutt1, Momchil Minkov1, Qian Lin2
1Ginzton Laboratory and Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA.
Nature Communications
|July 18, 2019
Summary
We experimentally measured the band structure in synthetic dimensions by modulating a resonator. This method allows flexible engineering of complex lattice properties for novel quantum systems.
Area of Science:
- Quantum physics
- Condensed matter physics
- Photonics
Background:
- Synthetic dimensions enable higher-dimensional lattice construction in lower-dimensional systems.
- Band structure is crucial for theoretical descriptions of synthetic dimension systems.
Purpose of the Study:
- To experimentally measure the band structure along a synthetic dimension.
- To demonstrate a flexible platform for engineering synthetic lattice properties.
Main Methods:
- Dynamically modulating a resonator at frequencies related to its mode spacing.
- Creating a periodically driven lattice of coupled modes in the frequency dimension.
- Utilizing time-resolved transmission measurements for band structure readout.
Main Results:
- Direct experimental measurement of the band structure along the synthetic dimension.
- Demonstration of tunable coupling strength and range via modulation parameters.
- Realization of long-range coupling, gauge potentials, and nonreciprocal bands through additional frequency drives.
Conclusions:
- Time-resolved transmission provides a direct readout of synthetic band structures.
- The proposed system offers high flexibility for band structure engineering.
- Enables the creation of novel quantum phenomena in engineered lattices.
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