No Time for Time from No-Time
Eugene Y. S. Chua, Craig Callender
Abstract
Programs in quantum gravity often claim that time emerges from fundamentally timeless physics. In the semiclassical time program, time arises only after approximations are taken. Here we ask what justifies taking these approximations and show that time seems to sneak in when answering this question. This raises the worry that the approach is either unjustified or circular in deriving time from no-time.
Topics & Concepts
WorryArrow of timeSemiclassical physicsProblem of timeTime travelTheoretical physicsTime perceptionTimelessQuantumQuantum gravityComputer scienceEpistemologyPhysicsMathematical economicsPhilosophyQuantum mechanicsMathematicsPsychologyPsychiatryCircadian rhythmAnxietyPerceptionNeuroscienceNoncommutative and Quantum Gravity TheoriesQuantum Mechanics and ApplicationsCosmology and Gravitation Theories