On the Schwinger limit attainability with extreme power lasers
On the Schwinger limit attainability with extreme power lasers
On the Schwinger limit attainability with extreme power lasers
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In <strong>the</strong> case of time - dependent field :<br />
2 2mc<br />
e<br />
Here K <strong>with</strong> K0<br />
<br />
K e<br />
<br />
0<br />
Nonadiabatic Pair Production<br />
2<br />
p|| p <br />
<br />
W <br />
exp g K b1Kb2K ee <br />
<br />
mecmec <br />
e <br />
<br />
In adiabatic regime (tunneling), 1, <br />
8 2 4<br />
2 2 2<br />
K K K<br />
K g K 1 , b1K, b2K1<br />
4<br />
In nonadiabatic<br />
regime (multiphoton), K 1, g K <br />
K<br />
1 <br />
<br />
1ln 0.386 ,<br />
2 K <br />
8<br />
K <br />
<br />
2<br />
b1K <br />
ln K<br />
2<br />
0.386 , b2K<br />
<br />
ln K 1.39<br />
K K<br />
5/ 2<br />
<br />
4 2K0<br />
1 mc e <br />
4<br />
K <br />
The probability W <br />
w<br />
ee n 3/ 2 3 2 V. S. Popov, “Tunnel and multiphoton<br />
nK 2 c m 0<br />
ec<br />
e ionization of atoms and ions in an intense<br />
laser field (Keldysh <strong>the</strong>ory)”<br />
Phys.-Usp. 47 855 (2004)
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