Pair production in rotating electric fields

Blinne, Alexander; Gies, Holger

doi:10.1103/physrevd.89.085001

Cited by 62 publications

(92 citation statements)

References 83 publications

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“…1 are comparable to the ones chosen in [15]. In addition to the interference effects reported in that work one can also see that the spinor particle rate is increased with respect to the scalar one for particles with one spin and decreased for the others.…”

Section: Is Derived In Appendix B and Is Given In Eqs (B8)-(b14) As supporting

confidence: 67%

“…These are approximative models for the electric fields in the anti-nodes of circularly polarized standing waves. The momentum spectrum of produced electron-positron pairs for rotating fields has been recently investigated numerically for pulsed fields with the help of the real-time Dirac-Heisenberg-Wigner (DHW) formalism [15] as well as analytically for constant rotating fields with help of the semiclassical WKB approximation for spinor QED [16]. Numerical methods usually need a lot of computation time.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to this we also find interference effects in the total particle number. As was discussed in [15], the characteristic momentum spectra for rotating pulses could be a decisive fingerprint for 2 Here we again ignore discontinuities in the derivative of the potential, see footnote 1 on page 5. …”

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confidence: 99%

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Semiclassical pair production rate for rotating electric fields

Strobel

Xue

2015

Phys. Rev. D

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We semiclassically investigate Schwinger pair production for pulsed rotating electric fields depending on time. To do so we solve the Dirac equation for two-component fields in a WKB-like approximation. The result shows that for two-component fields the spin distribution of produced pairs is generally not 1 : 1. As a result the pair creation rates of spinor and scalar quantum electro dynamics (QED) are different even for one pair of turning points. For rotating electric fields the pair creation rate is dominated by particles with a specific spin depending on the sense of rotation for a certain range of pulse lengths and frequencies. We present an analytical solution for the momentum spectrum of the constant rotating field. We find interference effects not only in the momentum spectrum but also in the total particle number of rotating electric fields.PACS numbers: 12.20. Ds, 11.15.Kc, 11.15.Tk IntroductionSince the first investigations of electron-positron pair creation in strong electric fields, also known as the Schwinger effect, there has been a lot of theoretical investigations of it. However it has not yet been possible to measure it directly due to the exponentially damped pair creation rate ∼ exp(−π/ ) where = E/E c is the field strength E normalized by the critical electric field [1-3]As laser powers in future may get closer to reaching this critical field strength, investigations of the effect are of interest. However there is the possibility that different strong field processes, such as QED cascades, will set in which might prevent reaching critical intensities [4][5][6][7][8][9][10][11][12][13][14].As pointed out in [15] it might be crucial for the detection of the Schwinger effect to evaluate if one can distinguish a QED cascade triggered by an electron which was produced in the Schwinger process from one which was triggered by vacuum impurities. To do so one first has to evaluate the properties of the pairs produced via the Schwinger effect. The simplest field configurations taken into account for cascade calculations are uniformly rotating electrical fields. These are approximative models for the electric fields in the anti-nodes of circularly polarized standing waves. The momentum spectrum of produced electron-positron pairs for rotating fields has been recently investigated numerically for pulsed fields with the help of the real-time Dirac-Heisenberg-Wigner (DHW) formalism [15] as well as analytically for constant rotating fields with help of the semiclassical WKB approximation for spinor QED [16]. Numerical methods usually need a lot of computation time. Semiclassical methods can help to give a better understanding of special features of the momentum spectrum, e.g. interference effects. For one-component fields depending solely on time there exist a lot of semiclassical investigations using e.g. the WKB-approximation [17][18][19][20][21][22][23][24][25][26] or the world-line instanton method [27][28][29]. In addition to that there are exact solutions for fields depending on lightcone variabl...

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Section: Is Derived In Appendix B and Is Given In Eqs (B8)-(b14) As supporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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Semiclassical pair production rate for rotating electric fields

Strobel

Xue

2015

Phys. Rev. D

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“…However one of the advantages of the DHW formalism is that it can also solve more complex electric fields such as (1). In order to precisely obtain the momentum distribution function of created EP pairs f for the spatially homogeneous electric field (1), p-2 we adopt the trick used in [30] and the DHW formalism is reduced tȯ…”

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confidence: 99%

Nonperturbative signatures in pair production for general elliptic polarization fields

Li¹,

Lu²,

Xie³

et al. 2015

EPL

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Abstract. -The momentum signatures in nonperturbative multiphoton pair production for general elliptic polarization electric fields are investigated by employing the real-time Dirac-HeisenbergWigner formalism. For a linearly polarized electric field we find that the positions of the nodes in momenta spectra of created pairs depend only on the electric field frequency. The polarization of external fields could not only change the node structures or even make the nodes disappear but also change the thresholds of pair production. The momentum signatures associated to the node positions in which the even-number-photon pair creation process is forbid could be used to distinguish the orbital angular momentum of created pairs on the momenta spectra. These distinguishable momentum signatures could be relevant for providing the output information of created particles and also the input information of ultrashort laser pulses.Introduction. -Electron-positron (EP) pair creation in strong electric fields [1-3] is a fundamentally important exploration to probe the quantum vacuum. As a famous prediction of quantum electrodynamics, experimental observation of this nonperturbative tunneling pair production is still absent due to the fact that present available laser fields are far below the Schwinger critical electric field E cr = m 2 /e ∼ 1.32 × 10 16 V/cm, where m is the electron rest mass and −e is the electron charge (we use = c = 1). However, with the rapid development of laser technology, the stronger fields will be achieved in near future through some laser facilities [4][5][6]. This improves greatly the hopes to realize the observation of EP pair production from vacuum [7][8][9][10][11][12]. For long time two different pair production mechanisms are identified by the nonperturbative pair creation process (γ 1) and the perturbative multiphoton pair production process (γ 1), where γ = mω/eE 0 is the well known Keldysh adiabatic parameter [13], ω and E 0 are the frequency and strength

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“…As a nonperturbative prediction of quantum electrodynamics, it has not yet been observed experimentally because of the low rate ∼ exp[−πm 2 e /(eE)], where E is the electric field, m e is the mass of the electron. It has been a long pursuit in the fields of strong lasers [4] and heavy-ion collisions [5], and there have been various proposals to improve the detection [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Recently, Schwinger effect has even been generalized to particle-antiparticle pair production in the supersymmetric Yang-Mills theory [21,22].…”

Section: Introductionmentioning

confidence: 99%

Pairwise mode entanglement in Schwinger production of particle-antiparticle pairs in an electric field

Dai

Shi

2017

Phys. Rev. D

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Quantum entanglement is the characteristic quantum correlation. Here we use this concept to analyze the quantum entanglement generated by Schwinger production of particle-antiparticle pairs in an electric field, as well as the change of mode entanglement as a consequence of the electric field effect on an entangled pair of particles. The system is partitioned by using momentum modes.Various kinds of pairwise mode entanglement are calculated as functions of the electric field. Both constant and pulsed electric fields are considered. The use of entanglement exposes information beyond that in particle number distributions.

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Pair production in rotating electric fields

Cited by 62 publications

References 83 publications

Semiclassical pair production rate for rotating electric fields

Semiclassical pair production rate for rotating electric fields

Nonperturbative signatures in pair production for general elliptic polarization fields

Pairwise mode entanglement in Schwinger production of particle-antiparticle pairs in an electric field

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