3 papers
hep-ph2025
Lorentz violation and momentum-space geometric phases
Alan Kostelecky, Ralf Lehnert, Marco Schreck +1
Geometric phases can manifest when a relativistic quantum particle moves cyclically along a loop in parameter space. The phase can be affected by the presence of a background field…
hep-th2024
Nonperturbative Lorentz Violation and Field Quantization
Alan Kostelecky, Ralf Lehnert, Marco Schreck +1
Regimes of Lorentz-violating effective field theories are studied in which departures from Lorentz symmetry are nonperturbative. Within a free toy theory exhibiting Lorentz breakdo…
hep-ph2024
Physical interpretation of large Lorentz violation via Weyl semimetals
Alan Kostelecky, Ralf Lehnert, Marco Schreck +1
The physical intepretation of effective field theories of fundamental interactions incorporating large Lorentz violation is a long-standing challenge, known as the concordance prob…