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Refined sample complexities from the tomographic rate function
Arick Grootveld, Alexander Maloney, Jason Pollack +1
Protocols for quantum state tomography can be characterized either by their sample complexity or by the tomographic rate function that governs the large deviation behaviour of erro…
Explicit channels with unbounded gains in classical communication using entangled inputs
Hao-Chung Cheng, Benjamin Lovitz, Peixue Wu
A seminal result of Hastings showed that entangled inputs can increase the rate of classical communication through independent uses of a quantum channel. While Hastings' result pro…
Superadditivity of classical communication over quantum channels via random and deterministic permutations
Benjamin Lovitz, Peixue Wu
Since Hastings' proof of superadditivity of classical communication over quantum channels, considerable effort has been devoted to finding a structural explanation of this phenomen…
Private Correlations Certify Sensing Capability
Yunkai Wang, Peixue Wu, Graeme Smith +1
We show that private correlations in a bipartite quantum state constitute a metrological resource for distributed sensing assisted by a possibly noisy channel from one party to the…
Counterexamples to additivity of minimum output -Rényi entropy of quantum channels for all
Debbie Leung, Benjamin Lovitz, Ion Nechita +1
The additivity of minimum output entropies is a central problem in quantum information theory. Nonadditivity is known for every Rényi order , at the von Neumann point , a…
The Optimal Rate Function in Covariant Quantum State Tomography
Arick Grootveld, Alexander Maloney, Jason Pollack +1
The problem of quantum tomography is to estimate an unknown quantum state from a measurement of copies of . One can ask which tomography protocol, i.e.\ which choice of…
Single-letter one-way distillable entanglement for non-degradable states
Rabsan Galib Ahmed, Graeme Smith, Peixue Wu
The one-way distillable entanglement is a central operational measure of bipartite entanglement, quantifying the optimal rate at which maximally entangled pairs can be extracted by…