QuICS - Quantum: Information, Complexity, Simulation

Session

Junior Speakers

30 Sept 2025, 17:00

Conference Room (Bari (Italy) - Palazzo dell'Acqua)

10. Environment-induced quantum phase transitions and quantum Fisher information in two-level systems

Grazia Di Bello

30/09/2025, 17:00

We investigate the dynamical and thermodynamic properties of the open Rabi model, a two-level system coupled to an oscillator beyond the rotating-wave approximation, and its two-qubit extension, focusing on equilibrium quantum phase transitions (QPTs) and dynamical quantum phase transitions (DQPTs) induced by environmental interactions. To address these problems, we employ the Density-Matrix...

19. Observational entropy of quantum correlations and entanglement

Leonardo Rossetti

01/10/2025, 17:00

The use of coarse graining to connect physical and information theoretic entropies has recently been given a precise formulation in terms of “observational entropy”, a measure of the uncertainty about a system’s state that incorporates the specific operation an observer performs to acquire information about that state. Observers with access to limited sets of measurements observe an entropy...

27. Tensor network simulation of a waveguide QED architecture with multiple emitters

Rosa Lucia Capurso

02/10/2025, 16:10

Waveguide Quantum Electrodynamics (Waveguide QED) is a promising and versatile platform for studying fundamental light-matter interactions and quantum technology implementations. Notably, interesting effects emerge when two or more quantum emitters are coupled to the waveguide, including collective phenomena, e.g., superradiance and formation of bound states in the continuum (BICs). An...

28. Reliable quantum advantage in quantum battery charging

Davide Rinaldi

02/10/2025, 17:00

Quantum technologies must be both miniaturized and effectively scaled in order to achieve a high level of competitiveness and efficiency. However, devices operating at the nanoscale necessitate the management of extremely small quantities of energy. But how can fluctuations be properly accounted for? Indeed, the smaller the amount of energy involved, the more significant the relative impact of...

33. Thermodynamic analysis of uniform real-phased qubits states

Paolo Scarafile

03/10/2025, 12:00

We investigate the thermodynamic properties of the uniform real-phased submanifold in $n$-qubit systems ($(\pm)$-state), represented as a classical ensemble of $2^n$ spins subject to a potential encoding multipartite entanglement. For small system sizes ($n \leq 6$), we perform exact enumeration, enabling a complete statistical characterization of the energy landscape and associated...

34. Optimal and robust error filtration for quantum information processing

Aaqib Ali

03/10/2025, 12:30

Error filtration is a hardware scheme that mitigates noise by exploiting auxiliary qubits and entangling gates. Although both signal and ancillas are subject to local noise, constructive interference and post-selection allow us to reduce the noise level in the signal qubit. Here we highlight the relation between error filtration and error detection codes, and determine the optimal codes that...