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View article: Demonstration of hardware efficient photonic variational quantum algorithm
Demonstration of hardware efficient photonic variational quantum algorithm Open
Quantum computing has changed the paradigm of computer science, where quantum technologies have promised to outperform classical ones. Such an advantage was only demonstrated for tasks with no application or out of reach for the state-of-t…
View article: Experimental data re-uploading with provable enhanced learning capabilities
Experimental data re-uploading with provable enhanced learning capabilities Open
The last decades have seen the development of quantum machine learning, stemming from the intersection of quantum computing and machine learning. This field is particularly promising for the design of alternative quantum (or quantum inspir…
View article: Experimental quantum-enhanced kernel-based machine learning on a photonic processor
Experimental quantum-enhanced kernel-based machine learning on a photonic processor Open
Recently, machine learning has had remarkable impact in scientific to everyday-life applications. However, complex tasks often require the consumption of unfeasible amounts of energy and computational power. Quantum computation may lower s…
View article: Experimental neuromorphic computing based on quantum memristor
Experimental neuromorphic computing based on quantum memristor Open
Machine learning has recently developed novel approaches, mimicking the synapses of the human brain to achieve similarly efficient learning strategies. Such an approach retains the universality of standard methods, while attempting to circ…
View article: Demonstration of Hardware Efficient Photonic Variational Quantum Algorithm
Demonstration of Hardware Efficient Photonic Variational Quantum Algorithm Open
Quantum computing has brought a paradigm change in computer science, where non-classical technologies have promised to outperform their classical counterpart. Such an advantage was only demonstrated for tasks without practical applications…
View article: Experimental quantum-enhanced kernels on a photonic processor
Experimental quantum-enhanced kernels on a photonic processor Open
Recently, machine learning had a remarkable impact, from scientific to everyday-life applications. However, complex tasks often imply unfeasible energy and computational power consumption. Quantum computation might lower such requirements,…
View article: Photonic implementation of quantum gravity simulator
Photonic implementation of quantum gravity simulator Open
Detecting gravity-mediated entanglement can provide evidence that the gravitational field obeys quantum mechanics. We report the result of a simulation of the phenomenon using a photonic platform. The simulation tests the idea of probing t…
View article: Experimental superposition of a quantum evolution with its time reverse
Experimental superposition of a quantum evolution with its time reverse Open
In the macroscopic world, time is intrinsically asymmetric, flowing in a specific direction, from past to future. However, the same is not necessarily true for quantum systems, as some quantum processes produce valid quantum evolutions und…
View article: Programmable multiphoton quantum interference in a single spatial mode
Programmable multiphoton quantum interference in a single spatial mode Open
The interference of nonclassical states of light enables quantum-enhanced applications reaching from metrology to computation. Most commonly, the polarization or spatial location of single photons are used as addressable degrees of freedom…
View article: Programmable multi-photon quantum interference in a single spatial mode -- Data and code for simulations
Programmable multi-photon quantum interference in a single spatial mode -- Data and code for simulations Open
Description of the data and file structure This Dataset contains data files with experimental results for the manuscript "Programmable multi-photon quantum interference in a single spatial mode" (pre-print version at https://arxiv.org/abs/…
View article: Machine-learning-based device-independent certification of quantum networks
Machine-learning-based device-independent certification of quantum networks Open
Witnessing nonclassical behavior is a crucial ingredient in quantum information processing. For that, one has to optimize the quantum features a given physical setup can give rise to, which is a hard computational task currently tackled wi…
View article: Experimental nonclassicality in a causal network without assuming freedom of choice
Experimental nonclassicality in a causal network without assuming freedom of choice Open
In a Bell experiment, it is natural to seek a causal account of correlations wherein only a common cause acts on the outcomes. For this causal structure, Bell inequality violations can be explained only if causal dependencies are modeled a…
View article: High-fidelity generation of four-photon GHZ states on-chip
High-fidelity generation of four-photon GHZ states on-chip Open
Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progresses have been reported in the generation of such quantum light states using free space apparatus, high-fidelity high-rate …
View article: Experimental superposition of time directions
