A key question for the development of quantum thermos-machines and more generally of quantum technologies is what are the ultimate bounds to the performance of heat engines. We have shown [1] that in the antiadiabatic limit a periodically driven isothermal heat engine can approach the ideal (unit) energy conversion efficiency with finite output power and vanishingly small relative power...
We study the possibility of conveying useful energy (work) along a transmission line that allows for a partial preservation of quantum coherence. As a figure of merit we adopt the maximum values that ergotropy, total ergotropy, and non-equilibrium free-energy attain at the output of the line for an assigned input energy threshold. When the system can be modelled in terms of Phase-Invariant...
A classical-quantum hybrid approach to computation is presented, allogwing for a (quadratic) performance improvement in the learning stage of a neural network. In particular, a quantum computing routine is described, which helps to prepare/update the probability distributions that drive the agent operations. This algorithm can be used not only in a reinforcement learning scenario, but also in...
Quantum Cascade Laser (QCL) frequency combs could emit nonclassical light and multimode entanglement thanks to a third order nonlinearity that allows for Four Wave Mixing in the device (Faist 2016), which makes them ideal candidates for free-space communication applications.
However, in the mid-infrared, the lack of efficient and low-noise detectors compromises enormously the ability to...
We present quantum reading [3] realisation, describing theoretically and experimentally, as that quantum advantage is obtained by practical photon-counting measurements combined with a simple maximum-likelihood decision [4], demonstrating that quantum entanglement and simple optics are able to enhance the readout of digital data.
Then we consider [5] a protocol on conformance test. We...
