Hi all,

This week, Jakob Miller will talk about “Incoherent Feedback Protocols in Timekeeping Devices: Never touch your ticking clocks?”. 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: Incoherent Feedback Protocols in Timekeeping Devices: Never touch your ticking clocks?

Abstract: From an operational perspective any physical system that allows one to measure the passage of time can be regarded as a clock. If one additionally demands that the clock is not influenced by the act of reading off the time, one is naturally lead to the formalism of ticking clocks that we introduce in this talk. In particular, we discuss ticking clocks that satisfy the properties of self-timing and clockwork independence. In order to quantify the quality of the clock’s time estimate, we study the signal-to-noise ratio. Motivated by the relevance of feedback mechanisms in atomic clocks, we propose a notion of incoherent feedback protocols for ticking clocks. We provide numeric evidence that feedback-controlled quantum clockworks can achieve fundamentally higher signal-to-noise ratios when compared to their non-controlled counterparts.