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No-Go Theorem for the Characterization of Work Fluctuations in Coherent Quantum Systems.
TLDR
Improvements do appear, and in particular, a measurement scheme is developed that acts simultaneously on two copies of the state and allows us to describe a whole class of coherent transformations.
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Extractable Work from Correlations
TLDR
This work studies how to use correlations among quantum systems to optimally store work and shows that while entanglement gives an advantage for small quantum ensembles, this gain vanishes for a large number of systems.
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Thermodynamic cost of creating correlations
We investigate the fundamental limitations imposed by thermodynamics for creating correlations. Considering a collection of initially uncorrelated thermal quantum systems, we ask how much classical…
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Differential evolution for many-particle adaptive quantum metrology.
TLDR
This work devise powerful algorithms based on differential evolution for adaptive many-particle quantum metrology policies for feedback control that are orders-of-magnitude more efficient and surpass the few-dozen-particles limitation arising in methods based on particle-swarm optimization.
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Enhancement of low-temperature thermometry by strong coupling
We consider the problem of estimating the temperature T of a very cold equilibrium sample. The temperature estimates are drawn from measurements performed on a quantum Brownian probe strongly coupled…
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Geometric Optimisation of Quantum Thermodynamic Processes
TLDR
A pedagogical introduction to the notion of thermodynamic length is introduced, and a geometric lower bound on entropy production in finite-time is presented, which represents a quantum generalisation of the original classical bound.
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Optimal Cycles for Low-Dissipation Heat Engines.
TLDR
It is shown that the optimal strategy is to perform small cycles around a given working point, which can be, thus, chosen optimally, independent of the figure of merit combining power and efficiency that is being maximized.
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Most energetic passive states.
TLDR
This work finds the passive states lying in the other extreme, i.e., those that maximize the energy for a given entropy, which it is shown also minimize the entropy when the energy is fixed.
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Markovian master equations for quantum thermal machines: local versus global approach
The study of quantum thermal machines, and more generally of open quantum systems, often relies on master equations. Two approaches are mainly followed. On the one hand, there is the widely used, but…
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Quantum Thermal Machine as a Thermometer.
TLDR
This work considers a circuit QED implementation that allows for precise thermometry down to ∼15  mK with realistic parameters and demonstrates that the proposal is particularly promising in systems where thermalization between different components of an experimental setup cannot be guaranteed.
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