Summary
A procedure for obtaining the dependence of conserved currents on the fields they generate is developed by imposing gauge invariance on a nonlocal definition of the Lagrangian. This explicit non-classical field dependence is exhibited for several interactions and shown to be sufficient to yield the necessary equality of the current-current and current-field commutators when interactions with massive fields are considered.
Riassunto
Imponendo l’invarianza di gauge su una definizione non locale della lagrangiana, si sviluppa un procedimento per ottenere la dipendenza delle correnti conservate dal campo che esse generano. Si ritrova questa esplicita dipendenza non classica dal campo in molte interazioni e si dimostra che essa è sufficiente a fornire la necessaria uguaglianza dei commutatori corrente-corrente e corrente-campo qualora si considerino le interazioni con campi massivi.
Резюме
Развивается процедура для получения зависимости сохраняющихся токов от полей, которые они образуют, посредством накладывания калибровочной инвариантности на нелокальное определение Лагранжиана. Для некоторых взаимодействий проявляется эта точная неклассическая полевая зависимость, и показывается, что этого достаточно для получения необходимого равенства для токтоковых и ток-полевых коммутаторов, когда рассматриваются взаимодействия с массивными полями.
Similar content being viewed by others
References
D. G. Boulware andS. Deser:Phys. Lett.,22, 99 (1966);Phys. Rev.,151, 1278 (1966).
T. Gatto andT. Imamura:Progr. Theor. Phys.,14, 396 (1955).
J. Schwinger:Phys. Rev. Lett.,3, 296 (1959);K. Johnson:Nucl. Phys.,25, 431 (1961);31, 464 (1962).
S. J. Chang, H. T. Nieh andT. M. Yan:Nuovo Cimento,46 A, 364 (1966);D. Boulware andL. S. Brown:Phys. Rev.,156, 1724 (1967);R. Brandt: Univ. of Maryland Tech. Report 643 (1966).
S. Okubo:Nuovo Cimento,44 A, 1015 (1966);F. Cskov andG. Pocsik:Nuovo Cimento,42 A, 413;43 A, 541 (1966).
J. S. Dowker:Nuovo Cimento,46 A, 413 (1966).
L. S. Brown:Phys. Rev.,150, 1338 (1966).
Seee.g. F. Strocchi:Phys. Rev.,162, 1429 (1967).
The equality [J k,J 0]=[J k,F 01,1] is of course an identity in the massless case sinceF 01,1 is just a dependent variable whose value isJ 0. EvaluatingJ k,F 01 using the CCR of the electromagnetic field and then taking the divergence yields an incorrect result since these CCR apply only to the transverse part ofF 01.
Similar results have been derived in the Hamiltonian formulation byD.G. Boulware:Phys. Rev.,151, 1024 (1966).
Author information
Authors and Affiliations
Additional information
Based on part of a thesis for Ph. D. requirements at Brandeis University.
Supported in part by USAF OAR, grant OSR 368-67.
Traduzione a cura della Redazione.
Перевебено ребакцией.
Rights and permissions
About this article
Cite this article
Trubatch, J. Current commutation relations for interacting fields. Nuovo Cimento A (1965-1970) 60, 239–254 (1969). https://doi.org/10.1007/BF02757346
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02757346