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Harvesting Non-Classical Fluctuations with Thermal Machines

Total Cost €


EC-Contrib. €






Project "QUANTUM HARVEST" data sheet

The following table provides information about the project.


Organization address
address: Paradisgatan 5c
city: LUND
postcode: 22100
website: n.a.

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Sweden [SE]
 Total cost 185˙857 €
 EC max contribution 185˙857 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2017
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2018
 Duration (year-month-day) from 2018-07-01   to  2020-12-03


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    LUNDS UNIVERSITET SE (LUND) coordinator 185˙857.00


 Project objective

The goal of this action is to contribute towards the development of thermal machines which harvest the thermal as well as quantum fluctuations that are present in nanoscopic devices. To this end, a better understanding of fluctuations in thermal machines is required. The present proposal therefore includes a thorough investigation of fluctuations in quantum thermal machines. A focus lies on the non-classical character of these fluctuations and on the extraction of work from quantum heat engines. The proposal is divided into four work packages. In order to certify non-classical behavior, the first work package develops appropriate witnesses of non-classicality. The fluctuations in thermal machines are then investigated in three complementary work packages. Work package two investigates the fluctuations of heat, work, and efficiency in heat engine models. Non-classical behavior is expected to manifest itself in these fluctuations. A novel, Keldysh type input-output formalism will be developed to go beyond the standard regime of weak coupling between machine and thermal reservoirs. Work package three focuses on fluctuations that arise due to the finite size of thermal reservoirs present in mesoscopic systems. To this end, a novel formalism based on stochastic path integrals and quantum master equations will be developed. Work package four finally focuses on the crossover from a classical to a quantum regime. To this end, thermodynamic processes such as the expansion of a gas are investigated. Explicitly taking into account how work is extracted from the system, back-action effects from the corresponding quantum measurement are investigated. Together, these work packages give a rather complete picture on different types of fluctuations in quantum thermal machines. This is expected to settle the open question of a quantum advantage in thermal machines and will likely lead to novel types of machines which harvest thermal as well as quantum fluctuations.


year authors and title journal last update
List of publications.
2019 Rafael Sánchez, Peter Samuelsson, Patrick P. Potts
Autonomous conversion of information to work in quantum dots
published pages: , ISSN: 2643-1564, DOI: 10.1103/PhysRevResearch.1.033066
Physical Review Research 1/3 2020-03-06
2019 Patrick P. Potts, Peter Samuelsson
Thermodynamic uncertainty relations including measurement and feedback
published pages: , ISSN: 2470-0045, DOI: 10.1103/physreve.100.052137
Physical Review E 100/5 2020-03-06
2019 Potts, Patrick P.
Introduction to Quantum Thermodynamics (Lecture Notes)
published pages: , ISSN: , DOI:
2019 Sara Kheradsoud, Nastaran Dashti, Maciej Misiorny, Patrick P. Potts, Janine Splettstoesser, Peter Samuelsson
Power, Efficiency and Fluctuations in a Quantum Point Contact as Steady-State Thermoelectric Heat Engine
published pages: 777, ISSN: 1099-4300, DOI: 10.3390/e21080777
Entropy 21/8 2020-03-06
2019 Patrick P. Potts
Certifying Nonclassical Behavior for Negative Keldysh Quasiprobabilities
published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.122.110401
Physical Review Letters 122/11 2020-03-06
2018 Patrick P. Potts, Peter Samuelsson
Detailed Fluctuation Relation for Arbitrary Measurement and Feedback Schemes
published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.121.210603
Physical Review Letters 121/21 2020-03-06

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