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This research advances fundamental quantum metrology by characterizing the transient behavior of atomic clocks during their startup phase, where they operate with fewer than one quanta of energy. By analyzing these fleeting moments before stability is reached, the study identifies new pathways to probe the ultimate limits of timekeeping precision using self-powered quantum oscillators. The findings suggest that coherence can be maintained even under dephasing conditions, offering a refined understanding of how to extract temporal information from minimal energy regimes.

Sursă care acoperăQuantum Zeitgeist

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Researchers Map Transient Behaviour of Quantum Clocks

Quantum Zeitgeist18 septembrie 20264 min de cititArticolul și perspectiva sunt în engleză.

Until now, atomic clock precision has been limited by analysing systems only after they’ve settled into stable operation. This work reveals what happens at the very beginning, when fewer than one quanta of energy are present, unlocking access to temporal information previously hidden within fleeting moments. By examining these ‘transient counting statistics’, a new pathway opens to probe fundamental limits to accurate timekeeping with self-powered quantum oscillators.

Models of atomic clocks typically examine frequency or phase stability using many emitted quanta, however recent work suggests statistical information can be gained from examining the few-quanta regime instead. Oscar Arandes at Stockholm University and Sreenath K Manikandan at the Tata Institute of Fundamental Research Hyderabad have investigated simple models for two- and three-level quantum emitters fuelled by dephasing, revealing that these systems maintain coherences even when stable. Researchers explored how internal fluctuations impact the precision of atomic clocks at tiny…

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