NHMFL and Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.
Physics Department, Princeton University, Princeton, New Jersey 08544, USA.
Phys Rev Lett. 2019 Oct 4;123(14):146801. doi: 10.1103/PhysRevLett.123.146801.
We elucidate the nature of neutral collective excitations of fractional quantum Hall liquids in the long-wavelength limit. We demonstrate that they are chiral gravitons carrying angular momentum -2, which are quanta of quantum motion of an internal metric, and show up as resonance peaks in the system's response to what is the fractional Hall analog of gravitational waves. The relation with existing and possible future experimental work that can detect these fractional quantum Hall gravitons and reveal their chirality is discussed.
我们阐明了长波极限下分数量子霍尔液体的中性集体激发的本质。我们证明它们是带有角动量-2 的手征引力子，是内部度量量子运动的量子，并且在系统对类似于引力波的分数霍尔波的响应中表现为共振峰。讨论了与可以探测这些分数量子霍尔引力子并揭示其手征性的现有和可能的未来实验工作的关系。
