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Backreaction of Schwinger pair creation in massive QED(2)
Niels Bohr Int Acad, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark..
NORDITA SU, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden.;Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden..
Niels Bohr Int Acad, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.;Leiden Univ, Inst Lorentz Theoret Phys, NL-2333 CA Leiden, Netherlands..ORCID iD: 0000-0002-6006-6998
Univ Tokyo, Kavli Inst Phys & Math Universe WPI, UTIAS, Chiba 2778583, Japan..
2021 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 10, article id 072Article in journal (Refereed) Published
Abstract [en]

Particle-antiparticle pairs can be produced by background electric fields via the Schwinger mechanism provided they are unconfined. If, as in QED in (3+1)-d these particles are massive, the particle production rate is exponentially suppressed below a threshold field strength. Above this threshold, the energy for pair creation must come from the electric field itself which ought to eventually relax to the threshold strength. Calculating this relaxation in a self-consistent manner, however, is difficult. Chu and Vachaspati addressed this problem in the context of capacitor discharge in massless QED(2) [1] by utilizing bosonization in two-dimensions. When the bare fermions are massless, the dual bosonized theory is free and capacitor discharge can be analyzed exactly [1], however, special care is required in its interpretation given that the theory exhibits confinement. In this paper we reinterpret the findings of [1], where the capacitors Schwinger-discharge via electrically neutral dipolar meson-production, and generalize this to the case where the fermions have bare masses. Crucially, we note that when the initial charge of the capacitor is large compared to the charge of the fermions, Q >> e, the classical equation of motion for the bosonized model accurately characterizes the dynamics of discharge. For massless QED(2), we find that the discharge is suppressed below a critical plate separation that is commensurate with the length scale associated with the meson dipole moment. For massive QED(2), we find in addition, a mass threshold familiar from (3+1)-d, and show the electric field relaxes to a final steady state with a magnitude proportional to the initial charge. We discuss the wider implications of our findings and identify challenges in extending this treatment to higher dimensions.

Place, publisher, year, edition, pages
Springer Nature , 2021. no 10, article id 072
Keywords [en]
Field Theories in Lower Dimensions, Nonperturbative Effects
National Category
Subatomic Physics Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-304287DOI: 10.1007/JHEP10(2021)072ISI: 000705229500003Scopus ID: 2-s2.0-85116756780OAI: oai:DiVA.org:kth-304287DiVA, id: diva2:1607375
Note

QC 20211101

Available from: 2021-11-01 Created: 2021-11-01 Last updated: 2022-06-25Bibliographically approved

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Patil, Subodh P.
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