TY - JOUR
T1 - Spinning particles coupled to gravity and the validity of the universality of free fall
AU - Hojman, Sergio A.
AU - Asenjo, Felipe A.
N1 - Funding Information:
FAA thanks the CONICyT-Chile for partial support through Funding No. 79130002.
Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/5/19
Y1 - 2017/5/19
N2 - Recent experimental work has determined that free falling 87Rb atoms on Earth, with vertically aligned spins, follow geodesics, thus apparently ruling out spin-gravitation interactions. It is showed that while some spinning matter models coupled to gravitation referenced to in that work seem to be ruled out by the experiment, those same experimental results confirm theoretical results derived from a Lagrangian description of spinning particles coupled to gravity constructed over forty years ago. A proposal to carry out (similar but) different experiments which will help to test the validity of the universality of free fall as opposed to the correctness of the aforementioned Lagrangian theory, is presented.
AB - Recent experimental work has determined that free falling 87Rb atoms on Earth, with vertically aligned spins, follow geodesics, thus apparently ruling out spin-gravitation interactions. It is showed that while some spinning matter models coupled to gravitation referenced to in that work seem to be ruled out by the experiment, those same experimental results confirm theoretical results derived from a Lagrangian description of spinning particles coupled to gravity constructed over forty years ago. A proposal to carry out (similar but) different experiments which will help to test the validity of the universality of free fall as opposed to the correctness of the aforementioned Lagrangian theory, is presented.
KW - Lagrangian description
KW - spin-gravity coupling
KW - spinning massive particle
UR - http://www.scopus.com/inward/record.url?scp=85019862175&partnerID=8YFLogxK
U2 - 10.1088/1361-6382/aa6ca2
DO - 10.1088/1361-6382/aa6ca2
M3 - Article
AN - SCOPUS:85019862175
SN - 0264-9381
VL - 34
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
IS - 11
M1 - 115011
ER -