scholarly journals Visualizing designer quantum states in stable macrocycle quantum corrals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xinnan Peng ◽  
Harshitra Mahalingam ◽  
Shaoqiang Dong ◽  
Pingo Mutombo ◽  
Jie Su ◽  
...  
Keyword(s):  
Atomic Orbital ◽  
Molecular Assembly ◽  
Quantum States ◽  
Scattered Electron ◽  
Resonance States ◽  
Practical Applications ◽  
Atomic Precision ◽  
Covalently Linked ◽  
On Chip ◽  
Quantum Technology

AbstractCreating atomically precise quantum architectures with high digital fidelity and desired quantum states is an important goal in a new era of quantum technology. The strategy of creating these quantum nanostructures mainly relies on atom-by-atom, molecule-by-molecule manipulation or molecular assembly through non-covalent interactions, which thus lack sufficient chemical robustness required for on-chip quantum device operation at elevated temperature. Here, we report a bottom-up synthesis of covalently linked organic quantum corrals (OQCs) with atomic precision to induce the formation of topology-controlled quantum resonance states, arising from a collective interference of scattered electron waves inside the quantum nanocavities. Individual OQCs host a series of atomic orbital-like resonance states whose orbital hybridization into artificial homo-diatomic and hetero-diatomic molecular-like resonance states can be constructed in Cassini oval-shaped OQCs with desired topologies corroborated by joint ab initio and analytic calculations. Our studies open up a new avenue to fabricate covalently linked large-sized OQCs with atomic precision to engineer desired quantum states with high chemical robustness and digital fidelity for future practical applications.

scholarly journals Visualizing designer quantum states in stable macrocycle quantum corrals

2021 ◽  
Author(s):  
Jiong Lu ◽  
Xinnan Peng ◽  
Harshitra Mahalingam ◽  
Shaoqiang Dong ◽  
Pingo Mutombo ◽  
...  
Keyword(s):  
Atomic Orbital ◽  
Molecular Assembly ◽  
Quantum States ◽  
Scattered Electron ◽  
Resonance States ◽  
New Era ◽  
Atomic Precision ◽  
Covalently Linked ◽  
On Chip ◽  
Quantum Technology

Abstract Creating atomically-precise quantum architectures with high digital fidelity and desired quantum states is an important goal in a new era of quantum technology. The strategy of creating these quantum nanostructures mainly relies on atom-by-atom, molecule-by-molecule manipulation or molecular assembly through non-covalent interactions, which thus lack sufficient chemical robustness required for on-chip quantum device operation at elevated temperature. Here, we report a bottom-up synthesis of covalently linked organic quantum corrals (OQCs) with atomic precision to induce the formation of topology-controlled quantum resonance states, arising from a collective interference of scattered electron waves inside the quantum nanocavities. Individual OQCs host a series of atomic orbital-like resonance states whose orbital hybridization into artificial homo-diatomic and hetero-diatomic molecular-like resonance states can be constructed in Cassini oval-shaped OQCs with desired topologies corroborated by joint and analytic calculations. Our studies open up a new avenue to fabricate covalently linked large-sized OQCs with atomic precision to engineer desired quantum states with high chemical robustness and digital fidelity for new-generation quantum technology.

scholarly journals Zero uncertainty states in the presence of quantum memory

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Huangjun Zhu
Keyword(s):  
Uncertainty Principle ◽  
Quantum States ◽  
Quantum Memory ◽  
System State ◽  
Von Neumann ◽  
Practical Applications ◽  
Classical Information ◽  
Fundamental Limit ◽  
Minimum Uncertainty ◽  
Incompatible Observables

AbstractThe uncertainty principle imposes a fundamental limit on predicting the measurement outcomes of incompatible observables even if complete classical information of the system state is known. The situation is different if one can build a quantum memory entangled with the system. Zero uncertainty states (in contrast with minimum uncertainty states) are peculiar quantum states that can eliminate uncertainties of incompatible von Neumann observables once assisted by suitable measurements on the memory. Here we determine all zero uncertainty states of any given set of nondegenerate observables and determine the minimum entanglement required. It turns out all zero uncertainty states are maximally entangled in a generic case, and vice versa, even if these observables are only weakly incompatible. Our work establishes a simple and precise connection between zero uncertainty and maximum entanglement, which is of interest to foundational studies and practical applications, including quantum certification and verification.

Fifty years of Electronic Hardware Implementations of First and Higher Order Neural Networks

2010 ◽  
pp. 269-285 ◽  
Author(s):  
David R. Selviah ◽  
Janti Shawash
Keyword(s):  
Neural Networks ◽  
Real Time ◽  
High Speed ◽  
Higher Order ◽  
Low Latency ◽  
Real Time Control ◽  
Practical Applications ◽  
Field Programmable ◽  
On Chip ◽  
Electronic Hardware

This chapter celebrates 50 years of first and higher order neural network (HONN) implementations in terms of the physical layout and structure of electronic hardware, which offers high speed, low latency, compact, low cost, low power, mass produced systems. Low latency is essential for practical applications in real time control for which software implementations running on CPUs are too slow. The literature review chapter traces the chronological development of electronic neural networks (ENN) discussing selected papers in detail from analog electronic hardware, through probabilistic RAM, generalizing RAM, custom silicon Very Large Scale Integrated (VLSI) circuit, Neuromorphic chips, pulse stream interconnected neurons to Application Specific Integrated circuits (ASICs) and Zero Instruction Set Chips (ZISCs). Reconfigurable Field Programmable Gate Arrays (FPGAs) are given particular attention as the most recent generation incorporate Digital Signal Processing (DSP) units to provide full System on Chip (SoC) capability offering the possibility of real-time, on-line and on-chip learning.

