101 citations · 313 across the 26 of their papers we have counts for
27 papers
Certifying and learning local quantum Hamiltonians
Andreas Bluhm, Matthias C. Caro, Francisco Escudero Gutiérrez +4
In this work, we study the problems of certifying and learning quantum -local Hamiltonians, for a constant . Our main contributions are as follows: - Certification of Hamilto…
Inclusion constants for free spectrahedra with applications to quantum incompatibility
Andreas Bluhm, Eric Evert, Igor Klep +2
Building on the matrix cube problem, inclusions of free spectrahedra have been used successfully to obtain relaxations of hard spectrahedral inclusion problems. The quality of such…
Random measurements are almost maximally incompatible
Andreas Bluhm, Cécilia Lancien, Ion Nechita
In this work, we investigate the incompatibility of random quantum measurements. Most previous work has focused on characterizing the maximal amount of white noise that any fixed n…
Axion generation and detection in laser-plasma wakefields
Xiangyan An, Min Chen, Jianglai Liu +4
The axions are compelling candidates for cold dark matter, but their extremely weak interaction with photons makes laboratory searches challenging. We show that the quasi-static el…
Belavkin-Staszewski Quantum Markov Chains
Andreas Bluhm, Ángela Capel, Pablo Costa Rico +1
It is well-known that the conditional mutual information of a quantum state is zero if, and only if, the quantum state is a quantum Markov chain. Replacing the Umegaki relative ent…
On the simulation of quantum multimeters
Andreas Bluhm, Leevi Leppäjärvi, Ion Nechita
In the quest for robust and universal quantum devices, the notion of simulation plays a crucial role, both from a theoretical and from an applied perspective. In this work, we go b…
Strong decay of correlations for Gibbs states in any dimension
Andreas Bluhm, Ángela Capel, Antonio Pérez-Hernández
Quantum systems in thermal equilibrium are described using Gibbs states. The correlations in such states determine how difficult it is to describe or simulate them. In this article…
Unified framework for continuity of sandwiched Rényi divergences
Andreas Bluhm, Ángela Capel, Paul Gondolf +1
In this work, we prove uniform continuity bounds for entropic quantities related to the sandwiched Rényi divergences such as the sandwiched Rényi conditional entropy. We follow thr…
Learning and simulating bosonic systems via finite-energy locality
Tim Möbus, Andreas Bluhm, Matthias C. Caro +2
Bosonic devices promise applications in simulation, sensing and quantum error correction, but infinite-dimensional local Hilbert spaces obstruct the locality tools that make qubit…
Going Beyond Gadgets: The Importance of Scalability for Analogue Quantum Simulators
Dylan Harley, Ishaun Datta, Frederik Ravn Klausen +4
Quantum hardware has the potential to efficiently solve computationally difficult problems in physics and chemistry to reap enormous practical rewards. Analogue quantum simulation…
General Continuity Bounds for Quantum Relative Entropies
Andreas Bluhm, Ángela Capel, Paul Gondolf +1
In this article, we generalize a proof technique by Alicki, Fannes and Winter and introduce a method to prove continuity bounds for entropic quantities derived from different quant…
Polytope compatibility -- from quantum measurements to magic squares
Andreas Bluhm, Ion Nechita, Simon Schmidt
Several central problems in quantum information theory (such as measurement compatibility and quantum steering) can be rephrased as membership in the minimal matrix convex set corr…
Continuity of quantum entropic quantities via almost convexity
Andreas Bluhm, Ángela Capel, Paul Gondolf +1
Based on the proofs of the continuity of the conditional entropy by Alicki, Fannes, and Winter, we introduce in this work the almost locally affine (ALAFF) method. This method allo…
A tensor norm approach to quantum compatibility
Andreas Bluhm, Ion Nechita
Measurement incompatibility is one of the most striking examples of how quantum physics is different from classical physics. Two measurements are incompatible if they cannot arise…
Landauer vs. Nernst: What is the True Cost of Cooling a Quantum System?
Philip Taranto, Faraj Bakhshinezhad, Andreas Bluhm +9
Thermodynamics connects our knowledge of the world to our capability to manipulate and thus to control it. This crucial role of control is exemplified by the third law of thermodyn…
Maximal violation of steering inequalities and the matrix cube
Andreas Bluhm, Ion Nechita
In this work, we characterize the amount of steerability present in quantum theory by connecting the maximal violation of a steering inequality to an inclusion problem of free spec…
A single-qubit position verification protocol that is secure against multi-qubit attacks
Andreas Bluhm, Matthias Christandl, Florian Speelman
The position of a device or agent is an important security credential in today's society, both online and in the real world. Unless in direct proximity, however, the secure verific…
Exponential decay of mutual information for Gibbs states of local Hamiltonians
Andreas Bluhm, Ángela Capel, Antonio Pérez-Hernández
The thermal equilibrium properties of physical systems can be described using Gibbs states. It is therefore of great interest to know when such states allow for an easy description…
Weak quasi-factorization for the Belavkin-Staszewski relative entropy
Andreas Bluhm, Ángela Capel, Antonio Pérez-Hernández
Quasi-factorization-type inequalities for the relative entropy have recently proven to be fundamental in modern proofs of modified logarithmic Sobolev inequalities for quantum spin…
Programmability of covariant quantum channels
Martina Gschwendtner, Andreas Bluhm, Andreas Winter
A programmable quantum processor uses the states of a program register to specify one element of a set of quantum channels which is applied to an input register. It is well-known t…
Incompatibility in general probabilistic theories, generalized spectrahedra, and tensor norms
Andreas Bluhm, Anna Jenčová, Ion Nechita
In this work, we investigate measurement incompatibility in general probabilistic theories (GPTs). We show several equivalent characterizations of compatible measurements. The firs…
A strengthened data processing inequality for the Belavkin-Staszewski relative entropy
Andreas Bluhm, Angela Capel
In this work, we provide a strengthening of the data processing inequality for the relative entropy introduced by Belavkin and Staszewski (BS-entropy). This extends previous result…
Compatibility of quantum measurements and inclusion constants for the matrix jewel
Andreas Bluhm, Ion Nechita
In this work, we establish the connection between the study of free spectrahedra and the compatibility of quantum measurements with an arbitrary number of outcomes. This generalize…
Joint measurability of quantum effects and the matrix diamond
Andreas Bluhm, Ion Nechita
In this work, we investigate the joint measurability of quantum effects and connect it to the study of free spectrahedra. Free spectrahedra typically arise as matricial relaxations…