160 citations · 275 across the 12 of their papers we have counts for
12 papers
Fundamental bounds for parameter estimation with few measurements
Valentin Gebhart, Manuel Gessner, Augusto Smerzi
Bounding the optimal precision in parameter estimation tasks is of central importance for technological applications. In the regime of a small number of measurements, or that of lo…
Entanglement Harvesting from Electromagnetic Quantum Fields
Frieder Lindel, Alexa Herter, Valentin Gebhart +2
In many states of the quantum electromagnetic field, including the vacuum state, entanglement exists between different space-time regions -- even space-like separated ones. These c…
Creating nonlocality using geometric phases between partially distinguishable photons
Valentin Gebhart
The geometric (Berry-Pancharatnam) phase originates from the intrinsic geometry of the space of quantum states and can be observed in different situations, such as a cyclic evoluti…
Coincidence postselection for genuine multipartite nonlocality: Causal diagrams and threshold efficiencies
Valentin Gebhart, Augusto Smerzi
Genuine multipartite nonlocality (GMN), the strongest form of multipartite nonlocality that describes fully collective nonlocal correlations among all experimental parties, can be…
Extending the fair sampling assumption using causal diagrams
Valentin Gebhart, Augusto Smerzi
Discarding undesirable measurement results in Bell experiments opens the detection loophole that prevents a conclusive demonstration of nonlocality. As closing the detection loopho…
Learning Quantum Systems
Valentin Gebhart, Raffaele Santagati, Antonio Andrea Gentile +7
The future development of quantum technologies relies on creating and manipulating quantum systems of increasing complexity, with key applications in computation, simulation and se…
Genuine multipartite nonlocality with causal-diagram postselection
Valentin Gebhart, Luca Pezzè, Augusto Smerzi
The generation and verification of genuine multipartite nonlocality (GMN) is of central interest for both fundamental research and quantum technological applications, such as quant…
Identifying nonclassicality from experimental data using artificial neural networks
Valentin Gebhart, Martin Bohmann, Karsten Weiher +4
The fast and accessible verification of nonclassical resources is an indispensable step towards a broad utilization of continuous-variable quantum technologies. Here, we use machin…
Bayesian Quantum Multiphase Estimation Algorithm
Valentin Gebhart, Augusto Smerzi, Luca Pezzè
Quantum phase estimation (QPE) is the key subroutine of several quantum computing algorithms as well as a central ingredient in quantum computational chemistry and quantum simulati…
Quantifying Computational Advantage of Grover's Algorithm with the Trace Speed
Valentin Gebhart, Luca Pezzè, Augusto Smerzi
Despite intensive research, the physical origin of the speed-up offered by quantum algorithms remains mysterious. No general physical quantity, like, for instance, entanglement, ca…
Topological transition in measurement-induced geometric phases
Valentin Gebhart, Kyrylo Snizhko, Thomas Wellens +3
The state of a quantum system, adiabatically driven in a cycle, may acquire a measurable phase depending only on the closed trajectory in parameter space. Such geometric phases are…
Casimir-Polder interaction of neutrons with metal or dielectric surfaces
Valentin Gebhart, Juliane Klatt, Gunther Cronenberg +2
We predict a repulsive Casimir-Polder-type dispersion interaction between a single neutron and a metal or dielectric surface. We consider a scenario where a single neutron is subje…