Eur. Phys. J. Plus (2017) 132: 537
https://doi.org/10.1140/epjp/i2017-11799-6

Regular Article

Spin, torsion and violation of null energy condition in traversable wormholes

¹ INFN, Sezione di Napoli, Complesso Univ. Monte S. Angelo, I-80126, Napoli, Italy
² Dipartimento di Fisica Ettore Pancini, Università di Napoli Federico II, Complesso Univ. di Monte S. Angelo, I-80126, Napoli, Italy

^* e-mail: manfredonia@na.infn.it

Received: 8 November 2017
Accepted: 16 November 2017
Published online: 22 December 2017

Abstract

The static spherically symmetric traversable wormholes are analysed in the Einstein-Cartan theory of gravitation. In particular, we computed the torsion tensor for matter fields with different spin . Interestingly, only for certain values of the spin, the torsion contribution to the Einstein-Cartan field equation allows one to satisfy both flaring-out condition and null energy condition. In this scenario, traversable wormholes can be produced by using usual (non-exotic) spinning matter.