Perfect coherent transfer in an on-chip reconfigurable nanoelectromechanical network

Abstract

Realizing a controllable network with multiple degrees of interaction is a challenge to physics and engineering. Here, we experimentally report an on-chip reconfigurable network based on nanoelectromechanical resonators with nearest-neighbor (NN) and next-nearest-neighbor (NNN) strong couplings. By applying different parametric voltages on the same on-chip device, we carry out perfect coherent transfer in NN and NNN coupled array networks. Moreover, the low-loss resonators ensure the desired evolution to achieve perfect transfer and the demonstration of the parity-dependent phase relation at transmission cycles. The realization of NNN couplings demonstrates the capability of engineering coherent coupling beyond a simple model of a NN coupled array of doubly clamped resonators. Our reconfigurable nanoelectromechanical network provides a highly tunable physical platform and offers the possibilities of investigating various interesting phenomena, such as topological transport, synchronization of networks, as well as metamaterials.

Collective transient ratchet transport induced by many elastically interacting particles

“…We mention classical and quantum possibilities for which the collective transport could be of major relevance, like organic electronic ratchets 48 , separating leukocytes from whole blood using the microfluidic ratchet mechanism 49 , tunneling in two-dimensional semiconductors 50 , mesoscopic electronic transport 51 and polystyrene microspheres immersed in water 52 , to mention a few. Furthermore, the diffusive-like coupling considered here is widespread and can be implemented in some realistic applications, for example, in the coherent transfer in nanoelectromechanical networks 53 , in experiments with coupled electrochemical reactions 54 , in biomolecular motors as in muscles composed of linear structures, which consist of many parts 55 and in proteins of the kinesin superfamily, where the kinesin direction of motion of the two-headed molecules along microtubules could be reversed by adjusting the architecture of a small domain of the protein named the neck region 56 , 57 .…”

Dynamical Topological Quantum Phase Transitions at Criticality

“…However, dynamical topolocical order parameter can truly capture the TQPT on the zero Berry curvature line, where the Chern number is zero. We would like to suggest that our findings can be explored experimentally using a two dimensional lattice of nanoelectromechanical resonators 65,66 (see Appendix E). Moreover, these results can be examined using the multibands models, especifically the multibands metalic systems.…”

Fast and robust quantum state transfer via a topological chain

“…The most common model describing a quantum chain is the one-dimensional spin-1/2 chain. The Hamiltonian used is quite generic and the results can be applied to a variety of physical systems such as evanescently coupled waveguides [2][3][4], acoustic cavities [5], diamond vacancies [6], superconducting circuits [7,8], arrays of quantum dots [9], driven optical lattices [10], NMR [11], and nanoelectromechanical networks [12].…”