Relativistic nonperturbative above-threshold phenomena in strong laser fields

Müller, Carsten; Hatsagortsyan, Karen Z.; Ruf, Matthias; Müller, S.; Hetzheim, H.; Kohler, Markus C.; Keitel, Christoph H.

doi:10.1134/s1054660x09150316

Cited by 24 publications

(19 citation statements)

References 61 publications

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“…However, contrary to strong-field ionization in the nonrelativistic regime, in the case of pair creation, electrons are predominantly created at polar angles θ e − close to π , which is in the direction of the laser field propagation. The same has been observed for relativistic ionization [41,42] and has been realized to be a general feature of nonperturbative multiphoton phenomena that involves ultrastrong laser fields. As was stated in Refs.…”

Section: Relative Phase Effectssupporting

confidence: 68%

Phase effects in laser-induced electron-positron pair creation

Krajewska

Kamiński

2012

Phys. Rev. A

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Probability rates of electron-positron pair creation in collisions of a relativistic nucleus with a two-color laser field are calculated using the S-matrix approach. The case when both components of the laser field have commensurate frequencies and comparable strengths is considered. Pronounced interference effects are observed in angular distributions of created particles as well as in the total probability rates of pair production. These interference effects show a significant phase dependence of the pair-creation process.

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Section: Relative Phase Effectssupporting

confidence: 68%

Phase effects in laser-induced electron-positron pair creation

Krajewska

Kamiński

2012

Phys. Rev. A

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“…Equation (2) may be thought of as a model of the electric field in an antinode of a standing-wave mode ignoring spatial inhomogeneities. A more realistic modeling would require including also possible magnetic components, along the lines of [32,34] as well as variations in space and time [34,35]. The corresponding vector potential reads…”

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confidence: 99%

Effective Mass Signatures in Multiphoton Pair Production

2014

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Electron-positron pair production in oscillating electric fields is investigated in the nonperturbative threshold regime. Accurate numerical solutions of quantum kinetic theory for corresponding observables are presented and analyzed in terms of a proposed model for an effective mass of electrons and positrons acquired within the given strong electric field. Although this effective mass cannot provide an exact description of the collective interaction of a charged particle with the strong field, physical observables are identified which carry direct and sensitive signatures of the effective mass.

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“…Unfortunately, any attempt at verifying this understanding in macroscopic electric fields is hampered by the exponentially small production rate ∼ exp[−πm 2 /(eE)], where m is the electron mass being huge for typical laboratory field strengths E [1][2][3]. The rapid development of optical or X-ray high-intensity lasers has lead to many suggestions for schemes for a first discovery [4][5][6][7][8][9][10][11][12][13][14], also including the combination of lasers and strong Coulomb fields [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Pair production in rotating electric fields

Blinne

Gies

2014

Phys. Rev. D

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We explore Schwinger pair production in rotating time-dependent electric fields using the real-time DHW formalism. We determine the time evolution of the Wigner function as well as asymptotic particle distributions neglecting back-reactions on the electric field. Whereas qualitative features can be understood in terms of effective Keldysh parameters, the field rotation leaves characteristic imprints in the momentum distribution that can be interpreted in terms of interference and multiphoton effects. These phenomena may seed characteristic features of QED cascades created in the antinodes of a high-intensity standing wave laser field.

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Relativistic nonperturbative above-threshold phenomena in strong laser fields

Cited by 24 publications

References 61 publications

Phase effects in laser-induced electron-positron pair creation

Phase effects in laser-induced electron-positron pair creation

Effective Mass Signatures in Multiphoton Pair Production

Pair production in rotating electric fields

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