QUANTUM COMPUTER: HOW FEASIBLE IS THE IDEA?

COSMOS ◽  
2006 ◽  
Vol 02 (01) ◽  
pp. 101-110
Author(s):  
L. C. KWEK ◽  
ARTUR EKERT
Keyword(s):  
Feasibility Study ◽  
Quantum Computer ◽  
Experimental Realization ◽  
Memory Space ◽  
Atoms And Molecules ◽  
Computer Chips ◽  
Made In

The need for increased memory space and higher speed in computers has fueled the demand for smaller and faster computers. However, as the computer chips miniaturize, it becomes inevitable that we need to look at the possibility of manipulating and addressing atoms and molecules individually. One such possibility is a feasibility study of a quantum computer. In this report, we summarize some of the progress made in experimental realization of quantum computer in the last few years.

ontrolled implementation of two-photon controlled phase gate within a network

2010 ◽  
Vol 10 (9&10) ◽  
pp. 821-828
Author(s):  
Yan Xia ◽  
Jie Song ◽  
Zhen-Biao Yang ◽  
Shi-Biao Zheng
Keyword(s):  
Quantum Computer ◽  
Photon Detectors ◽  
Optical Elements ◽  
Experimental Realization ◽  
Two Photon ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Linear Optical ◽  
Polarized Photons ◽  
Linear Optical Elements

We propose a protocol to controlled implement the two-photon controlled phase gate within a network by using interference of polarized photons. The realization of this protocol is appealing due to the fact that the quantum state of light is robust against the decoherence, and photons are ideal carriers for transmitting quantum information over long distances. The proposed setup involves simple linear optical elements and the conventional photon detectors that only distinguish the vacuum and nonvacuum Fock number states. This can greatly simplify the experimental realization of a linear optical quantum computer.

scholarly journals Experimental Realization of a One-Way Quantum Computer Algorithm Solving Simon’s Problem

2014 ◽  
Vol 113 (20) ◽  
Author(s):  
M. S. Tame ◽  
B. A. Bell ◽  
C. Di Franco ◽  
W. J. Wadsworth ◽  
J. G. Rarity
Keyword(s):  
Quantum Computer ◽  
Computer Algorithm ◽  
Experimental Realization

Design for Desired Mode Shapes: Preliminary Results

1998 ◽  
Author(s):  
Elizabeth K. Lai ◽  
G. K. Ananthasuresh
Keyword(s):  
Finite Element ◽  
Feasibility Study ◽  
Mode Shape ◽  
Longitudinal Axis ◽  
Mode Shapes ◽  
Future Research ◽  
Structural Members ◽  
Element Analysis ◽  
Cross Sectional ◽  
Made In

Abstract This paper is concerned with the shape optimization of structures to attain prescribed normal mode shapes. Optimizing structural members in order to have desired mode shapes, besides the desired natural frequencies, is of interest in some applications at both macro and micro scales. After reviewing the relevant past work on the “inverse mode shape” problem, a feasibility study using the lumped spring-mass models and finite element models of an axially vibrating bar is presented. Based on the observations made in the feasibility study with bars, a meaningful optimization problem is formulated and solved. Using finite element analysis and numerical optimization, a method for designing beam-like structures for prescribed mode shapes is developed. The method is demonstrated with an example of designing the cross-sectional area profile of a beam along its longitudinal axis to get a desired fundamental mode shape. The nonuniqueness of the solution is noted and avenues for future research are identified.

Comparison of Different Grid Structures for the Hydrocyclone Flow Field Simulation

2013 ◽  
Vol 353-356 ◽  
pp. 3399-3402
Author(s):  
Guang Dong Guo ◽  
Song Sheng Deng ◽  
Wei Xing Hua
Keyword(s):  
Flow Field ◽  
Single Phase ◽  
Unstructured Grid ◽  
Water Separation ◽  
Memory Space ◽  
Structured Grid ◽  
Oil Water Separation ◽  
Oil Water ◽  
Hybrid Grid ◽  
Made In

In the CFD(computational fluid dynamics) study of hydrocyclones, the grid is a important factor to predicting the flow field. An attempt has been made in this study, in the same turbulence model and boundary conditions, three different structures of grid, the structured grid, the unstructured grid and the hybrid grid, are compared for the predictions of the axial, radial and tangential velocities. It has been observed that the memory space structured grid is large, and there are much number grid of the unstructured grid. The structured grid led to an improved turbulence field prediction and thereby to predict the velocity fields of single phase flow field more accurately. The unstructured grids is used to simulate the process of oil-water separation.