Experimental superposition of time directions Open
In the macroscopic world, time is intrinsically asymmetric, flowing in a specific direction, from past to future. However, the same is not necessarily true for quantum systems, as some quantum processes produce valid quantum evolutions und…
View article: Experimental superposition of time directions
Experimental superposition of time directions Open
In the macroscopic world, time is intrinsically asymmetric, flowing in a specific direction, from past to future. However, the same is not necessarily true for quantum systems, as some quantum processes produce valid quantum evolutions und…
View article: Experimental nonclassicality in a causal network without assuming freedom of choice
Experimental nonclassicality in a causal network without assuming freedom of choice Open
In a Bell experiment, it is natural to seek a causal account of correlations wherein only a common cause acts on the outcomes. For this causal structure, Bell inequality violations can be explained only if causal dependencies are modelled …
View article: Experimental Genuine Tripartite Nonlocality in a Quantum Triangle Network
Experimental Genuine Tripartite Nonlocality in a Quantum Triangle Network Open
Quantum networks are the center of many of the recent advances in quantum science, not only leading to the discovery of new properties in the foundations of quantum theory but also allowing for novel communication and cryptography protocol…
View article: Photonic Implementation of Quantum Gravity Simulator
Photonic Implementation of Quantum Gravity Simulator Open
Detecting gravity mediated entanglement can provide evidence that the gravitational field obeys quantum mechanics. We report the result of a simulation of the phenomenon using a photonic platform. The simulation tests the idea of probing t…
View article: Experimental genuine tripartite nonlocality in a quantum triangle network
Experimental genuine tripartite nonlocality in a quantum triangle network Open
Quantum networks are the center of many of the recent advances in quantum science, not only leading to the discovery of new properties in the foundations of quantum theory but also allowing for novel communication and cryptography protocol…
View article: Experimental test of quantum causal influences
Experimental test of quantum causal influences Open
Since Bell’s theorem, it is known that local realism fails to explain quantum phenomena. Bell inequality violations manifestly show the incompatibility of quantum theory with classical notions of cause and effect. As recently found, howeve…
View article: Experimental test of quantum causal influences
Experimental test of quantum causal influences Open
Since Bell’s theorem, it is known that local realism fails to explain quantum phenomena. Bell inequality violations manifestly show the incompatibility of quantum theory with classical notions of cause and effect. As recently found, howeve…
View article: Causal Networks and Freedom of Choice in Bell’s Theorem
Causal Networks and Freedom of Choice in Bell’s Theorem Open
Bell's theorem is typically understood as the proof that quantum theory is incompatible with local-hidden-variable models. More generally, we can see the violation of a Bell inequality as witnessing the impossibility of explaining quantum …
View article: Experimental Robust Self-Testing of the State Generated by a Quantum Network
Experimental Robust Self-Testing of the State Generated by a Quantum Network Open
Self-testing is a method of quantum state and measurement estimation that\ndoes not rely on assumptions about the inner working of the used devices. Its\nexperimental realization has been limited to sources producing single quantum\nstates…
View article: Experimental device-independent certified randomness generation with an instrumental causal structure
Experimental device-independent certified randomness generation with an instrumental causal structure Open
The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers, a central challenge for a plethora of fields. Bell non-local correlations obtained by measurements on entangled states allow for the ge…
View article: Exclusivity graph approach to Instrumental inequalities
Exclusivity graph approach to Instrumental inequalities Open
Instrumental variables allow the estimation of cause and effect relations even in presence of unobserved latent factors, thus providing a powerful tool for any science wherein causal inference plays an important role. More recently, the in…
View article: Device-independent test of a delayed choice experiment
Device-independent test of a delayed choice experiment Open
The wave or particle duality has long been considered a fundamental signature of the nonclassical behavior of
\nquantum phenomena, especially in a delayed choice experiment, where the experimental setup revealing either the particle or the…
View article: Experimental Connection between the Instrumental and Bell Inequalities
Experimental Connection between the Instrumental and Bell Inequalities Open
An investigated process can be studied in terms of the causal relations among the involved variables, representing it as a causal model. Some causal models are particularly relevant, since they can be tested through mathematical constraint…