Laser-driven plasma pinching in e^{-}e^{+} cascade

Area of Science:

• Plasma Physics
• Quantum Electrodynamics (QED)
• High-Intensity Laser Physics

Background:

• Electron-positron plasma generation is crucial for studying extreme conditions.
• Understanding plasma dynamics in intense laser fields requires advanced simulation techniques.

Purpose of the Study:

• To investigate the cascaded production and dynamics of electron-positron plasma in intense laser fields.
• To explore the potential for triggering QED cascades and plasma pinching.
• To determine the feasibility of creating extreme conditions for fundamental physics research.

Main Methods:

• Three-dimensional particle-in-cell simulations.
• Inclusion of quantum electrodynamics (QED) processes.
• Modeling of focused laser fields with extreme intensity.

Main Results:

• Lasers exceeding 20 PW can initiate QED cascades and plasma pinching.
• Plasma self-compression leads to densities of at least 10^28 cm^-3.
• Magnetic and electric fields reach significant fractions of the Schwinger field.

Conclusions:

• The proposed setup enables the study of extreme matter and vacuum physics.
• Further quantum treatment may be necessary to fully understand the process limits.
• This research opens avenues for exploring fundamental physics under novel conditions.