Role of vacuum polarization for the annihilation channel in a strong laser field

Smolyansky, S. A.; Blaschke, D.; Chertilin, A. V.; Roepke, G.; Тараканов, А. В.

doi:10.48550/arxiv.1012.0559

Cited by 6 publications

(10 citation statements)

References 8 publications

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“…This is in contrast to the case γ ≫ 1, where accounting for multiphoton processes in the phase (44) leads to a constant component[45].…”

mentioning

confidence: 73%

“…The value f (0) can be estimated as a result of the numerical solution of the KE ( 16), ( 17) for e − e + excitations in a laser field [45]. For the PW laser system Astra Gemini we have E 0 ∼ 10 −5 E c , λ = 800 nm and f2 (0) ∼ 10 −11 [20,30].…”

Section: B Multiphoton Domain (γ ≫ 1)mentioning

confidence: 99%

“…In this case the mismatch (61) can be compensated by the smallness of the photon number from the quasiclassical laser field, n 0 1 [45]. Let n 0 = 1 (this is the hypothetical limiting case, e.g., for the planned XFEL facility with λ = 0.15 nm [14]).…”

Section: The Case Of γ-Ray Vacuum Excitation (ν ∼ M)mentioning

confidence: 99%

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BBGKY kinetic approach for ane−e+γplasma created from the vacuum in a strong laser-generated electric field: The one-photon annihilation channel

et al. 2011

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In the present work a closed system of kinetic equations is obtained from the truncation of the BBGKY hierarchy for the description of the vacuum creation of an electron -positron plasma and secondary photons due to a strong laser field. This truncation is performed in the Markovian approximation for the one-photon annihilation channel which is accessible due to the presence of the strong external field. Estimates of the photon production rate are obtained for different domains of laser field parameters (frequency ν and field strength E). A huge quantity of optical photons of the quasiclassical laser field is necessary to satisfy the conservation laws of the energy and momentum of the constituents (e − , e + and γ) in this channel. Since the number of these optical photons corresponds to the order of perturbation theory, a vanishingly small photon production rate results for the optical region and strongly subcritical fields E ≪ Ec. In the γ-ray region ν m the required number of laser photons is small and the production rate of photons from the one-photon annihilation process becomes accessible to observations for subcritical fields E Ec. In the infrared region the photon distribution has a 1/k spectrum typical for flicker noise. PACS numbers: 42.55.Vc, 41.60.Cr, I.

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“…This is in contrast to the case γ ≫ 1, where accounting for multiphoton processes in the phase (44) leads to a constant component[45].…”

mentioning

confidence: 73%

Section: B Multiphoton Domain (γ ≫ 1)mentioning

confidence: 99%

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BBGKY kinetic approach for ane−e+γplasma created from the vacuum in a strong laser-generated electric field: The one-photon annihilation channel

et al. 2011

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“…In the works [10,11] it was shown that the spectrum of the secondary photons in the low frequency domain k ≪ m has the character of the flicker noise. In the work [13] the inclusion of vacuum polarization effects in the one-photon radiation spectrum led to an essential change of the photon KE which was investigated in a broad spectral band including the annihilation domain ν ∼ 2m. First we have considered the domain of large adiabaticity parameters γ ≫ 1, where the photon radiation from the focal spot turns out to be very small.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Photon Radiation off an e^–e⁺‐Plasma Created from the Vacuum in a Strong Laser Field

Blaschke

Röpke

Schmidt

et al. 2011

Contrib. Plasma Phys.

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We consider the one-photon annihilation mechanism in a electron -positron quasiparticle plasma (EPP) created from the vacuum in a strong subcritical laser field due to the dynamical Schwinger mechanism. On the basis of a kinetic theory approach we show that the secondary photons have a radiation spectrum proportional to 1/k (flicker noise). This effect is very small for EPP excitations in the optical spectrum but can reach quite observable values in the γ -ray region.

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“…This is then investigated for a variety of realistic optical and XFEL beam parameters. For related recent investigations see [10,11].…”

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confidence: 99%

Pair annihilation in laser pulses: Optical versus x-ray free-electron laser regimes

2011

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We discuss the theory and phenomenology of pair annihilation, within an ultrashort laser pulse, to a single photon. The signature of this process is the unidirectional emission of single photons with a fixed energy. We show that the cross section is significantly larger than for two-photon pair annihilation in vacuum, with x-ray free-electron laser parameters admitting a much clearer signal than optical beams.

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Role of vacuum polarization for the annihilation channel in a strong laser field

Cited by 6 publications

References 8 publications

BBGKY kinetic approach for ane−e+γplasma created from the vacuum in a strong laser-generated electric field: The one-photon annihilation channel

BBGKY kinetic approach for ane−e+γplasma created from the vacuum in a strong laser-generated electric field: The one-photon annihilation channel

Kinetics of Photon Radiation off an e^–e⁺‐Plasma Created from the Vacuum in a Strong Laser Field

Pair annihilation in laser pulses: Optical versus x-ray free-electron laser regimes

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Role of vacuum polarization for the annihilation channel in a strong laser field

Cited by 6 publications

References 8 publications

BBGKY kinetic approach for ane−e+γplasma created from the vacuum in a strong laser-generated electric field: The one-photon annihilation channel

BBGKY kinetic approach for ane−e+γplasma created from the vacuum in a strong laser-generated electric field: The one-photon annihilation channel

Kinetics of Photon Radiation off an e–e+‐Plasma Created from the Vacuum in a Strong Laser Field

Pair annihilation in laser pulses: Optical versus x-ray free-electron laser regimes

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Kinetics of Photon Radiation off an e^–e⁺‐Plasma Created from the Vacuum in a Strong Laser Field