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	Author	Albandea, D.; Catumba, G.; Ramos, A.
	Title	Strong CP problem in the quantum rotor			Type	Journal Article
	Year	2024	Publication	Physical Review D	Abbreviated Journal	Phys. Rev. D
	Volume	110	Issue	9	Pages	094512 - 11pp
	Keywords
	Abstract	Recent studies have claimed that the strong CP problem does not occur in QCD, proposing a new order of limits in volume and topological sectors when studying observables on the lattice. In order to shed light on this issue, we study the effect of the topological theta-term on a simple quantum mechanical rotor that allows a lattice description. The topological susceptibility and the theta-dependence of the energy spectrum are both computed using local lattice correlation functions. The sign problem is overcome by considering Taylor expansions in theta, exploiting automatic differentiation methods for Monte Carlo processes. Our findings confirm the conventional wisdom on the strong CP problem.
	Address	[Albandea, D.; Catumba, G.; Ramos, A.] Inst Fis Corpuscular CSIC UVEG, Edificio Inst Invest,Apartado Correos 22085, E-46071 Valencia, Spain, Email: david.albandea@uv.es;
	Corporate Author				Thesis
	Publisher	Amer Physical Soc	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2470-0010	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:001365499800001			Approved	no
	Is ISI	yes	International Collaboration	no
	Call Number	IFIC @ pastor @			Serial	6350
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