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Fundamental Limits of Repeaterless Quantum Communications
Stefano Pirandola, Riccardo Laurenza, Carlo Ottaviani +1
Quantum communications promises reliable transmission of quantum information, efficient distribution of entanglement and generation of completely secure keys. For all these tasks,…
Quantum gate learning in engineered qubit networks: Toffoli gate with always-on interactions
Leonardo Banchi, Nicola Pancotti, Sougato Bose
We put forward a strategy to encode a quantum operation into the unmodulated dynamics of a quantum network without the need of external control pulses, measurements or active feedb…
Quantum fidelity for arbitrary Gaussian states
Leonardo Banchi, Samuel L. Braunstein, Stefano Pirandola
We derive a computable analytical formula for the quantum fidelity between two arbitrary multimode Gaussian states which is simply expressed in terms of their first- and second-ord…
Perfect wave-packet splitting and reconstruction in a one-dimensional lattice
Leonardo Banchi, Enrico Compagno, Sougato Bose
Particle delocalization is a common feature of quantum random walks in arbitrary lattices. However, in the typical scenario a particle spreads over multiple sites and its evolution…
Integrated information storage and transfer with a coherent magnetic device
Ning Jia, Leonardo Banchi, Abolfazl Bayat +2
Quantum systems are inherently dissipation-less, making them excellent candidates even for classical information processing. We propose to use an array of large-spin quantum magnet…