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5 papers · 2 filters
Topologically protected strongly-correlated states of photons
Matouš Ringel, Mikhail Pletyukhov, Vladimir Gritsev
Hybrid photonic nanostructures allow the engineering of novel interesting states of light. One recent example is topological photonic crystals where a nontrivial Berry phase of the…
Recoupling coefficients and quantum entropies
Matthias Christandl, Mehmet Burak Şahinoğlu, Michael Walter
We prove that the asymptotic behavior of the recoupling coefficients of the symmetric group is characterized by a quantum marginal problem -- namely, by the existence of quantum st…
Violating the Shannon capacity of metric graphs with entanglement
Jop Briet, Harry Buhrman, Dion Gijswijt
The Shannon capacity of a graph G is the maximum asymptotic rate at which messages can be sent with zero probability of error through a noisy channel with confusability graph G. Th…
Classical simulation of entanglement swapping with bounded communication
Cyril Branciard, Nicolas Brunner, Harry Buhrman +5
Entanglement appears under two different forms in quantum theory, namely as a property of states of joint systems and as a property of measurement eigenstates in joint measurements…
Complete Insecurity of Quantum Protocols for Classical Two-Party Computation
Harry Buhrman, Matthias Christandl, Christian Schaffner
A fundamental task in modern cryptography is the joint computation of a function which has two inputs, one from Alice and one from Bob, such that neither of the two can learn more…