4 papers · 1 filter
Adding noise and scaling forces to speed up the Langevin clock
Prithviraj Basak, Stephen Whitelam, John Bechhoefer
Using experiments on a colloidal particle trapped in an optical tweezer, we confirm a recent proposal to increase the effective mobility or clock rate of systems described by Lange…
Improving noisy free-energy measurements by adding more noise
Stephen Whitelam
Estimating free-energy differences using nonequilibrium work relations, such as the Jarzynski equality, is hindered by poor convergence when work fluctuations are large. For system…
Nonequilibrium formulation of varying-temperature bit erasure
Stephen Whitelam
Landauer's principle states that erasing a bit of information at fixed temperature T costs at least kT ln 2 units of work. Here we investigate erasure at varying temperature, to wh…
Free-energy estimates from nonequilibrium trajectories under varying-temperature protocols
Stephen Whitelam
The Jarzynski equality allows the calculation of free-energy differences using values of work measured from nonequilibrium trajectories. The number of trajectories required to accu…