6 papers
Minimally invasive measurement of work in coherent quantum systems
Cyril Elouard, Karen Hovhannisyan, Giulia Rubino
A central challenge in quantum thermodynamics is to access work fluctuations in coherent processes without distorting the energetics of the unmeasured evolution. In standard two-po…
Autonomous conversion of particle-exchange to quantum self-oscillations
Sofia Sevitz, Federico Cerisola, Karen V. Hovhannisyan +1
Particle-exchange machines utilize electronic transport to continuously transfer heat between fermionic reservoirs. Here, we couple a quantum mechanical resonator to a particle-exc…
Revising the quantum work fluctuation framework to encompass energy conservation
Giulia Rubino, Karen V. Hovhannisyan, Paul Skrzypczyk
Work is a process-based quantity, and its measurement typically requires interaction with a measuring device multiple times. While classical systems allow for non-invasive and accu…
Correlations enable lossless ergotropy transport
Rick P. A. Simon, Janet Anders, Karen V. Hovhannisyan
"A battery powers a device" can be read as "work stored in the battery is being transported to the device." In quantum batteries, the total amount of stored work can be measured by…
Concentration of ergotropy in many-body systems
Karen V. Hovhannisyan, Rick P. A. Simon, Janet Anders
Ergotropy -- the maximal amount of unitarily extractable work -- measures the ``charge level'' of quantum batteries. We prove that in large many-body batteries ergotropy exhibits a…
Energy conservation and fluctuation theorem are incompatible for quantum work
Karen V. Hovhannisyan, Alberto Imparato
Characterizing fluctuations of work in coherent quantum systems is notoriously problematic. Here we reveal the ultimate source of the problem by proving that () energ…