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Bounding the resources for thermalizing many-body localized systems
Understanding under which conditions physical systems thermalize is a long-standing question in many-body physics. While generic quantum systems thermalize, there are known instances where
Gaussian state interferometry with passive and active elements
We address precision of optical interferometers fed by Gaussian states and involving passive and/or active elements, such as beam splitters, photodetectors and optical parametric amplifiers. We first
A Resource Theory for Work and Heat
This work proposes a resource theory of quantum thermodynamics without a background temperature, so that no states at all come for free, and applies this resource theory to the case of many non-interacting systems, and shows that states are classified by their entropy and average energy.
Energetic instability of passive states in thermodynamics
It is shown that an optimal amount of energy can be extracted from any athermal quantum state when using a machine that operates in a reversible cycle.
Bounds to precision for quantum interferometry with Gaussian states and operations
We address high-precision measurements by active and passive interferometric schemes based on Gaussian states and operations. In particular, we look for the best states to be injected into their
The first law of general quantum resource theories
A set of laws for general quantum resource theories, which generalise the laws of thermodynamics are derived, which first test on thermodynamics with multiple conservation laws, and then apply to the theory of local operations under energetic restrictions.
Extremal distributions under approximate majorization
Although an input distribution may not majorize a target distribution, it may majorize a distribution which is close to the target. Here we consider a notion of approximate majorization. For any
Probing qubit by qubit: Properties of the POVM and the information/disturbance tradeoff
We address the class of positive operator-valued measures (POVMs) for qubit systems that are obtained by coupling the signal qubit with a probe qubit and then performing a projective measurement on
Canonical Naimark extension for generalized measurements involving sets of Pauli quantum observables chosen at random
We address measurement schemes where certain observables are chosen at random within a set of non-degenerate isospectral observables and then measured on repeated preparations of a physical system.
Characterising quantum correlations of fixed dimension
We give a converging semidefinite programming hierarchy of outer approximations for the set of quantum correlations of fixed dimension. Starting from the Navascues-Pironio-Acin (NPA) hierarchy for