3 papers
hep-th2026
Compact space catalysis of false vacuum decay and Schwinger effect
Saquib Hassan, John March-Russell
We study zero-temperature false vacuum decay in compact spatial dimensions and show that for volumes below a critical value a new bounce solution, different from Coleman's cele…
hep-th2025
De Sitter space constraints on brane tensions and couplings
Saquib Hassan, Georges Obied, John March-Russell
We argue for the existence of bounds on the tensions of -branes in de Sitter space in terms of the Hubble rate and the strength of a class of Chern-Simons-like couplings. The wo…
hep-ph2024
Chern-Simons Induced Thermal Friction on Axion Domain Walls
Saquib Hassan, Gaurang Ramakant Kane, John March-Russell +1
We study the dynamics and interactions of the solitonic domain walls that occur in realistic axion electrodynamics models including the Chern-Simons interaction, $aε_{μνλÏ}F^{…