6 papers · 1 filter
Zeno-Assisted Quantum Heat Engines
Selma MemiÄ, Rafael Wagner, Susana F. Huelga +1
Finite-time quantum heat engines (QHEs) typically extract less work than their quasistatic counterparts because fast driving generates coherences and non-adiabatic transitions duri…
Bargmann Scenarios
Rafael Wagner
Considerable effort has been devoted to developing techniques for witnessing and characterizing quantum resources that emerge from collective properties of a set of states. In this…
Commutativity from a single Bargmann invariant equality
Rafael Wagner, Ernesto F. Galvão
Noncommutativity of states and observables is a fundamental signature of quantum theory, and a minimal requirement for nonclassicality. We provide a universal necessary and suffici…
Measuring unitary invariants with the quantum switch
Pedro C. Azado, Rafael Wagner, Rui S. Barbosa +1
Bargmann invariants, multivariate traces of states, completely characterize any unitary-invariant property of a set of states. Unitary invariants enable the description of quantum…
Estimation of multivariate traces of states given partial classical information
Kyrylo Simonov, Rafael Wagner, Ernesto Galvão
Bargmann invariants of order , defined as multivariate traces of quantum states , are useful in applications ranging from quantum metrology to c…
Certifying nonstabilizerness in quantum processors
Rafael Wagner, Filipa C. R. Peres, Emmanuel Zambrini Cruzeiro +1
Nonstabilizerness, also known as magic, is a crucial resource for quantum computation. The growth in complexity of quantum processing units (QPUs) demands robust and scalable techn…