Abstract
In the last few years, there is a huge upsurge in the number of closed deals regarding quantum technologies for materials, computing, communication and instrumentation. Such a trend has inevitably affected the research funding market; thus, large state initiatives are taken that are directly expected to drive the formulation of novel research concepts and the development of quantum device prototypes from sensors and circuitry to quantum memory and repeaters. A fundamental operation behind all these applications is the effective steering of electrons, constituting matter waves, along specific directions and with certain magnitudes, due to development of various reflective and refractive orders. The objective of this study is to optimize the simplest structure that supports such anomalous diffraction, namely a quantum metasurface comprising cylindrical rods embedded in suitable crystalline matter. Several highly-performing designs from these minimal setups are proven to work exceptionally as multiport components, employable to a variety of quantum engineering implementations.
Highlights
1 Introduction Quantum technologies are today developing at a rapid pace and providing novel concepts that address in a revolutionary manner multiple core scientific problems. Quite high on this list one may find quantum sensing that boosts dramatically the optical resolution of extremely close point-like sources [1] and sets new limits in spectroscopy and metrology via quantum interpolation [2]. Such evolutions have led to demonstration of quantum memory that enhances the interval over which phases are accumulated, beyond the coherence lifetime [3]
Even quantum network architectures have become feasible via interconnections that convert quantum states from one physical system to those of another in a reversible way [7]
The presented results are useful to the interested experimentalist that aims at fabricating steering modules for quantum circuits and signal processors, where the spatial channeling of matter waves is required
Summary
Quantum technologies are today developing at a rapid pace and providing novel concepts that address in a revolutionary manner multiple core scientific problems Quite high on this list one may find quantum sensing that boosts dramatically the optical resolution of extremely close point-like sources [1] and sets new limits in spectroscopy and metrology via quantum interpolation [2]. Quantum communication technologies based on solid-state devices enabling stogage of quantum entanglement have been proposed, paving the way for building multiplexed repeaters for long-distance quantum networks [4]. Even quantum network architectures have become feasible via interconnections that convert quantum states from one physical system to those of another in a reversible way [7]
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