Quantum superposition decays near black holes in groundbreaking study

A new study has uncovered how quantum superposition decays near black holes. The findings reveal that this decay is closely tied to the quantum state of the surrounding field. Researchers propose a method to examine the relationship between decoherence and the properties of the quantum environment in detail. The team reformulated a thought experiment involving a particle near a black hole. They used the Wightman function to describe the loss of quantum coherence. This approach allows them to calculate decoherence without relying on complex global calculations.

Their results show that decoherence near black holes depends on the quantum state of the surrounding field. The Boulware vacuum prevents decoherence entirely. In contrast, the Unruh and Hartle-Hawking vacua induce decoherence at a measurable rate of 0.1 due to thermal effects. The rate also varies with the proper distance between the components of the superposition.

The research highlights a fundamental link between the decay of quantum superposition and the state of the surrounding quantum field. This offers a fresh perspective on the interaction between quantum mechanics and gravity. The study provides a new way to analyse quantum decoherence in extreme environments. It demonstrates that different quantum vacua influence decoherence in distinct ways. These findings could improve understanding of quantum behaviour near black holes and its connection to the surrounding quantum field.