4 ms·
So? Suppose you have two clocks that are synchronized to +-dt1, and sending messages takes some known amount of time +-dt2 and you want to make sure the sender
by bloaf 5y ago
So?
Suppose you have two clocks that are synchronized to +-dt1, and sending messages takes some known amount of time +-dt2 and you want to make sure the sender is able to transmit within +dt3 of whatever event triggered the send event.
It seems to me that you'd be able to transmit at least dt3/(2*(dt1+dt2)) distinct values with the pretty naive approach of discretizing time into segments longer than the uncertainty between the message-and-clock error. I'd be willing to bet that a sophisticated approach could do much better.
- macintux 5y agoSeems like the overhead to ensure two different systems' clocks are sufficiently synchronized would be fairly expensive. It looks like PTP only works on a local network; not sure how you'd do that across the Internet. https://en.wikipedia.org/wiki/Precision_Time_Protocol https://en.wikipedia.org/wiki/Precision_Time_Protocol
- Fordec 5y agoCould quantum entanglement do this? If you collapse the wave function on one end, the other collapses instantaneously. It may not be any good in itself for transferring information, but it could be used as the signal to synchronize on?
- catlifeonmars 5y agoWouldn’t that count as sending information?
- zitterbewegung 5y agoYes that’s the point of my argument
- hoseja 5y agoYou can't know when exactly the collapse occurred, I think.
- zitterbewegung 5y agoNo, what you suggestion would also imply superluminal communication because you also have to send what your are measuring (such as polarization) classically. Now you are sending three bits .
- Fordec 5y agoIt would be luminal. But combine the knowledge of the location with speed of light and you can backwards engineer the difference. But because it's luminal without needing directionality, that cuts out a bunch of the question marks on optical networking.
- zitterbewegung 5y agoI wouldn’t use the internet. I would instead use wwv or a atomic clock (Facebook has one in development that you can put in a PCIe slot)