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Fractional charges and fractional spins for composite fermions in quantum electrodynamics
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作者 王永龙 卢伟涛 +2 位作者 蒋华 许长谭 潘洪哲 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第7期164-170,共7页
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 Di... 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 tile composite fermions in QBD. 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. Purthermore, 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. 展开更多
关键词 constrained Hamiltonian systems Faddeev Senjanovic path integral quantization for-malism Noether theorem
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