An On-Chip Homodyne Detector for Measuring Quantum States

2018 ◽  
Author(s):  
Giacomo Ferranti ◽  
Francesco Raffaelli ◽  
Dylan H. Mahler ◽  
Philip Sibson ◽  
Jake E. Kennard ◽  
...  
Keyword(s):  
Quantum States ◽  
Homodyne Detector ◽  
On Chip

Scalable on-chip generation and coherent control of complex optical quantum states

2018 ◽  
Author(s):  
Piotr Roztocki ◽  
Michael Kues ◽  
Christian Reimer ◽  
Luis Romero Cortés ◽  
Stefania Sciara ◽  
...  
Keyword(s):  
Coherent Control ◽  
Quantum States ◽  
On Chip

Toward all-optical control of rare-earth ions for on-chip quantum technology

2017 ◽  
Author(s):  
John G. Bartholomew ◽  
Raymond Lopez-Rios ◽  
Jonathan M. Kindem ◽  
Jake Rochman ◽  
Tian Zhong ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Optical Control ◽  
All Optical ◽  
On Chip ◽  
Quantum Technology

The Chemistry of Single-Walled Nanotubes

MRS Bulletin ◽  
2009 ◽  
Vol 34 (12) ◽  
pp. 950-961 ◽  
Author(s):  
Michael S. Strano ◽  
Ardemis A. Boghossian ◽  
Woo-Jae Kim ◽  
Paul W. Barone ◽  
Esther S. Jeng ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Electrical Transport ◽  
Near Infrared ◽  
Scientific Discovery ◽  
Electronic Devices ◽  
Fluorescent Sensors ◽  
Infrared Light ◽  
Practical Applications ◽  
On Chip ◽  
Walled Carbon Nanotubes

AbstractThe unique structural, electronic, and mechanical properties of single-walled carbon nanotubes (SWNTs) have opened the doors to developments that push the limits of science. These advancements not only further scientific discovery, but also result in the development of everyday practical applications. These applications vary from singlemolecule sensors to nano-scaled transistors to multi-modal biosensors. This article focuses on three distinct developments made as a result of recent advances in spectroscopy of SWNTs. The first system examines the use of SWNTs for molecular detection using near-infrared light to produce tunable fluorescent sensors that are highly photostable. The second system examines the use of a 4-hydroxybenzene diazonium reagent to sort SWNTs based on electronic structure to create on-chip modifications of nano-electronic devices. The third system characterizes nanotube networks for such applications as flexible electronics, exploring the irreversible binding of adsorbates onto nanotube networks using electrical transport and Raman spectroscopy.

scholarly journals Computing Sorted Subsets for Data Processing in Communicating Software/Hardware Control Systems

2015 ◽  
Vol 11 (1) ◽  
pp. 126 ◽  
Author(s):  
Valery Sklyarov ◽  
Iouliia Skliarova ◽  
Artjom Rjabov ◽  
Alexander Sudnitson
Keyword(s):  
High Performance ◽  
Large Data ◽  
Computation Method ◽  
Data Sets ◽  
Processing Unit ◽  
Programmable Logic ◽  
Practical Applications ◽  
Sorting Networks ◽  
Hardware System ◽  
On Chip

Computing and filtering sorted subsets are frequently required in statistical data manipulation and control applications. The main objective is to extract subsets from large data sets in accordance with some criteria, for example, with the maximum and/or the minimum values in the entire set or within the predefined constraints. The paper suggests a new computation method enabling the indicated above problem to be solved in all programmable systems-on-chip from the Xilinx Zynq family that combine a dual-core Cortex-A9 processing unit and programmable logic linked by high-performance interfaces. The method involves highly parallel sorting networks and run-time filtering. The computations are done in communicating software, running in the processing unit, and hardware, implemented in the programmable logic. Practical applications of the proposed technique are also shown. The results of implementation and experiments clearly demonstrate significant speed-up of the developed software/hardware system comparing to alternative software implementations.

scholarly journals Bibliometric Analysis in the Field of Quantum Technology

2021 ◽  
Vol 3 (3) ◽  
pp. 549-575
Author(s):  
Thomas Scheidsteger ◽  
Robin Haunschild ◽  
Lutz Bornmann ◽  
Christoph Ettl
Keyword(s):  
Web Of Science ◽  
Publication Output ◽  
Single Quantum ◽  
Practical Applications ◽  
Quantum Particles ◽  
Computer Scientists ◽  
The Usa ◽  
Quantum Technology ◽  
Doubling Times ◽  
Highly Cited

The second quantum technological revolution started around 1980 with the control of single quantum particles and their interaction on an individual basis. These experimental achievements enabled physicists, engineers, and computer scientists to utilize long-known quantum features—especially superposition and entanglement of single quantum states—for a whole range of practical applications. We use a publication set of 54,598 papers from Web of Science, published between 1980 and 2018, to investigate the time development of four main subfields of quantum technology in terms of numbers and shares of publications, as well as the occurrence of topics and their relation to the 25 top contributing countries. Three successive time periods are distinguished in the analyses by their short doubling times in relation to the whole Web of Science. The periods can be characterized by the publication of pioneering works, the exploration of research topics, and the maturing of quantum technology, respectively. Compared to the USA, China’s contribution to the worldwide publication output is overproportionate, but not in the segment of highly cited papers.

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