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Schwinger Sparks
[[Mod. note -- The referenced preprint doesn't actually report
"a first observation" of Schwinger pair production. Rather, it hypothesizes that Schwinger pair production *might* be the cause of certain observations. In describing the interpretation of the observations, the authors also state explicitly that they are discounting the possibility of strong relativistic beaming toward us; it's not clear to me why it's appropriate to discount this possibility. -- jt]] A first observation of astrophysical Schwinger Pair Production http://arxiv.org/abs/1505.06400 as theoretically predicted by Julian Schwinger J. Schwinger On Gauge Invariance and Vacuum Polarization Phys. Rev. 82 (1951) 664 in the form of coherent small 1 m^3 objects in extremely high electro magnetic fields circa a pulsar as nanosecond PeV pulses Such a mechanism may also explain other energy pulses such as fast radio bursts. Richard D Saam |
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Schwinger Sparks
On 7/2/15 3:22 PM, Richard D. Saam wrote:
[[Mod. note -- The referenced preprint doesn't actually report "a first observation" of Schwinger pair production. Rather, it hypothesizes that Schwinger pair production *might* be the cause of certain observations. In describing the interpretation of the observations, the authors also state explicitly that they are discounting the possibility of strong relativistic beaming toward us; it's not clear to me why it's appropriate to discount this possibility. -- jt]] A first observation of astrophysical Schwinger Pair Production http://arxiv.org/abs/1505.06400 as theoretically predicted by Julian Schwinger J. Schwinger On Gauge Invariance and Vacuum Polarization Phys. Rev. 82 (1951) 664 in the form of coherent small 1 m^3 objects in extremely high electro magnetic fields circa a pulsar as nanosecond PeV pulses Such a mechanism may also explain other energy pulses such as fast radio bursts. Given that Schwinger pair production *might* be the cause of certain observations and the papers generally describe a critical electric field Ec for Schwinger Pair Production http://arxiv.org/abs/hep-ph/0103185v1 Ec = me*c^3/(q*hbar)=1.3x10^18 V/m or or in terms of cgs 1.3x10^18 V/m /300 = 4.4x10^15 g^(1/2) cm^(-1/2) sec^-1 Is there a possibility that Schwinger Pair Production would have been operative at Big Bang Nucleosynthesis wherein temperature may have been 1x10^14 K ? Defining kinetic energy Boltzmann*1x10^14 = 0.014 erg (g cm^2/sec^2 and electric field energy (assume dielectric = 1) Ec^2 / 2 = (4.4x10^15)^2/2 erg/cm^3 then volume = 2*Boltzmann*1x10^14 / (4.4x10^15)^2 = (1.13x10^-11)^3 cm^3 This volume is a bit larger than an atomic nucleus at ~1x10^-14 cm. Conceivably, many moles of these volumes could be involved in BBN The corresponding Schwinger production rate is ~(e*E/hb)^2 / c = 1.3Ex10^56 #/cm^3/sec This is an extremely high number Is this type of calculation done in BBN analysis? Richard D Saam |
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