Microwave photons emitted by fractionally charged quasiparticles
ORAL
Abstract
Two-dimensional systems at low temperatures and high magnetic fields can host exotic particles called “anyons” that are very different from bosons and fermions. They carry a fractional charge and have fractional statistics1,2. Their fractional charge has been studied successfully using low-frequency shot noise measurement3. However, the experimental outcomes intertwined with the scattering properties of the conductor4. Here, by measuring the high-frequency noise generated by the partitioning of a continuous stream of anyons, we probe the fractional charge, independent of details of the quantum conductor. The high-frequency noise is suppressed above the cutoff frequency f related to the applied dc bias V by a Josephson type relation: f=e*V/h, where e* is the fractional charge. This provides direct evidence of fractional charge of anyons5,6.
Ref:
1. Tsui, D. C.et al., PRL. 48, 1559, 1982
2. Leinaas and J. Myrheim, Nuovo Cimento Soc. Ital. Fis.B 37, 1, 1977
3. de Picciotto, R., et al. Nature 389, 162, 1997.
4. Reznikov, M., et al. Nature 399, 238, 1999
5. Bisognin,R et al. Nature Comm, 10, 1708, 2019
6. Kapfer, M. et al. Science 363, 846, 2019
Ref:
1. Tsui, D. C.et al., PRL. 48, 1559, 1982
2. Leinaas and J. Myrheim, Nuovo Cimento Soc. Ital. Fis.B 37, 1, 1977
3. de Picciotto, R., et al. Nature 389, 162, 1997.
4. Reznikov, M., et al. Nature 399, 238, 1999
5. Bisognin,R et al. Nature Comm, 10, 1708, 2019
6. Kapfer, M. et al. Science 363, 846, 2019
*This work has been supported by ANR grants “1shot reloaded” (ANR-14-CE32-0017), and the ERC consolidator grant “EQuO” (No. 648236).
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Presenters
-
manohar Kumar
- Department of Physics, Laboratoire de Physique de l’ Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité,
- Aalto University