aiqbench takeQuantum Computing

This research establishes a direct theoretical link between matter-wave interferometry and quantum gravity by quantifying how graviton emission induces which-path decoherence in superposition states. While the effect is currently negligible with existing technology (ranging from 10⁻⁶⁴ to 10⁻⁷⁴), the study identifies squeezed states as a potential future pathway for observing gravitational quantum effects, bridging fundamental physics and experimental feasibility.

Source coveringQuantum Zeitgeist

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Matter-Wave Decoherence Scales With Mean Number of Radiated Gravitons

Quantum ZeitgeistAugust 3, 20264 min read

Graviton-induced which-path decoherence in matter-wave interferometry is shown to depend on the mean number of radiated gravitons, ranging from 10⁻¹⁴ to 10⁻²⁹.

The decoherence of matter-wave interference, a key quantum effect, scales directly with the number of radiated gravitons according to new calculations by Hiroki Matsui of Osaka Metropolitan University. The work demonstrates that the decoherence exponent equals half the mean number of gravitons emitted by the difference between a matter-wave’s two paths, establishing a direct link between a measurable quantum phenomenon and the elusive, never-directly-observed graviton. Across representative matter-wave platforms, this decoherence ranges from approximately 10 to the power of negative 64 to…

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