PIRSA:17110046

Quantum fluctuation theorems, contextuality and work quasi-probabilities

Lostaglio, M. (2017). Quantum fluctuation theorems, contextuality and work quasi-probabilities. Perimeter Institute. https://pirsa.org/17110046

Lostaglio, Matteo. Quantum fluctuation theorems, contextuality and work quasi-probabilities. Perimeter Institute, Nov. 28, 2017, https://pirsa.org/17110046 

          @misc{ pirsa_PIRSA:17110046,
            doi = {10.48660/17110046},
            url = {https://pirsa.org/17110046},
            author = {Lostaglio, Matteo},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Quantum fluctuation theorems, contextuality and work quasi-probabilities},
            publisher = {Perimeter Institute},
            year = {2017},
            month = {nov},
            note = {PIRSA:17110046 see, \url{https://pirsa.org}}
          }

Matteo Lostaglio

University of Amsterdam

Talk number
PIRSA:17110046
Collection
Talk Type
Subject
Abstract

We discuss the role of contextuality within quantum fluctuation theorems, in the light of a recent no-go result by Perarnau et al. We show that any fluctuation theorem reproducing the two-point measurement scheme for classical states either admits a notion of work quasi-probability or fails to describe protocols exhibiting contextuality.

Conversely, we describe a protocol that smoothly interpolates between the two-point measurement work distribution for projective measurements and Allahverdyan's work quasi-probability for weak measurements, and show that the negativity of the latter is a direct signature of contextuality.