Aging and communication in the twin paradox

Abstract

The twin paradox of the special theory of relativity has given rise to a large body of literature discussing its implications. In its standard form, the traveler changes velocity only at the destination of the trip, so that he appears to perceive an improbably instantaneous and non-continuous change in of the stationary twin. In this work, a age smooth velocity/acceleration profile is used that allows the abrupt velocity-change case as a limit. All gravitational effects are ignored in this treatment. Aside from mutual perception of simultaneous clock times in an accelerating frame, constant communication of clock times between the twins by means of (digital) light signals is shown to be possible, in principle if not in practice.

This Year's Nobel Prize (2022) in Physics for Entanglement and Quantum Information: the New Revolution in Quantum Mechanics and Science

“…However, if one grants the latter viewpoint (to the reference frame of the space-traveler), the homebody should be younger 20 There are many papers (e.g. Ben-Ya'acov 2016;Franson 2016;Fung, Clark, Lewis, Wu 2016;de Wolf 2016;Garcia-Escartin, Chamorro-Posada 2015;Gasperini 2014;Lindkvist, Sabín, Fuentes, Dragan, Svensson, Delsing, Johansson 2014;Moreau, Devaux, Lantz 2014;Sokołowski, Golda 2014;2014a;Grøn 2013;Carvalho 2012;Friebe 2012;Ord 2012;Sfarti 2012;Sokołowski 2012;Boblest, Müller, Wunner 2011;Grøn, Braeck 2011;Lichtenegger, Iorio 2011;Székely 2010;Grandou, Rubin 2009;Müller, King, Adis 2008;Roukema, Bajtlik 2008;Abramowicz, Bajtlik, Kluźniak 2007;Boccaletti, Catoni, Catoni 2007;2007a;Grøn 2006;Kohler 2006;McCall 2006;Madarász, Németi, Székely 2006;Ghosal, Nepal, Das 2005;Pesic 2003;Soni 2002;Uzan, Luminet, Lehoucq, Peter 2002;Barrow, Levin 2001;Dolby, Gull 2001;Weeks 2001;Cranor, Heider, Price 2000;Schön 1998;…”