Motivated by the qualitative picture of canonical typicality, we propose a refined formulation
of the eigenstate thermalization hypothesis (ETH) for chaotic quantum systems. This …

The temperature of a physical system is operationally defined in physics as “that quantity
which is measured by a thermometer” weakly coupled to, and at equilibrium with the system …

Quantum systems strongly coupled to many-body systems equilibrate to the reduced state of
a global thermal state, deviating from the local thermal state of the system as it occurs in the …

Temperature is usually defined for physical systems at thermal equilibrium. Nevertheless
one may wonder if it would be possible to attribute a meaningful notion of temperature to an …

Tensor-network methods are routinely used in approximating various equilibrium and
nonequilibrium scenarios, with the algorithms requiring a small bond dimension at low …

In classical thermodynamics energy always flows from the hotter system to the colder one.
However, if these systems are initially correlated, the energy flow can reverse, making the …

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 …

Precise low-temperature thermometry is a key requirement for virtually any quantum
technological application. Unfortunately, as the temperature T decreases, the errors in its …

The last decade has witnessed remarkable progress in our understanding of thermalization
in isolated quantum systems. Combining the eigenstate thermalization hypothesis with …

The Hamiltonian of mean force is an effective Hamiltonian that allows a quantum system,
nonweakly coupled to an environment, to be written in an effective Gibbs state. We present …