11 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…
Scaling native entanglement generation in layered semiconductors with quasi-phase matching
Benjamin Braun, Andrea Alessandrini, Josip Bajo +10
Efficient generation of entangled photons typically relies on spontaneous parametric down-conversion (SPDC) in phase-matched macroscopic nonlinear media. However, generating entang…
Toward an Experimental Device-Independent Verification of Indefinite Causal Order
Carla M. D. Richter, Michael Antesberger, Huan Cao +2
In classical physics, events follow a definite causal order: the past influences the future, but not the reverse. Quantum theory, however, permits superpositions of causal orders -…
Time-Delocalized Local Measurements in an Indefinite Causal Order
Yann Valibouse, Martà Cladera-Rosselló, Michael Antesberger +3
Processes with indefinite causal order (ICO), such as the quantum switch, are an emerging resource for quantum tasks and a fundamental test bed for studies of temporal correlations…
Testing Single Photon Entanglement using Self-Referential Measurements
Daniel Kun, Teodor Strömberg, Borivoje DakiÄ +2
Entanglement does not always require one particle per party. It was predicted some thirty years ago that a single photon traversing a beam splitter could violate a Bell inequality.…
Entangled Polariton States in the Visible and Mid-Infrared Spectral Ranges
Vladislav Yu. Shishkov, Oleg Kotov, Emily Haughton +5
Entanglement generation in polariton systems is fundamentally constrained by high losses and decoherence, which typically outweigh polariton nonlinearities. Here, we propose a conc…