Fractional charges and fractional spins for composite fermions in quantum electrodynamics

doi:10.1088/1674-1056/21/7/070501

Abstract By using the Faddeev--Senjanovic path integral quantization method, we quantize the composite fermions in quantum electrodynamics (QED). In the sense of Dirac's conjecture, we deduce all the constraints and give Dirac's gauge transformations (DGT). According to that the effective action is invariant under the DGT, we obtain the Noether theorem at the quantum level, which shows the fractional charges for the composite fermions in QED. This result is better than the one deduced from the equations of motion for the statistical potentials, because this result contains both odd and even fractional numbers. Furthermore, we deduce the Noether theorem from the invariance of the effective action under the rotational transformations in 2-dimensional (x,y) plane. The result shows that the composite fermions have fractional spins and fractional statistics. These anomalous properties are given by the constraints for the statistical gauge potential.

Keywords: constrained Hamiltonian systems Faddeev--Senjanovic path integral quantization formalism Noether theorem

Received: 31 December 2011
Revised: 20 February 2012
Accepted manuscript online:

PACS:	05.30.Pr	(Fractional statistics systems)
	11.10.Ef	(Lagrangian and Hamiltonian approach)
	11.15.Yc	(Chern-Simons gauge theory)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11047020 and 11047173), the Natural Science Foundation of Shandong Province, China (Grant Nos. ZR2011AM019, ZR2010AQ025, BS2010DS006, and Y200814), and the Scientific and Technological Development Project of Shandong Province, China (Grant No. J08LI56).

Corresponding Authors: Wang Yong-Long
E-mail: wangyonglong@lyu.edu.cn

Cite this article:

Wang Yong-Long(王永龙), Lu Wei-Tao(卢伟涛), Jiang Hua(蒋华) Xu Chang-Tan(许长谭), and Pan Hong-Zhe(潘洪哲) Fractional charges and fractional spins for composite fermions in quantum electrodynamics 2012 Chin. Phys. B 21 070501

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