Realization of a Laughlin quasiparticle interferometer: Observation of fractional statistics

By F. Camino, Wei ZhouV. J. Goldman. 2005

167 citations recorded by the source corpus.

In two dimensions, the laws of physics permit existence of anyons, particles with fractional statistics which is neither Fermi nor Bose. That is, upon exchange of two such particles, the quantum state of a system acquires a phase which is neither 0 nor \pi, but can be any value. The elementary excitations (Laughlin quasiparticles) of a fractional quantum Hall fluid have fractional electric charge and are expected to obey fractional statistics. Here we report experimental realization of a novel Laughlin quasiparticle interferometer, where quasiparticles of the 1/3 fluid execute a closed path around an island of the 2/5 fluid and thus acquire statistical phase. Interference fringes are observed as conductance oscillations as a function of magnetic flux, similar to the Aharonov-Bohm effect. We observe the interference shift by one fringe upon introduction of five magnetic flux quanta (5h/e) into the island. The corresponding 2e charge period is confirmed directly in calibrated gate experiments. These results constitute direct observation of fractional statistics of Laughlin quasiparticles.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/5df20e78d34dcf842105566b8794a3dd18a41ebf

How researchers see this paper

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In Artificial Intelligence

1. C. Nayak
2. Parsa Bonderson
3. A. Stern
4. Steven H. Simon
5. Michael H. Freedman
6. Michael Mueger

In Atomic and Molecular Physics, and Optics

1. A. Stern
2. Parsa Bonderson
3. C. Nayak
4. Michael H. Freedman
5. Steven H. Simon
6. C. Beenakker
7. J. Alicea
8. Ashvin Vishwanath

In Condensed Matter Physics

1. Parsa Bonderson
2. Steven H. Simon
3. Michael H. Freedman
4. C. Nayak
5. A. Stern
6. S. Sachdev

Citations in the corpus

• Non-Abelian Anyons and Topological Quantum Computation (2007, background): “Consequently, we will devote a considerable part of our discussion to putative non-Abelian quantum Hall systems which are also of great interest in their own right.”
• Non-Abelian Anyons and Interferometry (2007, background): “Recently, a series of experiments purported to verify the fractional braiding statistics has been reported [41, 42, 43, 44, 45, 46].”