Finite temperature Schwinger pair production in coexistent electric and magnetic fields

Korwar, Mrunal; Thalapillil, Arun M.

doi:10.1103/physrevd.98.076016

Cited by 17 publications

(24 citation statements)

References 77 publications

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“…Thus, a more relevant quantification of the MMM production rate, at least in the initial phases of the neutron star's life, should try to incorporate the effects of this finite temperature. As mentioned earlier, there has been tremendous progress recently in computing Schwinger pair-production rates at finite temperature, both for electrically charged as well as for strongly-coupled magnetic monopoles [49,90,[92][93][94][95][96][97][98][99][100][101][102]. There is currently some disagreement on the exact functional form of the worldline instanton (see for instance discussions in [49,90,[98][99][100][101][102]).…”

Section: Figurementioning

confidence: 99%

“…As mentioned earlier, there has been tremendous progress recently in computing Schwinger pair-production rates at finite temperature, both for electrically charged as well as for strongly-coupled magnetic monopoles [49,90,[92][93][94][95][96][97][98][99][100][101][102]. There is currently some disagreement on the exact functional form of the worldline instanton (see for instance discussions in [49,90,[98][99][100][101][102]). Nevertheless, there seem to be a few generic predictions-an exponential enhancement in the pair-production rate relative to zero temperature rates, and a critical temperature below which the thermal enhancements switch off [49,90,94,95,98,99,101].…”

Section: Figurementioning

confidence: 99%

“…There is currently some disagreement on the exact functional form of the worldline instanton (see for instance discussions in [49,90,[98][99][100][101][102]). Nevertheless, there seem to be a few generic predictions-an exponential enhancement in the pair-production rate relative to zero temperature rates, and a critical temperature below which the thermal enhancements switch off [49,90,94,95,98,99,101].…”

Section: Figurementioning

confidence: 99%

“…The critical temperature (T C ) is a function of the magnetic field, monopole mass and magnetic charge [49,90,94,95,98,99,101]…”

Section: Figurementioning

confidence: 99%

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Continuous gravitational waves and magnetic monopole signatures from single neutron stars

2020

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Future observations of continuous gravitational waves from single neutron stars, apart from their monumental astrophysical significance, could also shed light on fundamental physics and exotic particle states. One such avenue is based on the fact that magnetic fields cause deformations of a neutron star, which results in a magnetic-field-induced quadrupole ellipticity. If the magnetic and rotation axes are different, this quadrupole ellipticity may generate continuous gravitational waves which may last decades, and may be observable in current or future detectors. Light, milli-magnetic monopoles, if they exist, could be pair-produced non-perturbatively in the extreme magnetic fields of neutron stars, such as magnetars. This non-perturbative production furnishes a new, direct dissipative mechanism for the neutron star magnetic fields. Through their consequent effect on the magnetic-fieldinduced quadrupole ellipticity, they may then potentially leave imprints in the early stage continuous gravitational wave emissions. We speculate on this possibility in the present study, by considering some of the relevant physics and taking a very simplified toy model of a magnetar as the prototypical system. Preliminary indications are that new-born millisecond magnetars could be promising candidates to look for such imprints. Deviations from conventional evolution, and comparatively abrupt features in the early stage gravitational waveforms, distinct from other astrophysical contributions, could be distinguishable signatures for these exotic monopole states.

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

“…The critical temperature (T C ) is a function of the magnetic field, monopole mass and magnetic charge [49,90,94,95,98,99,101]…”

Section: Figurementioning

confidence: 99%

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Continuous gravitational waves and magnetic monopole signatures from single neutron stars

2020

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“…Early discussion [14][15][16] combined with Schwinger's approach proved that there is no thermal contribution to imaginary part of an effective one-loop action. But recent papers using worldline instants technique, where charged particles absorb thermal photons to reach maximum decay at a specific temperature [5][6][7][8][9][10], prove that thermal effect enhances pair production. These also indicate that there is a temperature threshold T c = qE/2πm [7] and discrete resonant peaks T * = nqE/2πm [9] in a constant electric field E, where q and m are charge and mass.…”

Section: Introductionmentioning

confidence: 99%

Schwinger pair production correction in thermal system

Wang¹,

Sang²,

Xie³

2019

Phys. Rev. D

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In this paper, we give formal results of Schwinger pair production correction in thermal systems with external background field by using the evolution operator method of thermo field dynamics, where especially tree level correction of thermal photons is considered with linear response approaches by an effective mass shift. We consider initial systems in two types of vacuums as zero temperature and thermal vacuum, respectively, with correction of thermal photons is or not included. As an example we give results of these corrections to pair production for a constant external background electric field.

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Electric field decay without pair production: lattice, bosonization and novel worldline instantons

Kleban

2022

J. High Energ. Phys.

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Electric fields can spontaneously decay via the Schwinger effect, the nucleation of a charged particle-anti particle pair separated by a critical distance d. What happens if the available distance is smaller than d? Previous work on this question has produced contradictory results. Here, we study the quantum evolution of electric fields when the field points in a compact direction with circumference L < d using the massive Schwinger model, quantum electrodynamics in one space dimension with massive charged fermions. We uncover a new and previously unknown set of instantons that result in novel physics that disagrees with all previous estimates. In parameter regimes where the field value can be well-defined in the quantum theory, generic initial fields E are in fact stable and do not decay, while initial values that are quantized in half-integer units of the charge E = (k/2)g with k ∈ ℤ oscillate in time from +(k/2)g to −(k/2)g, with exponentially small probability of ever taking any other value. We verify our results with four distinct techniques: numerically by measuring the decay directly in Lorentzian time on the lattice, numerically using the spectrum of the Hamiltonian, numerically and semi-analytically using the bosonized description of the Schwinger model, and analytically via our instanton estimate.

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Finite temperature Schwinger pair production in coexistent electric and magnetic fields

Cited by 17 publications

References 77 publications

Continuous gravitational waves and magnetic monopole signatures from single neutron stars

Continuous gravitational waves and magnetic monopole signatures from single neutron stars

Schwinger pair production correction in thermal system

Electric field decay without pair production: lattice, bosonization and novel worldline instantons

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