Miguel Bello (MPQ) Setups of quantum emitters coupled to structured baths have gained more and more attention in recent years, as they constitute a versatile platform where one can test and explore unconventional quantum optics, or even use them for some quantum information processing or quantum simulation. From a broader point of view, quantum impurity…

Pablo Martínez-Azcona (University of Luxemburg) The study of chaotic behavior in the quantum realm is now at an exciting crossroads, connecting in a unique way quantum information, high energy physics, statistical mechanics and even pure math. We will begin this seminar with a broad introduction to the field of Quantum Chaos, giving particular weight to…

Pablo Bermejo (DIPC-Multiverse Computing) We are currently experiencing the era of NISQ (Noise Intermediate Scale Quantum) devices. This means that there is still an uncertain near-term future for fields such as quantum computing, which completely relies on quantum hardware that is not yet capable of delivering the required performance to achieve game-changer applications. In spite…

Cristián Tabares (CSIC-IFF) Quantum computers and simulators are expected to provide new ways to study the properties ofcomplex quantum circuits. Since they are still prone to errors in the calculations, Variational Quantum Algorithms (VQAs) have emerged as a possible practical way to exploit current state-of-the-art quantum devices. These algorithms propose using a classical optimizer to…

Virginia N. Ciriano Tejel (Quantum motion) Silicon has become one of the leading platforms for quantum computation, having demonstrated qubits with long coherence times and high fidelity operations. Moreover, the similarities between silicon quantum dots and transistors give hope for mass production of qubits easily integrable with control electronics.  This seminar will go over the…

Guillem Llodrà (IFISC UIB-CSIC) Quantum reservoir computing is a neuro-inspired machine learning approach harnessingthe rich dynamics of quantum systems to solve temporal tasks. It has gathered attentionfor its suitability for NISQ devices, for easy and fast trainability, and for potentialquantum advantage. Although several types of systems have been proposed as quantumreservoirs, differences arising from particle…

Nadir Samos Sáenz de Buruaga (INMA) I will review the barren plateaus (BPs) issue in the field of variational quantum algorithms(VQA) with a particular focus on those generated by an excess of randomness, providingan accessible introduction to the topic. I will also show that restricting the entanglementof the states seems not to be a good…

Carlos González-Ballestero (Institute of theoretical physics – U Insbruck) Despite its tremendous success, microwave-based quantum technology has limitations that couldbe solved by a hybrid approach, i. e. by interfacing microwaves with another degree of freedomwith complementary properties. Spin waves in ferromagnets, and their quanta magnons, are idealcandidates as they show tuneable spectrum and nonlinearity, have…

Alejandro Pozas-Kerstjens (ICMAT) Vast amounts of data are routinely processed in machine learning pipelines, every time coveringmore aspects of our interactions with the world. However, the quest for performance is leavingother important aspects, such as privacy, on the side. For example, when the models processingthe data are made public, is the safety of the data…

Daniel Gonçalves (ICFO) We explore the combination of sub-wavelength, two-dimensional atomic arrays andRydberg interactions as a powerful platform to realize strong, coherent interactionsbetween individual photons with high fidelity. In particular, the spatial ordering of theatoms guarantees efficient atom-light interactions without the possibility of scatteringlight into unwanted directions, for example, allowing the array to act as…