98 citations · 146 across the 12 of their papers we have counts for
12 papers
Lie-Algebraic Classical Simulation of Bosonic Systems Beyond Gaussian Dynamics
Adelina Bärligea, Timothy Heightman, Jakob S. Kottmann +1
Classical simulability is ultimately determined by both the dynamics of a quantum system and the observables being evaluated. Lie-algebraic simulation exploits the latter to make e…
Moment Optimization in the Navascués-Pironio-Acín Hierarchy
Francesco Flora, Losel Matos, Tim Heightman +3
The Navascués-Pironio-Acín (NPA) hierarchy provides a convergent sequence of semidefinite programming (SDP) relaxations for noncommutative polynomial optimisation, ubiquitous in qu…
Swap Network Augmented Ansätze on Arbitrary Connectivity
Teodor Parella-Dilmé, Jakob S. Kottmann, Antonio Acín
Efficient parametrizations of quantum states are essential for trainable hybrid classical-quantum algorithms. A key challenge in their design consists in adapting to the available…
Solving The Quantum Many-Body Hamiltonian Learning Problem with Neural Differential Equations
Timothy Heightman, Edward Jiang, Antonio Acín
Understanding and characterising quantum many-body dynamics remains a significant challenge due to both the exponential complexity required to represent quantum many-body Hamiltoni…
Improved finite-size key rates for discrete-modulated continuous variable quantum key distribution under coherent attacks
Carlos Pascual-García, Stefan Bäuml, Mateus Araújo +2
Continuous variable quantum key distribution (CVQKD) with discrete modulation combines advantages of CVQKD, such as the implementability using readily available technologies, with…
Boosting projective methods for quantum process and detector tomography
Júlia Barberà-Rodríguez, Leonardo Zambrano, Antonio Acín +1
We introduce two methods for quantum process and detector tomography. In the quantum process tomography method, we develop an analytical procedure for projecting the linear inversi…
Qudit-inspired optimization for graph coloring
David Jansen, Timothy Heightman, Luke Mortimer +2
We introduce a quantum-inspired algorithm for graph coloring problems (GCPs) that utilizes qudits in a product state, with each qudit representing a node in the graph and parameter…
Realistic Bell tests with homodyne measurements
Enky Oudot, Gaël Massé, Xavier Valcarce +1
We analyze Bell inequalities violations in photonic experiments for which the measurement apparatuses are restricted to homodyne measurements. Through numerical optimization of the…
Device-Independent Quantum Key Distribution beyond qubits
Javier Rivera-Dean, Anna Steffinlongo, Neil Parker-Sánchez +2
Device-Independent Quantum Key Distribution (DIQKD) aims to generate secret keys between two parties without relying on trust in their employed devices, imposing strict noise const…
Reducing Entanglement With Physically-Inspired Fermion-To-Qubit Mappings
Teodor Parella-Dilmé, Korbinian Kottmann, Leonardo Zambrano +3
In ab-initio electronic structure simulations, fermion-to-qubit mappings represent the initial encoding step of the fermionic problem into qubits. This work introduces a physically…
Unsupervised mapping of phase diagrams of 2D systems from infinite projected entangled-pair states via deep anomaly detection
Korbinian Kottmann, Philippe Corboz, Maciej Lewenstein +1
We demonstrate how to map out the phase diagram of a two dimensional quantum many body system with no prior physical knowledge by applying deep \textit{anomaly detection} to ground…
Local hidden--variable models for entangled quantum states
Remigiusz Augusiak, Maciej Demianowicz, Antonio Acín
While entanglement and violation of Bell inequalities were initially thought to be equivalent quantum phenomena, we now have different examples of entangled states whose correlatio…