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Contemporary Physics

Resolving a paradox

P. J. Bussey

Published Oct 2, 2021• 0 citations
Publisher

Abstract

There are few topics in physics that have excited so many different contrary opinions as Einstein’s so-called ‘Twin Paradox’, otherwise known as the ‘Clock Paradox’. It arises as an apparent conseq...
DOI
10.1080/00107514.2022.2081719

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The role of the observer is essential in determining the reality as well as making measurements of the state of a physical situation. This observation becomes important in elaborating a long-standing paradox of physics known as the Twin Paradox of the Special Theory of Relativity (STR). Einstein showed that the time interval between two events determined by a moving observer is greater than that determined by a stationary observer. The effect is known as time dilation. However, it leads to the paradox that a twin brother returning from a space trip is younger than his twin sister who had stayed home. The resolution of the paradox is assisted by introducing a new requirement of physics called the “reality test.” This states that whatever an observer measures must be real. It also reveals that discrepancies in time measurements can be attributed to the change of state the traveling twin undergoes as he changes velocity over the journey.
The Classical Twin Paradox is widely dealt in literature and neatly resolved. In addition, it is also well known that, when looking at two systems which are boosted relative to each other, the concept of the simultaneous effect of a quantum measurement in space-time causes some discrepancies in the cause-effect behavior. However, these discrepancies have been thought not to cause any apparent paradox except for violating the Free-Will postulate. In this paper we suggest that using the local t axis, all over space, as the axis in which the quantum measurement is thought to be simultaneous, we do reach a kind of true "Twin Paradox". The resolution of this paradox requires the introduction of a global proper time into a covariant quantum theory.