5 papers
Storage capacity and learning capability of quantum neural networks
Maciej Lewenstein, Aikaterini Gratsea, Andreu Riera-Campeny +3
We study the storage capacity of quantum neural networks (QNNs) described as completely positive trace preserving (CPTP) maps, which act on an -dimensional Hilbert space. We dem…
Universal and optimal coin sequences for high entanglement generation in 1D discrete time quantum walks
Aikaterini Gratsea, Friederike Metz, Thomas Busch
Entanglement is a key resource in many quantum information applications and achieving high values independently of the initial conditions is an important task. Here we address the…
Spatially-selective and quantum-statistics-limited light stimulus for retina biometrics and pupillometry
A. Margaritakis, G. Anyfantaki, K. Mouloudakis +2
Quantum vision is currently emerging as an interdisciplinary field synthesizing the physiology of human vision with modern quantum optics. We recently proposed a biometric scheme b…
Generation of hybrid maximally entangled states in a one-dimensional quantum walk
Aikaterini Gratsea, Maciej Lewenstein, Alexandre Dauphin
We study the generation of hybrid entanglement in a one-dimensional quantum walk. In particular, we explore the preparation of maximally entangled states between position and spin…
Photon-assisted quantum state transfer and entanglement generation in spin chains
A. Gratsea, G. M. Nikolopoulos, P. Lambropoulos
We propose a protocol for state transfer and entanglement generation between two distant spin qubits (sender and receiver) that have different energies. The two qubits are permanen…