2 citations · 2 across the 12 of their papers we have counts for
12 papers
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…
Second-Order Expansion of Privacy Amplification Under f-Divergence Criteria
Mario Berta, Hao-Chung Cheng, Marco Tomamichel
We derive the second-order asymptotics of randomness extraction from memoryless sources with side information under security criteria based on a broad class of Csiszàr f-divergence…
Minimax games for quantum channel discrimination
Kun Fang, Michael X. Cao, Hao-Chung Cheng +2
Quantum channel discrimination is a primitive task for identifying, verifying, and benchmarking quantum dynamics. Previous studies have primarily considered either the best-case te…
No information transmission through quantum channels above capacity
Hao-Chung Cheng, Marco Tomamichel
We show that the capacity of a quantum channel demarcates a phase transition: while reliable transmission below capacity is always possible, any attempt to transmit information abo…
Strong Converse Exponent of Quantum State Merging
Mario Berta, Hao-Chung Cheng, Roberto Rubboli +1
We determine the strong converse exponent for the entanglement cost of quantum state merging, showing that it is characterized by the optimized - conditional Rényi entropies…
Sharp Continuity of Petz and Sandwiched Rényi Conditional Entropies
Hao-Chung Cheng, Po-Chieh Liu
We determine the sharp modulus of continuity, in trace distance, of the optimized Petz and sandwiched Rényi conditional entropies for every order . If two bipartit…
Superadditivity for Entanglement-Assisted Communication
Hao-Chung Cheng, Mario Berta
The entanglement-assisted capacity of a quantum channel admits an additive single-letter characterization, implying that joint encodings across channel uses cannot increase the ult…
Device-independent Quantum Key Distribution in the commuting operator framework
Gereon Koßmann, René Schwonnek, Po-Chieh Liu +1
Device-independent quantum key distribution (DIQKD) is arguably the gold standard for secure quantum communication, as it aims to rely only on observed input-output statistics of a…
Multiple Quantum Hypothesis Testing: One-Shot Pairwise Bounds and Sharp Asymptotics
Hao-Chung Cheng, Po-Chieh Liu
We consider Bayesian discrimination among multiple quantum states and establish a dimension-free one-shot upper bound on the minimum probability of error in terms of the sum of pai…
Tight any-shot quantum decoupling
Mario Berta, Hao-Chung Cheng, Yongsheng Yao
Quantum information decoupling is a fundamental primitive in quantum information theory, underlying various applications in quantum physics. We prove a novel one-shot decoupling th…
Exponents for Shared Randomness-Assisted Channel Simulation
Aadil Oufkir, Michael X. Cao, Hao-Chung Cheng +1
We determine the exact error and strong converse exponents of shared randomness-assisted channel simulation in worst case total-variation distance. Namely, we find that these expon…
Distributed Quantum Hypothesis Testing under Zero-rate Communication Constraints
Sreejith Sreekumar, Christoph Hirche, Hao-Chung Cheng +1
The trade-offs between error probabilities in quantum hypothesis testing are by now well-understood in the centralized setting, but much less is known for distributed settings. Her…