Abstract
Current theories of massless free particle assume unitary space inversion and anti-unitary time reversal operators. In so doing robust classes of possible theories are discarded. In the present work theories of massless systems are derived through a strictly deductive development from the principle of relativistic invariance, so that a kind of space inversion or time reversal operator is ruled out only if it causes inconsistencies. As results, new classes of consistent theories for massless isolated systems are explicitly determined. On the other hand, the approach determines definite constraints implied by the invariance principle; they were ignored by some past investigations that, as a consequence, turn out to be not consistent with the invariance principle. Also the problem of the localizability for massless systems is reconsidered within the new theoretical framework, obtaining a generalization and a deeper detailing of previous results.
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Notes
The commutativity condition \([Q_j,Q_k]={{\textsf {I}}\hbox {O}}\) establishes the possibility of performing a measurement that yields all three values of the position coordinates. The nonexistence of commutative position operators in certain circumstances [3] prompted to search for non-commutative [20,21,22,23] or unsharp position operators (see [24] and references therein). In the present work we are interested in the commutative concept of position only.
References
Wigner, E.: On unitary representations of the inhomogeneous Lorentz group. Ann. Math. 40, 149 (1939)
Bargmann V., Wigner E.P.: Group theoretical discussion of relativistic wave equations. Proc. Natl. Acad. Sci. 34 211 (1948)
Wightman, A.S.: On the localizability of quantum mechanical systems. Rev. Mod. Phys. 34, 845 (1962)
Costa, G., Fogli, G.: Lecture Notes in Physics, vol. 823. Springer, New York (2012)
Wigner, E.P.: Group Theory and Its Application to the Quantum Mechanics of Atomic Spectra. Academic Press, Cambridge, MA (1959)
Weinberg, S.: Feynman rules for any spin II. Massless particles. Phys. Rev. 134, B882 (1964)
Weinberg, S.: The Quantum Theory of Fields, vol. I. Cambridge University Press, Cambridge (1995)
Jordan, T.F.: Simple proof of no position operator for quanta with zero mass and nonzero helicity. J. Math. Phys. 19, 1382 (1978)
Niederer, U.H., O’Raifeartaigh, L.: Realizations of the unitary representations of the inhomogeneous space-time groups. II. Covariant realizations of the Poincarè group. Fortsch. Phys. 22, 131 (1974)
Nisticò, G.: 2020: group theoretical derivation of consistent free particle theories. Found. Phys. 50, 977–1007 (2020). https://doi.org/10.1007/s10701-020-00364-2
Klein, O.: Quantentheorie und Fünfdimensionale Relativitätstheorie. Z. Phys. 37, 895 (1926)
Fock, V.: Zur Schrödingerschen Wellenmechanik. Z. Phys. 37, 242 (1926)
Gordon, W.: Der Comptoneffekt Nach der Schrödingerschen Theorie. Z. Phys. 40, 117 (1926)
Newton, T.D., Wigner, E.P.: Localized states for elementary systems. Rev. Mod. Phys. 21, 400 (1949)
Amrein, W.O.: Localizability for particles of mass zero. Helv. Phys. Acta 42, 149 (1969)
Barut, A.O., Racza, R.: Theory of Group Repesentations and Applications. World Scientific, Singapore (1986)
Nisticò G.: Group theoretical derivation of the minimal coupling principle. Proc. R. Soc. A. (2017) https://doi.org/10.1098/rspa.2016.0629
Simon B.: In: Lieb, E.H, Simon, B., Wightman, A.S. (eds.) Studies in Mathematical Physics: Essays in Honor of Valentine Bargmann. Princeton: Princeton Un. Press, pp. 327–350 (1976)
Foldy, L.L.: Synthesis of covariant particle equations. Phys. Rev. 102, 568 (1956)
Kàlnay, A.J.: In: Bunge, M. (ed) Problems in the Foundations of Physics. Springer, Berlin (1971)
Jadzyck, A.Z., Jancewicz, B.: Maximal localizability of photons. Bull. Ac. Sci. Polon XXI:477 (1972)
Bacry, H.: The Poincare group, the Dirac Monopole and photon localisation. J. Phys. A 14, L73 (1981)
Bacry, H.: Localizability and Space in Quantum Physics. Lecture Notes in Physics, vol. 308. Springer, Berlin (1988)
Schroeck, E.F.: Quantum Mechanics on Phase Space. Kluwer Academic Publishers, Dordrecht (1996)
Reed, M., Simon, B.: Methods of Modern Mathematical Physics. Academic Press, New York (1972)
Nisticò, G.: New representations of Poincare group for consistent relativistic particle theories. J. Phys. 1275, 12034 (2019)
Raman, C.V., Bhagavantam, S.: Experimental proof of the spin of the photon. Indian J. Phys. 6, 353 (1931)
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Nisticò, G. Group Theoretical Derivation of Consistent Massless Particle Theories. Found Phys 51, 112 (2021). https://doi.org/10.1007/s10701-021-00494-1
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DOI: https://doi.org/10.1007/s10701-021-00494-1