Symmetries and conservation laws in non-Hermitian field theories
Symmetries and conservation laws in non-Hermitian field theories
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非厄米场论中的对称性和守恒定律
DOI:
10.1103/physrevd.96.065027
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发表时间:
2017
影响因子:
5
通讯作者:
Alexandre J
中科院分区:
文献类型:
--
作者:
Alexandre J
Anti-Hermitian mass terms are considered, in addition to Hermitian ones, for-symmetric complex-scalar and fermionic field theories. In both cases, the Lagrangian can be written in a manifestly symmetric form in terms of the-conjugate variables, allowing for an unambiguous definition of the equations of motion. After discussing the resulting constraints on the consistency of the variational procedure, we show that the invariance of a non-Hermitian Lagrangian under a continuous symmetry transformation does not imply the existence of a corresponding conserved current. Conserved currents exist, but these are associated with transformations under which the Lagrangian is not invariant and which reflect the well-known interpretation of-symmetric theories in terms of systems with gain and loss. A formal understanding of this unusual feature of non-Hermitian theories requires a careful treatment of Noether’s theorem, and we give specific examples for illustration.
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DOI:
10.1088/1751-8113/49/45/45lt01
发表时间:
2015
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
C. Bender;Daniel W. Hook;N. Mavromatos;S. Sarkar
通讯作者:
S. Sarkar
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
C. Bender;V. Branchina;Emanuele Messina
通讯作者:
Emanuele Messina
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
C. Bender;V. Branchina;Emanuele Messina
通讯作者:
Emanuele Messina
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
C. Bender;V. Branchina
通讯作者:
V. Branchina