No Time for Time from No-Time

No Time for Asynchrony

In their early days, distributed systems were designed under a synchronous (message-passing) model, which assumes bounds on processing and communication delays. These assumptions allowed processes to handle unresponsive processes easily with end-to-end timeouts. However, current distributed systems cannot meet endto-end timing properties because they are composed of a diverse stack of layers, e...

No time for classical mechanics?

We prove a classical analogue of Pauli’s theorem, showing that there is no time observable in classical mechanics in the very same sense that there is no time observable in quantum mechanics. We then examine how this result can be circumvented, and argue the result suggests a certain Aristotelian interpretation of time in classical mechanics.

No time to rest.

No ordinary time.

No sliding in time

In this letter, we analyse the following apparent paradox: as has been recently proved by Hastings (2004 Phys. Rev. 69 104431), under a general set of conditions, if a local Hamiltonian has a spectral gap above its (unique) ground state (GS), all connected equal-time correlation functions of local operators decay exponentially with distance. On the other hand, statistical mechanics provides us ...