102 citations · 1.9k across the 98 of their papers we have counts for
13 papers · 1 filter
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…
Random purification channel made simple
Filippo Girardi, Francesco Anna Mele, Ludovico Lami
The recently introduced random purification channel, which converts i.i.d. copies of any mixed quantum state into a uniform convex combination of i.i.d. copies of its purif…
A doubly composite Chernoff-Stein lemma and its applications
Ludovico Lami
Given a sequence of random variables , discriminating between two hypotheses on the underlying probability distribution is a key task in statistics and informa…
Generalised quantum Sanov theorem revisited
Ludovico Lami
Given two families of quantum states and , called the null and the alternative hypotheses, quantum hypothesis testing is the task of determining whether an unknown quantum s…
Optimising quantum data hiding
Francesco Anna Mele, Ludovico Lami
Quantum data hiding is the existence of pairs of bipartite quantum states that are (almost) perfectly distinguishable with global measurements, yet close to indistinguishable when…
Fundamental Quality Bound on Optical Quantum Communication
Tobias Rippchen, Ludovico Lami, Gerardo Adesso +1
Sending quantum information reliably over long distances is a central challenge in quantum technology in general, and in quantum optics in particular, since most quantum communicat…
Near-optimal performance of square-root measurement for general score functions and quantum ensembles
Hemant K. Mishra, Ludovico Lami, Mark M. Wilde
The Barnum-Knill theorem states that the optimal success probability in the multiple state discrimination task is not more than the square root of the success probability when the…
Extracting energy via bosonic Gaussian operations
Frank Ernesto Quintela Rodriguez, Francesco Anna Mele, Salvatore Francesco Emanuele Oliviero +3
Quantum thermodynamics is often formulated as a theory with constrained access to operations and resources. In this manuscript, we find a closed formula for the Gaussian ergotropy,…
Quantum umlaut information
Filippo Girardi, Aadil Oufkir, Bartosz Regula +3
We study the quantum umlaut information, a correlation measure defined for bipartite quantum states as a reversed variant of the quantum mutual information: $U(A;B)_ρ= \mi…
Umlaut information
Filippo Girardi, Aadil Oufkir, Bartosz Regula +3
The sphere-packing bound quantifies the error exponent for noisy channel coding for rates above a critical value. Here, we study the zero-rate limit of the sphere-packing bound and…
Tight relations and equivalences between smooth relative entropies
Bartosz Regula, Ludovico Lami, Nilanjana Datta
The precise one-shot characterisation of operational tasks in classical and quantum information theory relies on different forms of smooth entropic quantities. A particularly impor…