# Online: Seminar, Renato Renner (ETH Zürich), Fundamental Bound on Time Signal Generation #### calendar\_today Date and Time **January 5, 2021** 10:00AM - 10:00AM EST #### pin\_drop Location **Zoom** ![Renato Renner](/sites/g/files/omnuum6611/files/styles/hwp_1_1__960x960_scale/public/mathpicture/files/renato.png?itok=YHmAqfIf) **Location:** Zoom **Time:** Tuesday, January 5, 2021, 10:00 AM (Eastern US), 15:00 (UK/Eire), 16:00 (Central Europe), 23:00 (China) **Title:** Fundamental Bound on Time Signal Generation **Abstract:** Does quantum theory impose any limits on how accurately we can map out spacetime and, if yes, what are they? This question has been studied already in the early days of quantum theory, but it is still a topic of current research. If one takes an operational perspective then the answer obviously depends on how accurately we can generate and measure time signals. In this talk I will present a bound on the latter. Specifically, I will show that the accuracy of a time signal generated by a quantum device is fundamentally limited by an information-theoretic quantity, which we call the “controllable dimension” of the device. (This is joint work with Yuxiang Yang, arXiv:2004.07857.) **Additional Ways to Join** Join by telephone (use any number to dial in) +1 929 436 2866 +1 312 626 6799 +1 669 900 6833 400 669 9381 China Toll-free International numbers available: [https://harvar](https://harvard.zoom.us/u/aclg6kOggb)[d.zoom.us/u/aclg6kOggb](https://harvard.zoom.us/u/aclg6kOggb) One tap mobile: +19294362866,,779283357# US (New York) Join by SIP conference room system Meeting ID: 779 283 357 <779283357@zoomcrc.com> **Attachments** --- Attachments- [ picture\_as\_pdf Flyer.pdf ](/sites/g/files/omnuum6611/files/mathpicture/files/renner_seminar_jan_5_2021.pdf) --- Share on:- [ Facebook ](#) - [ Twitter ](#) - [ Linkedin ](#) Save: [ Add to calendar calendar\_today ](https://mathpicture.fas.harvard.edu/node/1555226/event-feed.ics) Copy link link