The broadcast classical–quantum capacity region of a two-phase bidirectional relaying channel

Boche, Holger; Cai, Minglai; Deppe, Christian

doi:10.1007/s11128-015-1065-2

Cited by 4 publications

(3 citation statements)

References 44 publications

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“…Hence, it suffices to consider the bin collection realizations V N of V N that satisfy (46)-( 47), for µ ∈ (0, R pool − R). Thus, the input state is as in (41), since V i = ∅ by (45).…”

Section: Error Analysismentioning

confidence: 99%

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Identification Over Quantum Broadcast Channels

Pereg¹,

Johannes²,

Deppe³

2022

Preprint

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Identification over quantum broadcast channels is considered. As opposed to the information transmission task, the decoder only identifies whether a message of his choosing was sent or not. This relaxation allows for a doubleexponential code size. An achievable identification region is derived for a quantum broadcast channel, and full characterization for the class of classicalquantum broadcast channels. The results are demonstrated for a depolarizing broadcast channel. Furthermore, the identification capacity region of the single-mode pure-loss bosonic broadcast channel is obtained as a consequence. In contrast to the single-user case, the capacity region for identification can be significantly larger than for transmission.

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Section: Error Analysismentioning

confidence: 99%

“…Quantum broadcast channels were studied in various settings [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46]. Yard et al [31] derived the superposition inner bound and determined the capacity region for the degraded classical-quantum broadcast channel.…”

Section: Introductionmentioning

confidence: 99%

Identification Over Quantum Broadcast Channels

Pereg¹,

Johannes²,

Deppe³

2022

Preprint

Self Cite

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“…Secrecy in the form of quantum state masking was recently considered in [63]. Quantum broadcast channels were studied in various settings as well, e.g., [64][65][66][67][68][69][70][71][72][73][74]. Yard et al [64] derived the superposition inner bound and determined the capacity region for the degraded classical-quantum broadcast channel.…”

mentioning

confidence: 99%

Key Assistance, Key Agreement, and Layered Secrecy for Bosonic Broadcast Channels

Pereg¹,

Ferrara²,

Bloch³

2021

Preprint

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Secret-sharing building blocks based on quantum broadcast communication are studied. The confidential capacity region of the pure-loss bosonic broadcast channel is determined, both with and without key assistance, and an achievable region is established for the lossy bosonic broadcast channel. If the main receiver has a transmissivity of η < 1 2 , then confidentiality solely relies on the key-assisted encryption of the one-time pad. We also address conference key agreement for the distillation of two keys, a public key and a secret key. A regularized formula is derived for the key-agreement capacity region in finite dimensions. In the bosonic case, the key-agreement region is included within the capacity region of the corresponding broadcast channel with confidential messages. We then consider a network with layered secrecy, where three users with different security ranks communicate over the same broadcast network. We derive an achievable layered-secrecy region for a pure-loss bosonic channel that is formed by the concatenation of two beam splitters.

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Identification over quantum broadcast channels

Rosenberger,

Deppe,

Pereg

2023

Quantum Inf Process

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Identification over quantum broadcast channels is considered. As opposed to the information transmission task, the decoder only identifies whether a message of his choosing was sent or not. This relaxation allows for a double-exponential code size. An achievable identification region is derived for a quantum broadcast channel, and a full characterization for the class of classical-quantum broadcast channels. The identification capacity region of the single-mode pure-loss bosonic broadcast channel is obtained as a consequence. Furthermore, the results are demonstrated for the quantum erasure broadcast channel, where our region is suboptimal, but improves on the best previously known bounds.

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The broadcast classical–quantum capacity region of a two-phase bidirectional relaying channel

Cited by 4 publications

References 44 publications

Identification Over Quantum Broadcast Channels

Identification Over Quantum Broadcast Channels

Key Assistance, Key Agreement, and Layered Secrecy for Bosonic Broadcast Channels

Identification over quantum broadcast channels

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