A5075919196- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Quantum optics and atomic interactions
- Neural Networks and Reservoir Computing
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Thermodynamics and Statistical Mechanics
- Neural dynamics and brain function
- Orbital Angular Momentum in Optics
- CCD and CMOS Imaging Sensors
- Statistical Mechanics and Entropy
- Conducting polymers and applications
- Paranormal Experiences and Beliefs
- Hydrogels: synthesis, properties, applications
- Quantum and electron transport phenomena
- Advanced Optical Sensing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Spectroscopy Techniques in Biomedical and Chemical Research
- Philosophy and History of Science
- Spectroscopy and Quantum Chemical Studies
- Cold Atom Physics and Bose-Einstein Condensates
Sapienza University of Rome
2011-2024
Universidade Federal do ABC
2022
Leiden University
2011
National Institute of Optics
2011
Enrico Fermi Center for Study and Research
2011
Istituto Nazionale per la Fisica della Materia
2002
Phase estimation has applications from quantum imaging to gravitational-wave detection. In areas such as biological-system sampling or metrology, it is crucial optimally acquire information a very limited number of probes. To address this need, the authors describe and experimentally verify machine-learning method for optimal adaptive single-photon phase based on small trials. This approach could be used optimize metrology protocols, can extended general multiparameter scenarios.
Abstract The launch of a satellite capable distributing entanglement through long distances and the first loophole-free violation Bell inequalities are milestones indicating clear path for establishment quantum networks. However, nonlocality in networks with independent sources has only been experimentally verified simple tripartite networks, via bilocality inequalities. Here, by using scalable photonic platform, we implement star-shaped consisting up to five distant nodes four sources. We...
Since Bell's theorem, it is known that local realism fails to explain quantum phenomena. Bell inequality violations manifestly show the incompatibility of theory with classical notions cause and effect. As recently found, however, instrumental scenario-a pivotal tool in causal inference-allows for nonclassicality signatures going beyond this paradigm. If we are not limited observational data can intervene our setup, then witness bounds on influence among involved variables even when no...
Abstract In a Bell experiment, it is natural to seek causal account of correlations wherein only common cause acts on the outcomes. For this structure, inequality violations can be explained if dependencies are modeled as intrinsically quantum. There also exists vast landscape structures beyond that witness nonclassicality, in some cases without even requiring free external inputs. Here, we undertake photonic experiment realizing one such example: triangle network, consisting three...
We report the experimental realization of a recently discovered quantum-information protocol by Peres implying an apparent nonlocal quantum mechanical retrodiction effect. The demonstration is carried out optical method which each singlet entangled state physically implemented two-dimensional subspace Fock states mode electromagnetic field, specifically space spanned vacuum and one-photon state, along lines suggested E. Knill et al. [Nature (London) 409, 46 (2001)] M. Duan [ibid. 414, 413 (2001)].
Abstract The combination of conducting polymers and hydrogels in a conductive interpenetrated polymer network (CIPN) is an interesting strategy to mimic muscles create bending actuators. Whereas the ensures electro pulse flux, hydrogel provides structural support similar human tissues. In this work, poly(acrylic acid) (PAA) polypyrrole (PPy) CIPNs were synthesized aqueous solution three different compositions characterized terms their morphology, composition, mechanical, electrochemical...
The wave or particle duality has long been considered a fundamental signature of the nonclassical behavior quantum phenomena, especially in delayed choice experiment, where experimental setup revealing either nature system is decided after entered apparatus. However, as counterintuitive it might seem, usual experiments do have simple causal explanation. Here, we take different route and under natural assumption about dimensionality examination, present an proof nonclassicality experiment...
Universal blind quantum computing allows users with minimal resources to delegate a computation remote server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such protocol have only involved one client. However, an increasing number multi-party algorithms, e.g. federated machine learning, require the collaboration multiple clients carry out given joint computation. In this work, we propose experimentally demonstrate lightweight...
We propose a paradigmatic demonstration of the potentialities deformable mirror for closed-loop control two-photon momentum-entangled state, subject to phase fluctuations. A custom-made membrane is used set relative shift between arms an interferometric apparatus. The algorithm estimates quantum by measurements coincidence events at output ports interferometer, and uses results provide feedback signal mirror. Stabilization rate within 1.5 standard deviation Poissonian noise demonstrated over...
Full characterization of quantum states and processes is a fundamental requirement for verification benchmarking devices. It has been realized in systems with few components, but larger it becomes unfeasible because the exponential growing system size number measurements amount computational power required to process them. A new approach state tomography tomography, requiring limited measurements, recently introduced by Maciel et al. [Quantum Inf. Comput. 12, 0442 (2012); Int. J. Mod. Phys....
Blind quantum computing (BQC) was only demonstrated in single-client scenarios. Here, we design a versatile multi-client BQC on linear network and demonstrate it two-client setting an adaptive photonic platform.
A custom‐made membrane mirror is used was for compensation of the thermal phase instabilities a two‐photon path entangled state. Stabilization coincidence rate to within 1.5 standard deviation Poissonian noise demonstrated over 2000 seconds.
The realization of the optical stochastic (or nonstationary) field interferometer (Sto-IF) is reported. By this device, whose properties are determined by those beam splitter (Sto-BS), relevant Bose-Einstein correlations generated within investigated particle field. A very general quantum theory Sto-BS and Sto-IF Because it accounts for any distribution function driving field, embodies formal content results previous interferometry theories. All theoretical substantiated an experiment...
Using a flexible and scalable photonic platform, we implement star-shaped quantum network with five nodes truly independent sources, violate n -locality inequality to device-independently witness nonlocal correlations in the whole network.
We implement a binary-variable instrumental scenario on photonic setup. Despite no Bell-like inequality exists for this model, we detect non-classical correlations by quantifying causal influences, which allows demonstrating discrepancies between quantum and classical predictions.
Universal blind quantum computing allows users with minimal resources to delegate a computation remote server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such protocol have only involved one client. However, an increasing number multi-party algorithms, e.g. federated machine learning, require the collaboration multiple clients carry out given joint computation. In this work, we propose experimentally demonstrate lightweight...
We implement triangle causal structures in photonics platforms and detect different forms of nonlocality. In particular, we focused on the Genuine Multipartite Non-locality nonlocality exhibited a network without freedom choice.
We implement adaptive machine learning techniques to enhance the sensitivity in estimation of a relative phase shift between two paths an interferometer. The is realized through single photons measured shot by shot.
In a Bell experiment, it is natural to seek causal account of correlations wherein only common cause acts on the outcomes. For this structure, inequality violations can be explained if dependencies are modelled as intrinsically quantum. There also exists vast landscape structures beyond that witness nonclassicality, in some cases without even requiring free external inputs. Here, we undertake photonic experiment realizing one such example: triangle network, consisting three measurement...
The incompatibility between the quantum and classical notion of causality is a well known result in theory. Using photonic platform we show that, going beyond Bell's scenario, can detect nonclassicality even when no violation possible, by intervening our experimental apparatus.