Quantum Lab

Over the past few years, various methods have been developed to engineeer and to exploit the dynamics of photonic quantum states as they evolve through linear optical networks. Recent theoretical works have shown that the underlying Lie algebraic structure plays a crucial role in the description of linear optical Hamiltonians, as such formalism identifies intrinsic … Continua a leggere

Linear optical architectures have been extensively investigated for quantum computing and quantum machine learning applications. Recently, proposals for photonic quantum machine learning have combined linear optics with resource adaptivity, such as adaptive circuit reconfiguration, which promises to enhance expressivity and improve algorithm performances and scalability. Moreover, linear optical platforms preserve some subspaces due to the … Continua a leggere

On 27 March 2025, Beatrice Polacchi will give a talk at the workshop “QIA & Quantum Punks: New Applications for the Quantum Internet” at the Quantum Information Center Sorbonne (QICS), Sorbonne University of Paris, organized by Veriqloud and Deep Quantum, in partnership with the Use Case Team of the Quantum Internet Alliance.The talk will be … Continua a leggere

The researchers of the Quantum Lab Beatrice, Taira, and Valeria will take part in the event “She rocks science”  on March 13th at the Marconi building of Physics Department.The event is part of a series that aims to give visibility to the women researchers of the Physics Department of Sapienza University to celebrate the International Day … Continua a leggere

Fabio Sciarrino, Venerdì 14 marzo, parteciperà all’Open Day Cagliari DLAB per parlare dell’importanza delle tecnologie quantistiche e dei nuovi scenari ai fini dell’innovazione, della sicurezza informatica e dello sviluppo tecnologico. Link: https://portalecte.mimit.gov.it/index.php/cte/32-cagliari/44-blog/347-open-day-cte-cagliari-digital-lab

Quantum memristors represent a promising interface between quantum and neuromorphic computing, combining the nonlinear, memory-dependent behavior of classical memristors with the properties of quantum states. An optical quantum memristor can be realized with a vacuum–one-photon qubit entering a tunable beam splitter whose reflectivity is adapted according to the mean number of photons in the device. … Continua a leggere

The POQUB project, “PhOtonics QUantum Bernoulli Factory,” led by Fabio Sciarrino as Principal Investigator, started on 1 March 2025.POQUB is hosted by Quantum Lab, Department of Physics – Sapienza (https://www.quantumlab.it/), and will also involve the National Quantum Science and Technology Institute (NQSTI) (https://nqsti.it/) for the activities of technology transfer and for the interactions with the … Continua a leggere

The estimation of properties of quantum states — such as entanglement — is a core need for the development of quantum technologies, yet remaining a demanding challenge. Standard approaches to property estimation rely on the modeling of the measurement apparatus and, often, a priori assumptions on their working principles. Even small deviations can greatly affect … Continua a leggere

Traditional quantum metrology assesses precision using the figures of merit of continuous-valued parameter estimation. Recently, quantum digital estimation was introduced: it evaluates the performance information theoretically by quantifying the number of significant bits of the parameter, redefining key benchmarks like the Heisenberg bound. Here, we report the first experimental realization of a Quantum Analog-to-Digital Converter … Continua a leggere