Time-System Entanglement and Special Relativity

Understand

We know that space and time are treated almost equally in classical physics, but we also know that this is not the case for quantum mechanics.

• A quantum description of both space and time is important to really understand the quantum nature of reality.
• The Page-Wootters mechanism of quantum time is a promising starting point, according to which the evolution of the quantum system is described by the entanglement between it and quantum temporal degrees of freedom.
• In this paper, we consider a qubit clock that is entangled with a quantum system due to the Wigner rotation induced by Lorentz transformation.