9 citations · 16 across the 13 of their papers we have counts for
9 papers · 1 filter
Parallel classical simulation of noisy shallow circuits: no quantum advantage in 1D
Robert Koenig, Marco Tomamichel
We consider quantum circuits consisting of layers of nearest-neighbor two-qubit gates acting on qubits arranged on a line, where every qubit is independently depolarized wi…
Making the most of leftovers: Improved privacy amplification for quantum key distribution
Matthew Simon Tan, Bartosz Regula, Marco Tomamichel
The amount of secret key that can be obtained from a quantum key distribution run depends on both the physically observed error rates and the mathematical bounds used to certify se…
The exact strong converse exponent for private communication over quantum channels
Hao-Chung Cheng, Christoph Hirche, Marco Tomamichel
We determine the exact strong converse exponent for secret-key transmission and generation over general finite-dimensional quantum wiretap channels, measuring reliability and secre…
Strong Converses for Quantum Channel Capacities from Blowing-Up Lemmata
Salman Beigi, Marco Tomamichel
A quantum channel can transmit quantum states, classical messages, or classical messages that remain secret from its environment. We prove exponential strong converses for all thre…
A strong converse for stabilizer codes over Pauli channels via the blowing-up lemma
Marco Tomamichel
We prove a strong converse for quantum communication over Pauli channels within the class of stabilizer codes. If a code whose code space is a full joint eigenspace of a stabilizer…
Reliability of asymptotic work extraction
Kaito Watanabe, Bartosz Regula, Marco Tomamichel +1
Extracting work from quantum states is a fundamental task in quantum thermodynamics. Previous studies have primarily focused on determining the best achievable rate of work extract…
Learning Pure Quantum States in Any Dimension (Almost) Without Regret
Josep Lumbreras, Marco Tomamichel
We extend quantum state tomography with minimal cumulative disturbance, first investigated in [arXiv:2406.18370], to arbitrary finite-dimensional pure states. A learner sequentiall…
Tight Contraction Rates for Primitive Channels under Quantum -Divergences
Matthew Simon Tan, Marco Tomamichel, Ian George
Data-processing inequalities capture the phenomenon that two probability distributions can only become less distinguishable under any common post-processing. For more fine-grained…
Rethinking quantum smooth entropies: Tight one-shot analysis of quantum privacy amplification
Bartosz Regula, Marco Tomamichel
We introduce an improved one-shot characterisation of randomness extraction against quantum side information (privacy amplification), strengthening known one-shot bounds and provid…