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Reversing the direction of heat flow using quantum correlations
It is experimentally demonstrated the reversal of heat flow for two quantum correlated spins-1/2, initially prepared in local thermal states at different effective temperatures, employing a Nuclear Magnetic Resonance setup to observe a spontaneous energy flow from the cold to the hot system.
Wigner Entropy Production Rate.
A theory of irreversible entropy production that is suited for quantum systems exposed to general, nonequilibrium reservoirs is proposed and illustrated by addressing a set of physically relevant situations that clarify both the features and the potential of this proposal.
Entropy production in linear Langevin systems
We study the entropy production rate in systems described by linear Langevin equations, containing mixed even and odd variables under time reversal. Exact formulas are derived for several important…
AC susceptibility as a tool to probe the dipolar interaction in magnetic nanoparticles
Thermodynamic Uncertainty Relations from Exchange Fluctuation Theorems.
This Letter identifies the tightest (and saturable) matrix-valued TUR that can be derived from the exchange fluctuation theorems describing the statistics of heat and particle flow between multiple systems of arbitrary dimensions.
Irreversible entropy production: From classical to quantum
Entropy production is a key quantity in any finite-time thermodynamic process. It is intimately tied with the fundamental laws of thermodynamics, embodying a tool to extend thermodynamic…
Collisional Quantum Thermometry.
- S. Seah, S. Nimmrichter, D. Grimmer, J. P. Santos, V. Scarani, G. Landi
- PhysicsPhysical review letters
- 29 April 2019
This work shows through a minimal qubit model that individual ancillas can already outperform the thermal Cramer-Rao bound, and sets forth the notion of metrology in a sequential interactions setting, and may inspire further advances in quantum thermometry.
Quantum Fluctuation Theorems beyond Two-Point Measurements.
We derive detailed and integral quantum fluctuation theorems for heat exchange in a quantum correlated bipartite thermal system using the framework of dynamic Bayesian networks. Contrary to the usual…
Role of dipolar interaction in magnetic hyperthermia
- G. Landi
- 6 January 2014
The dynamic properties of magnetic nanoparticles are known to be substantially influenced by the dipole-dipole interaction. In this paper we study how this affects the efficiency of magnetic…
The role of quantum coherence in non-equilibrium entropy production
Thermodynamic irreversibility is well characterized by the entropy production arising from non-equilibrium quantum processes. We show that the entropy production of a quantum system undergoing…