Hi all,

This week, Leonardo Valente will talk about “Decoherence in Quantum Reference Frames”. The talk will take place on Thursday at 11:00 in HIT E41.1. See below for the abstract.

Best, Ladina

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Title: Decoherence in Quantum Reference Frames

Abstract: We explore the phenomenon of decoherence and how it changes under quantum reference frame (QRF) transformations. In particular, we simulate how gravitationally induced decoherence depends on the chosen QRF. In our model, we find that if a massive particle decoheres smoothly over a finite timescale in one QRF, then from the particle’s own QRF, the decoherence appears instantaneous. We analyse this asymmetry and show, using entropy-based tools, that it does not arise from the existence of a privileged QRF. Additionally, we introduce the notion of non-entangling states — a class of states that preserve entanglement and maintain the tensor product structure under QRF transformations — as a way to keep coherence frame-independent.