Answers are grounded in this paper and cite their sources.
The spontaneous generation of parity- (P) and time-reversal- (T) violating masses in (2+1)-dimensional QED is studied in the large-N limit, where N is the number of two-component complex fermions. Energy considerations of various symmetry-breaking patterns indicate that P and T are not spontaneously broken, even though masses which individually violate these symmetries are dynamically generated.
No takes yet. Share an insight, caveat, or question.
Appelquist et al. (1986) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: