19 citations · 103 across the 17 of their papers we have counts for
18 papers
Strong converse rate for asymptotic hypothesis testing in type III
Marius Junge, Nicholas Laracuente
We extend from the hyperfinite setting to general von Neumann algebras Mosonyi and Ogawa's (2015) and Mosonyi and Hiai's (2023) results showing the operational interpretation of sa…
Information Fragility or Robustness Under Quantum Channels
Nicholas Laracuente, Graeme Smith
Quantum states naturally decay under noise. Many earlier works have quantified and demonstrated lower bounds on the decay rate, showing exponential decay in a wide variety of conte…
Entropy Uncertainty Relations and Strong Sub-additivity of Quantum Channels
Li Gao, Marius Junge, Nicholas LaRacuente
We prove an entropic uncertainty relation for two quantum channels, extending the work of Frank and Lieb for quantum measurements. This is obtained via a generalized strong super-a…
Relative entropy decay and complete positivity mixing time
Li Gao, Marius Junge, Nicholas LaRacuente +1
We prove that the complete modified logarithmic Sobolev constant of a quantum Markov semigroup is bounded by the inverse of its complete positivity mixing time. For classical Marko…
Self-restricting Noise and Exponential Relative Entropy Decay Under Unital Quantum Markov Semigroups
Nicholas LaRacuente
States of open quantum systems often decay continuously under environmental interactions. Quantum Markov semigroups model such processes in dissipative environments. It is known th…
Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation
Nicholas LaRacuente, Kaitlin N. Smith, Poolad Imany +2
A core challenge for superconducting quantum computers is to scale up the number of qubits in each processor without increasing noise or cross-talk. Distributed quantum computing a…
Quantum Oracle Separations from Complex but Easily Specified States
Nicholas LaRacuente
A foundational question in quantum computational complexity asks how much more useful a quantum state can be in a given task than a comparable, classical string. Aaronson and Kuper…
Multivariate Trace Inequalities, p-Fidelity, and Universal Recovery Beyond Tracial Settings
Marius Junge, Nicholas LaRacuente
Trace inequalities are general techniques with many applications in quantum information theory, often replacing classical functional calculus in noncommutative settings. The physic…
Graph Hörmander Systems
Haojian Li, Marius Junge, Nicholas LaRacuente
This paper extends the Bakry-Émery theorem connecting the Ricci curvature and log-Sobolev inequalities to the matrix-valued setting. Using tools from noncommuative geometry, it is…
Quasi-factorization and Multiplicative Comparison of Subalgebra-Relative Entropy
Nicholas LaRacuente
Purely multiplicative comparisons of quantum relative entropy are desirable but challenging to prove. We show such comparisons for relative entropies between comparable densities,…
Stability of logarithmic Sobolev inequalities under a noncommutative change of measure
Marius Junge, Nicholas LaRacuente, Cambyse Rouzé
We generalize Holley-Stroock's perturbation argument from commutative to quantum Markov semigroups. As a consequence, results on (complete) modified logarithmic Sobolev inequalitie…
Relative entropy for von Neumann subalgebras
Li Gao, Marius Junge, Nicholas LaRacuente
We revisit the connection between index and relative entropy for an inclusion of finite von Neumann algebras. We observe that the Pimsner-Popa index connects to sandwiched Renyi $p…
Group transference techniques for the estimation of the decoherence times and capacities of quantum Markov semigroups
Ivan Bardet, Marius Junge, Nicholas LaRacuente +2
Capacities of quantum channels and decoherence times both quantify the extent to which quantum information can withstand degradation by interactions with its environment. However,…
Fisher Information and Logarithmic Sobolev Inequality for Matrix Valued Functions
Li Gao, Marius Junge, Nicolas LaRacuente
We prove a version of Talagrand's concentration inequality for subordinated sub-Laplacian on a compact Riemannian manifold using tools from noncommutative geometry. As an applicati…
Unifying Entanglement with Uncertainty via Symmetries of Observable Algebras
Li Gao, Marius Junge, Nicholas LaRacuente
Strong subadditivity goes beyond the tensored subsystem and commuting operator models. As previously noted by Petz and later by Araki and Moriya, two subalgebras of observables sat…
Heralded Channel Holevo Superadditivity Bounds from Entanglement Monogamy
Li Gao, Marius Junge, Nicholas LaRacuente
We show that for a particular class of quantum channels, which we call heralded channels, monogamy of squashed entanglement limits the superadditivity of Holevo capacity. Heralded…
Capacity Estimates via comparison with TRO channels
Li Gao, Marius Junge, Nicholas LaRacuente
A ternary ring of operators (TRO) in finite dimensions is a diagonal sum of spaces of rectangular matrices. TRO as operator space corresponds to quantum channels that are diagonal…
Capacity Bounds via Operator Space Methods
Li Gao, Marius Junge, Nicholas LaRacuente
Quantum capacity, as the ultimate transmission rate of quantum communication, is characterized by regularized coherent information. In this work, we reformulate approximations of t…