Dynamical view of pair creation in uniform electric and magnetic fields

Tanji, Naoto

doi:10.1016/j.aop.2009.03.012

Cited by 127 publications

(252 citation statements)

References 66 publications

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“…2 Also, in what follows, we take into account neither the collision between the created particles nor their inherent radiation fields. Previous investigations on these subjects have revealed that the effects induced by both phenomena are irrelevant for the PP whenever the field strength E is weaker than the critical one E c [43][44][45] and this is in fact the regime in which we are interested.…”

Section: Quantum Kinetic Approachmentioning

confidence: 97%

Electron-positron pair production in a bifrequent oscillating electric field

2014

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The production of electron-positron pairs from the quantum vacuum polarized by the superposition of a strong and a perturbative oscillating electric field mode is studied. Our outcomes rely on a nonequilibrium quantum field theoretical approach, described by the quantum kinetic BoltzmannVlasov equation. By superimposing the perturbative mode, the characteristic resonant effects and Rabi-like frequencies in the single-particle distribution function are modified, as compared to the predictions resulting from the case driven by a strong oscillating field mode only. This is demonstrated in the momentum spectra of the produced pairs. Moreover, the dependence of the total number of pairs on the intensity parameter of each mode is discussed and a strong enhancement found for large values of the relative Keldysh parameter.

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Section: Quantum Kinetic Approachmentioning

confidence: 97%

Electron-positron pair production in a bifrequent oscillating electric field

2014

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“…We choose 14) where the coefficient is chosen in order to satisfy the normalization condition (2.11). For future reference, we give a useful integral representation of the parabolic cylinder functions,…”

Section: The In-vacuum and The Bogoliubov Coefficientsmentioning

confidence: 99%

“…This quantum state has been extensively discussed in the literature (see, e.g., [10][11][12][13][14] and references therein), but to our knowledge its invariance properties have not yet been studied. We show by a direct calculation that the in-vacuum state is Lorentz invariant.…”

Section: Introductionmentioning

confidence: 99%

Observer dependence of bubble nucleation and Schwinger pair production

Garriga

Kanno

Sasaki

et al. 2012

J. Cosmol. Astropart. Phys.

129

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Pair production in a constant electric field is closely analogous to bubble nucleation in a false vacuum. The classical trajectories of the pairs are Lorentz invariant, but it appears that this invariance should be broken by the nucleation process. Here, we use a model detector, consisting of other particles interacting with the pairs, to investigate how pair production is seen by different Lorentzian observers. We focus on the idealized situation where a constant external electric field is present for an infinitely long time, and we consider the in-vacuum state for a charged scalar field that describes the nucleating pairs. The in-vacuum is defined in terms of modes which are positive frequency in the remote past. Even though the construction uses a particular reference frame and a gauge where the vector potential is time dependent, we show explicitly that the resulting quantum state is Lorentz invariant. We then introduce a "detector" particle which interacts with the nucleated pairs, and show that all Lorentzian observers will see the particles and antiparticles nucleating preferentially at rest in the detector's rest frame. Similar conclusions are expected to apply to bubble nucleation in a sufficiently long lived vacuum. We also comment on certain unphysical aspects of the Lorentz invariant in-vacuum, associated with the fact that it contains an infinite density of particles. This can be easily remedied by considering Lorentz breaking initial conditions.

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“…Our production mechanism of gluons and monopoles is Schwinger mechanism, that is, they are generated as pair production [13,14] under the background color electric and magnetic fields. We assume that the background gauge fields are spatially homogeneous and are pointed into the identical directions, both in real and color spaces.…”

Section: Applicability Of Schwinger Mechanismmentioning

confidence: 99%

“…There are some reliable methods with which the decays of the strong gauge fields can be analyzed. They are classical statistical field theories [10][11][12], Schwinger mechanism [13,14] or classical numerical simulations [15][16][17][18] in gauge theories of quarks and gluons. But there are no reliable methods with which the decays of the weak gauge fields can be analyzed since α s is large.…”

Section: Introductionmentioning

confidence: 99%

Production of semi-quark-gluon-monopole plasma by glasma decay

Iwazaki

2016

Phys. Rev. C

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Using the standard Lagrangian of gluons and a model of dual superconductor for magnetic monopoles, we calculate the number densities of the gluons and monopoles produced by the decay of background color electric E and magnetic B fields ( glasma ). We find that gluons are dominant decay products when the initial values of the gauge fields are large such that gE = gB > (0.5GeV) 2 , while they are suppressed and monopoles are dominant decay products when the initial values are small such that gE = gB < (0.4GeV)2 . The feature of the gluon dominance at large gE = gB and the monopole dominance at small gE = gB is similar to the one of thermalized quark gluon monopole plasmas proposed recently, if we identify √ gE = √ gB as temperatures of the plasmas. The identification is suggested by the fact that the energy densities of the gluons and monopoles are proportional to the initial values (gB) 2 = (gE) 2 , while the energy densities of the plasmas are proportional to T 4 . The feature of the gluon dominance in the glasmas with large saturation momenta has been derived in classical statistical field theories, while the feature of the monopole dominance has not yet derived. Although the model of the monopoles is phenomenological, our analysis suggests that the monopoles play important roles in the decay of the glasmas with small saturation momenta, to which classical statistical field theories are not applicable.

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Dynamical view of pair creation in uniform electric and magnetic fields

Cited by 127 publications

References 66 publications

Electron-positron pair production in a bifrequent oscillating electric field

Electron-positron pair production in a bifrequent oscillating electric field

Observer dependence of bubble nucleation and Schwinger pair production

Production of semi-quark-gluon-monopole plasma by glasma decay

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