Articles in 2020

Limits on the functionality and miniaturization of Si-based devices present barriers towards integration into quantum electronics. The authors present an alternative, resonant tunnelling transistor based on a two-dimensional layered heterostructure, exhibiting multiple regions of negative differential conductance.

Generating and manipulating solitons in more than one dimension is a major challenge in nonlinear matter physics. This paper reports an experimental investigation of the structure, generation, dynamic behaviour, and manipulation of multidimensional solitons in cholesteric liquid crystals

Semiconductor nanostructures are fabricated via deposition and lithographic techniques and provide suitable means to tailor spin dynamics. The authors demonstrate that even light can induce a non-destructive and reconfigurable confinement potential, eventually offering an unmatched flexibility for controlling electron spin coherence.

Quantum simulators give access to quantum dynamics but for large systems it is difficult to read-out informative observables. By using precise modelling the authors demonstrate how to read-out expectation values of non-commuting sets of observables of phonons in cold atomic gases which gives information about their dynamics and thermodynamics.

An open question in understanding brain functionality is the emergence of different critical regimes in neural avalanches. By using micro-electrode array recordings and a dynamical neural network model based on realistic biological principles, the authors show that transitions between different critical regimes with different computational capabilities can occur in the early developmental stages of in vitro neural cultures.

Alloyed transition metal dichalcogenides provide a route toward atomically-thin phase change memories that host valleytronic behaviours. Here, Raman and photoluminescence spectroscopies are employed to demonstrate the robustness of valley polarisation to chemical substitution in monolayer alloys.

Quantum information processing holds promise to achieve more secure data transfer in the current network of telecommunication fibres. Here, the authors review recent works implementing spatial division multiplexing in optical fibres and discuss their potential for quantum communication in classical networks.

The electronic structure of copper-based metalloproteins is important for their function in biological processes, but studying this from a computational standpoint can be challenging. Here, the authors report a dynamical mean field theory approach which reveals the role of strong electronic correlation effects in oxygen binding in the hemocyanin protein.

The quest for quantum machine superiority over their classical counterpart is of particular interest while looking at the thermodynamics of a heat machine. The authors analyse a quantum heat machine driven sufficiently fast so as to entail non-Markovian dynamics, showing that quantum-enhanced power output and refrigeration can be achieved through anti-Zeno dynamics, which was first predicted by Kofman and Kurizki in 2000.

Describing the interaction of a hydrogen atom with a strong laser field requires solving computationally expensive ab initio calculations. Here, the authors solve the Heisenberg equations analytically by introducing a quantum version of the Simple Man Model, which allows straightforward computation of the autocorrelation functions.

Graphene-based Josephson junctions can make highly sensitive quantum probes and are dependent on properties related to the current phase relationship. Here, the authors theoretically investigate the power spectrum of the critical current fluctuations in graphene Josephson junctions and demonstrate that they have a 1/f dependence on frequency.

Coupling in many-body systems leads to complex nonlinear effects, but the transition between instantaneous and time-delayed regimes is not well understood. This work shows that spatially-separated exciton-polariton condensates can be controlled to exhibit complex spectral patterns through time-delayed coupling.

The origin of Dark Matter (DM) in the Universe remains one of the main unresolved questions in Cosmology. The authors propose to probe a scenario where DM forms a compact object known as boson star, or a small DM halo bound to the Earth or sun, with a density higher than the local DM density making them detectable via atomic physics table top experiments.

Acousto-optical imaging (AOI) is a technique used for deep tissue microscopy in biomedical applications. The authors use statistical approaches of super-resolution optical fluorescent imaging allowing them to realise high resolution AOI with speckle decorrelation in a much shorter time.

By connecting light and magnetism, the cavity magnon-polariton offers a link between quantum computing and spintronics. Here, an important step towards this goal is achieved by demonstrating a dynamic control over both subsystems with coherent microwave pulses on nanosecond timescales.