scholarly journals Feasibility Study on Intra-Grid Location Estimation Using Power ENF Signals

2021 ◽  
Author(s):  
Ravi Garg ◽  
Adi Hajj-Ahmad ◽  
Min Wu
Keyword(s):  
Feasibility Study ◽  
Power Distribution ◽  
Power Grid ◽  
Distribution Networks ◽  
Location Estimation ◽  
Power Distribution Networks ◽  
Video Recordings ◽  
The Media ◽  
Audio Video ◽  
Made In

<div>The Electric Network Frequency (ENF) is a signature of power distribution networks that can be captured by multimedia recordings made in areas where there is electrical activity. This has led to an emergence of several forensic applications based on the use of the ENF signature. Examples of such applications include estimating or verifying the time-of-recording of a media signal and inferring the power grid associated with the location in which the media signal was recorded. In this paper, we carry out a feasibility study to examine the possibility of using embedded ENF traces to pinpoint the location-of-recording of a signal within a power grid. In this study, we demonstrate that it is possible to pinpoint the location-of-recording to a certain geographical resolution using power signal recordings containing strong ENF traces. To this purpose, a high-passed version of an ENF signal is extracted and it is demonstrated that the correlation between two such signals, extracted from recordings made in different geographical locations within the same grid, decreases as the distance between the recording locations increases. We harness this property of correlation in the ENF signals to propose trilateration based localization methods, which pinpoint the unknown location of a recording while using some known recording locations as anchor locations. We also discuss the challenges that need to be overcome in order to extend this work to using ENF traces in noisier audio/video recordings for such fine localization purposes.</div>

scholarly journals Using quantum communications for maritime signal flags

2019 ◽  
Vol XXII (1) ◽  
pp. 151-157
Author(s):  
Plesa M. C.
Keyword(s):  
Quantum Communication ◽  
Quantum Computer ◽  
Quantum Communications ◽  
Maritime Communication ◽  
Quantum Internet ◽  
Made In

Quantum communications are becoming very quickly a reality. There are huge advancement made in the field of quantum internet. Recently, IBM has announced the first commercial quantum computer with 20 qubits. Given all the advancements in the field, in this paper we investigate how quantum technologies can be applied in maritime communications. In this paper we address the problem of international maritime flag signals. More exactly, we proposed some quantum communication schemes for international maritime signal flags. We are also study the efficiency and security boost that quantum communications give in this type of maritime communication.

scholarly journals El Paso Uprates Two Gas Turbines

1962 ◽  
Author(s):  
J. I. Uhr ◽  
B. J. Matthews
Keyword(s):  
Feasibility Study ◽  
Gas Turbines ◽  
El Paso ◽  
Operating Experience ◽  
General Electric ◽  
Continuous Progress ◽  
Turbine Design ◽  
Made In

El Paso discusses the philosophy of uprating older gas turbines by taking advantage of the continuous progress being made in turbine design. This paper describes El Paso’s uprating of two General Electric gas turbines and includes the feasibility study, modificaton required and operating experience.

scholarly journals Emergence: Distracting Notions and How to Get It Right

2019 ◽  
Author(s):  
Vincent Vesterby
Keyword(s):  
Intrinsic Nature ◽  
Solar Systems ◽  
Atoms And Molecules ◽  
The Third ◽  
The Creation ◽  
The Universe ◽  
Material Organization ◽  
Made In

Ever since George Henry Lewes coined the term emergence, various notions have been associated with emergence that have little or nothing to do with emergence itself. These notions distract from the understanding of emergence to such a degree that very little progress was made in over a century of discussion. Emergence is the coming into existence of patterns-of-material-organization as a consequence of motion. The process of emergence plays major roles in the universe, such as the creation of the hierarchic organization of the material universe from quarks, atoms, and molecules to planets, solar systems, and galaxies. Typical discussions about emergence in the literature are about the distracting notions and not actually about emergence itself. This essay has three primary parts. First is discussion of the intrinsic nature of emergence. The second part explains why the distracting notions are not really about emergence. The third part gives an introduction to methods that can provide understanding of the process of emergence.

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