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Can an Experiment with Delayed-Choice Quantum Erasers and Time Crystals show evidence of a Multiverse?

Tariq Khan

Published Jan 5, 2023• 0 citations
Publisher

Abstract

A short and informal essay proposing a modification to the delayed-choice quantum eraser experiment by including time crystals as an additional feature. The possible results or outcomes are considered including speculations on possible applications and philosophical interpretations. A proposed experiment using two observers at three points in time and a bank of delayed-choice quantum erasers each linked to a time crystal might either show we live in a multiverse, possibly send messages back in time, or redefine or even refute the current understanding of the nature of time crystals. The hope is that this proposal can help the debate over the nature of the delayed-choice quantum eraser experiment and help further clarify the nature of time crystals and even the role of conscious observers in quantum eraser experiments.

DOI
10.31234/osf.io/uxvar

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A short and informal essay proposing a modification to the delayed-choice quantum eraser experiment by including time crystals as an additional feature. The possible results or outcomes are considered including speculations on possible applications and philosophical interpretations. A proposed experiment using two observers at three points in time and a bank of delayed-choice quantum erasers each linked to a time crystal might either show we live in a multiverse, possibly send messages back in time, or redefine or even refute the current understanding of the nature of time crystals. The hope is that this proposal can help the debate over the nature of the delayed-choice quantum eraser experiment and help further clarify the nature of time crystals and even the role of conscious observers in quantum eraser experiments.
In this article, the author proposes a modification to the delayed-choice quantum eraser experiment by including time crystals as an additional feature. The possible results or outcomes are considered including speculations on possible applications and philosophical interpretations. A proposed experiment using two observers at three points in time and a bank of delayed-choice quantum erasers each linked to a time crystal might either show we live in a multiverse, possibly send messages back in time, or redefine or even refute the current understanding of the nature of time crystals. The hope is that this proposal can help the debate over the nature of the delayed-choice quantum eraser experiment and help further clarify the nature of time crystals and even the role of conscious observers in quantum eraser experiments.
Ever since the proposal of delayed choice quantum erasure and subsequent realization in the experiment by Kim et al., the interpretation and implications of delayed-choice experiments have remained a subject of intense foundational debate. This paper resolves the apparent paradox attached to the experiment using standard quantum mechanics. Using an extended Mach-Zehnder interferometer which captures every operational feature of the original experiment, we show that choosing between which-path and erasure detectors is simply a choice of measurement bases, which does not rewrite a photon's past. Furthermore, by mapping the experiment to a two-way Stern-Gerlach framework, we prove that quantum erasure is an expected result of measuring entangled states, not a physical anomaly. Ultimately, through a pedagogical game, we illustrate that the illusion of retrocausality arises from asking illegitimate questions, and that a forward-in-time description is entirely sufficient to explain the logic.
This work examines the well-known delayed choice Quantum Eraser experiment carried out by Kim et al in 2000 from the standpoint of Classical Physics. I've drawn a diagram of the experiment's setup. I show that the experiment's outcome can be explained using Classical Physics, and that it does not require "spooky action at a distance" owing to entangled particles, as Einstein famously put it, nor events changing the past due to the experiment's delayed choice feature.