7 papers
Experimental Quantum Key Distribution in an Indefinite Causal Order
Yann Valibouse, Martí Cladera-Rosselló, Michael Antesberger +6
In quantum physics the order in which different operations occur can be placed in superposition. The resulting processes have an indefinite causal order and are both of fundamental…
Correlations in a quantum switch-based heat engine with measurements: A proof-of-principle demonstration
Vinicius F. Lisboa, Pedro R. Dieguez, Kyrylo Simonov +1
Allowing the order of quantum operations to exist in superposition is known to open new routes for thermodynamic tasks. We investigate a quantum heat engine where energy exchanges…
Higher-order transformations of bidirectional quantum processes
Luca Apadula, Alessandro Bisio, Giulio Chiribella +2
Bidirectional devices are devices for which the roles of the input and output ports can be exchanged. Mathematically, these devices are described by bistochastic quantum channels,…
Paradox-free classical non-causality and unambiguous non-locality without entanglement are equivalent
Hippolyte Dourdent, Kyrylo Simonov, Andreas Leitherer +5
Closed timelike curves (CTCs) challenge our conception of causality by allowing information to loop back into its own past. Any consistent description of such scenarios must avoid…
Activation of thermal states by coherently controlled thermalization processes
Kyrylo Simonov, Saptarshi Roy, Tamal Guha +2
Thermalization processes degrade the states of any working medium, turning any initial state into a passive state from which no work can be extracted. Recently, it has been shown t…
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…