Hi all,
this is a reminder of Oscar Dahlsten's quantum information talk
today at 4pm in the Bob Room (note unusual location).
Title: Laws of thermodynamics beyond the von Neumann regime
Speaker: Oscar Dahlsten (Oxford University & NUS
Singapore)
Abstract:
http://arxiv.org/abs/1207.0434
A recent development in information theory is the generalisation of
quantum Shannon information theory to the operationally motivated
smooth entropy information theory, which originates in quantum
cryptography research. In a series of papers the first steps have
been taken towards creating a statistical mechanics based on smooth
entropy information theory. This approach turns out to allow us to
answer questions one might not have thought were possible in
statistical mechanics, such as how much work one can extract in a
given realisation, as a function of the failure-probability. This is
in contrast to the standard approach which makes statements about
average work. Here we formulate the laws of thermodynamics that this
new approach gives rise to. We show in particular that the Second
Law needs to be tightened. The new laws are motivated by our main
quantitative result which states how much work one can extract or
must invest in order to affect a given state change with a given
probability of success. For systems composed of very large numbers
of identical and uncorrelated subsystems, which we call the von
Neumann regime, we recover the standard von Neumann entropy
statements.
Joint work with Egloff, Renner and Vedral
Date: Monday, April 29, 2013 - 4:00 pm
Location: Bob Room (405)
Hope to see you there!
Best,
Markus