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A theoretical calculation suggests that the gravitational pull between nuclei could shift the frequency of solid-state thorium nuclear clocks once they contain macroscopic numbers of nuclei. The effect is still far from experimental reach, and the article concedes that observing gravitational entanglement remains well beyond current capabilities. For quantum readers, the main takeaway is that precision quantum timekeeping may become a testbed for probing gravity's quantum behaviour, though that remains speculative.
Researchers Find Mutual Gravity Impacts Nuclear Clock Precision
Detecting the faint pull between individual atomic nuclei once seemed firmly outside the realm of possibility. Now, calculations reveal that collective interactions within advanced solid-state thorium clocks might generate measurable shifts in frequency, a subtle effect previously lost amidst background noise. This opens new avenues for exploring gravitational effects using macroscopic numbers of nuclei, though observing entanglement due to gravity remains a distant technological challenge.
Large ensembles of nuclei offer the potential to observe their mutual gravitational interaction. These subtle effects, arising from both mass and energy within each nucleus, may become measurable for macroscopic numbers of clock nuclei, such as those planned for solid-state thorium clocks. Methods using advanced spectroscopy or external sensors could detect shifts in frequency; observing entanglement due to gravity would require further experimental advances beyond…
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