102 citations · 1.9k across the 98 of their papers we have counts for
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Entropic measures of quantum information
Roberto Rubboli, Bartosz Regula, Mario Berta +2
Entropy has played a pivotal role in physics ever since its inception by Clausius in the early industrial age. Shannon ushered the concept into the information age by using it to d…
Classical Capacity of Single-Mode Bosonic Gaussian Channels
Gerardo Adesso, Ludovico Lami, Vittorio Giovannetti
The classical capacity of a noisy optical channel is the maximum rate at which information can be transmitted reliably, given a constraint on the mean input energy. For the ubiquit…
Quantum information processing under maximal distance measures
Bartosz Regula, Ludovico Lami, Mario Berta +1
The measures of distance frequently used in quantum information, such as trace distance or fidelity-based purified distance, are the smallest extensions of the corresponding distan…
Discriminating Lindbladian Dynamics
Robert Salzmann, Ludovico Lami, Martin B. Plenio +1
The fundamental task of quantum hypothesis testing, which consists in discriminating quantum objects, has been extensively studied for quantum states and channels. Here, we investi…
A fully Gaussian quantum Stein's lemma
Filippo Girardi, Jacopo Rizzo, Leah Turner +2
A central yet mysterious problem in quantum information is the asymptotic distinguishability of quantum states under restricted measurements. Here we look at asymptotic asymmetric…
Universal Entanglement Distillation
Salvatore Tirone, Francesco Anna Mele, Vittorio Giovannetti +1
We present a universal entanglement distillation protocol that asymptotically achieves the distillable entanglement of any unknown bipartite state in a fixed finite dimension. That…
Universal quantum coding
Jacopo Rizzo, Ludovico Lami, Filippo Girardi +2
Entanglement distillation from noisy bipartite states and reliable quantum communication over noisy channels are fundamental tasks in quantum information theory. Yet existing codin…
Sharp pairwise reduction for quantum hypothesis testing
Kuan-Yi Lee, Ludovico Lami
We determine the optimal universal coefficient in a reduction of multiple to binary quantum hypothesis testing. Specifically, for every finite ensemble in any Hilbert space dimensi…
Generalised quantum Stein's lemma more robust than ever
Filippo Girardi, Kuan-Yi Lee, Masahito Hayashi +1
The generalised quantum Stein's lemma is a key result in quantum hypothesis testing, and connects this fundamental primitive of quantum information processing with quantum resource…
Sample complexity of quantum resource testing via one-shot quantum blurring
Dmitry Grinko, Ludovico Lami
Quantum resource testing is a fundamental primitive of quantum information processing, profoundly connected to resource manipulation. Its goal is to discriminate copies of a gi…
Entanglement of flower states
Samrat Sen, Ludovico Lami
The mysterious nature of entanglement, one of the most prominent exquisitely quantum phenomena, is reflected in its intricate operational structure, with a hierarchy of classes of…
Bosonic quantum communication beyond the thermal threshold
Francesco Anna Mele, Giuseppe Catalano, Marco Fanizza +2
The quantum capacity of the bosonic thermal attenuator, which is given by the regularization of its coherent information, is unknown. The seminal work of Holevo and Werner establis…
Sharp continuity of quantum conditional entropy
Mario Berta, Pablo Costa Rico, Gereon Kossmann +2
We prove the sharp uniform continuity bound for quantum conditional entropy. If two bipartite states are at trace distance at most and , the optimal dimension-only mo…
Optimal tomography of bosonic and fermionic Gaussian states
Senrui Chen, Marco Fanizza, Filippo Girardi +4
The sample complexity is the minimum number of copies required to learn an accurate classical description of a quantum state. Bosonic and fermionic Gaussian quantum states are fami…
Quantum Shannon theory made robust: a tale of three protocols for almost i.i.d. sources
Filippo Girardi, Nilanjana Datta, Giacomo De Palma +1
The asymptotic rates of information-theoretic protocols - including error exponents, data-compression rates, and channel capacities - are traditionally derived under the idealised…
Central Limit Theorem for Bosonic Quantum Channels
Hami Mehrabi, Ludovico Lami, Mark M. Wilde
In this paper, we develop an extension of the Central Limit Theorem (CLT) to the setting of bosonic quantum channels. This extension provides a deeper understanding of Gaussian bos…
Universal quantum resource distillation via composite generalised quantum Stein's lemma
Ludovico Lami, Bartosz Regula, Ryuji Takagi
The performance of quantum resource manipulation protocols, including key examples such as distillation of quantum entanglement, is measured in terms of the rate at which desired t…
New approaches to almost i.i.d. information theory
Filippo Girardi, Giacomo De Palma, Ludovico Lami
Independent and identically distributed (i.i.d.) states are ubiquitous in quantum information theory. However, in a practical setting, the i.i.d. assumption is too stringent, and p…
Efficiently Computable Strategies and Limits for Bosonic Channel Discrimination
Zixin Huang, Ludovico Lami, Vishal Singh +1
Discriminating between noisy quantum processes is a central primitive for quantum communication, metrology, and computing. While discrimination limits for finite-dimensional channe…
Optimal Discrimination of Gaussian States by Gaussian Measurements
Leah Turner, Ludovico Lami, Madalin Guta +1
Are Gaussian measurements enough to distinguish between Gaussian states? Here, we tackle this question by focusing on the max-relative entropy as an operational distinguishability…
Zero-Error List Decoding for Classical-Quantum Channels
Marco Dalai, Filippo Girardi, Ludovico Lami
The aim of this work is to study the zero-error capacity of pure-state classical-quantum channels in the setting of list decoding. We provide an achievability bound for list-size t…
Random purification channel for passive Gaussian bosons
Francesco Anna Mele, Filippo Girardi, Senrui Chen +2
The random purification channel, which, given copies of an unknown mixed state , prepares copies of an associated random purification, has proved to be an extremely valu…
The operator layer cake theorem is equivalent to Frenkel's integral formula
Hao-Chung Cheng, Gilad Gour, Ludovico Lami +1
The operator layer cake theorem provides an integral representation for the directional derivative of the operator logarithm in terms of a family of projections [arXiv:2507.06232].…
Random Stinespring superchannel: converting channel queries into dilation isometry queries
Filippo Girardi, Francesco Anna Mele, Haimeng Zhao +2
The recently introduced random purification channel, which converts copies of an arbitrary mixed quantum state into copies of the same uniformly random purification, has em…