Computing Definition and 683 Threads

Hi all, I am soon starting a research project into Earths core dynamics, and will be using a pre existing code. I understand the principle of DNS and resolving for all different resolutions. But I do not really understand how to implement that efficiently. Does anyone have any good resources...

Until now, I have always think of Matlab as CAS but now I know that it is not. So how do you understand this? Thank you.

Hi everybody, My post today is about Molecular Symmetry group (MS) for non-rigid molecules. I read from this excellent work (Longuet-Higgins), that MS is obtained by selecting only feasible operation from Complete Nuclear Permutation Inversion Group (CNPI). My question is, As I have a quite...

Hi all, I'm trying to compute the solutions to a general case for a Schroedinger equation with a radial potential but I'm stuck on a rather small detail that I'm not sure about. It's well known that I can perform the change of variables to spherical coordinates and express the radial part of the...

Hello, I’m currently an Undergraduate Computer Engineer at UIC and minoring in physics. I have become more and more interested in Quantum Computing and its related fields. I plan on continuing my masters in Electrical engineering and taking graduate level physics classes at the same time. I...

Hello I am studying Software Engineer but I am interested in Quantum Computing, I never had any serious relationships with physics so i need to start from somewhere, Can you help me?

I am planning to take go into quantum computing. I am a Computer Engineer with a minor in physics with a focus on modern quantum theory. I was wondering if I take undergraduate and graduate level quantum physics classes would be enough for me to have a solid background on the subject before I do...

Using Optical Computing, what is the max amount of state changes that 1 transistor could theoretically have within 1 second? I once read that an electrical transistor could achieve 100 billion state changes per second, but I'm wondering what the number is for light, *and what it could...

Homework Statement ## r_{A} (n) = ## number of solutions of ## { \vec{x} \in Z^{m} ; A[\vec{x}] =n} ## where ##A[x]= x^t A x ##, is the associated quadratic from to the matrix ##A##, where here ##A## is positive definite, of rank ##m## and even. (and I think symmetric?) I am solving for the...

With the development of quantum computing, just how much could it improve our lives. Obviously faster computing, but could we begin to do things than conventional computer can't?

I just read about HP's new computing technology, memory-driven computing. But I can't figure out the idea behind it. Can anyone explain about it? Thanks...

Homework Statement I'm running a simulation and was given 2 mass flow rates (let's say m1_dot and m2_dot) for 2 chemical species at the inlet. Homework Equations mass flow rate = density*velocity * area The Attempt at a Solution I need to compute the bulk velocity for the fluid (consisting...

I am working on astrophysical data and I have a large number of redshift values of quasars. Now, each redshift estimate comes with its estimated standard error naturally. If I plot a histogram of these redshifts, I would expect the bins counts to also have some sort of uncertainty. I am unable...

I have been reading lately about the University of Sussex work on large scale quantum computing that doesn't require the Laser beam approach to controlling the atom. This seems like a huge breakthrough in the development of quantum computers however a forum search doesn't have any mention of it...

Hey all! I'm a junior undergrad and am beginning to think about what graduate programs I would like to apply to next fall. Recently I've been doing theoretical research in quantum computing which I'm really enjoying. I'm pretty sure that this is the sort of research I would like to pursue in...

(tl;dr: Interested in the hardware side of quantum computing, but don't want to commit to staying in academia. Is getting an industry job in quantum computing going to be realistic in 6-8 years? Are there other viable engineering-type jobs available if I end up getting a PhD in this field?) Hi...

Hello, I have to prove that the Weingarten Map L for the unit sphere is + or - the identity "by computing the Lik in a coordinate patch and raising an index". S^2 : x(Φ,θ)=(sinΦcosθ, sinΦsinθ, cosΦ) I have computed the first (g) and the second (Λ) fundamental forms and I have found : L=g-1Λ=...

Hi. I was wondering if you could help me out a bit here. I have a choice to take either a module on stochastic dynamics in statistical mechanics or quantum computing for my masters. Both seem really interesting so it’s a close tie between which one has more current/future applications. The...

I have a Hamiltonian represented by a penta-diagonal matrix The first bands are directly adjascent to the diagonals. The other two bands are N places above and below the diagonal. Can anyone recommend an efficient algorithm or routine for finding the eigenvalues and eigenvectors?

I study Physics and my major requires me to take 6 optional courses in any area of my interest. I am interested in pursuing a career as a programmer, but my university doesn't allow me to choose Computer Science courses due to their high demand. Perhaps I can take one or two CS courses but...

This may well be a textbook question, or even a duplicate in this forum, but I have no idea of how to compute the capacitance between two conductors in the general case: all the computations I saw in textbooks make heavy use of symmetries to compute the capacitance, e.g. capacitance between two...

Homework Statement [/B] The question is phrased in the following way: There are 6 jobs to be assigned to 5 people. Each job is assigned only to one person, and each person must have at least one job. How many different arrangements are there? Homework Equations In general, I would approach a...

Hello everyone! I am very new to programming and am beginning to struggle in studies. I have been working on this same problem for about 5 hours and cannot for the life of me get this thing to compile correctly. Any assistance or guidance for what I should do would be greatly appreciated. Ask...

I've been doing a course on Quantum Computing and I haven't managed to figure out so far how entanglement would be a useful resource on a general purpose quantum computer. By general purpose quantum computer I mean some theoretical device that could possibly replace current classical computers...

I am trying to numerically solve a PDE, and just had a question as to the validity of a certain approach. For example, given the PDE: $$ \frac {\partial ^2 E}{\partial t^2} = - k\frac {\partial E}{\partial t} + c^2 \frac {\partial ^2 E}{\partial z^2} - c\frac {\partial E}{\partial z}$$ If I...

I did as much research into UPS units as I thought I needed in order to understand all of the top level jargon, but the fundamental issue of whether the appliances plugged in will be physically protected hangs over the entire industry (for domestic use). For example, a CyberPower UPS unit...

Dear all can anyone help me to understand why gravity in 3 dim doesn't have local degree of freedom. How can i compute the degree of freedoms for gravity in and dimension D. If i consider massless gravity in 3d is the graviton propagating

if you have an object weighing 50kgs, and you have to move it forward with a distance of 500m, no time given, what force do you need? Force is equal to the product of mass and acceleration? acceleration is not given.

Hello to everyone, I've just started my PhD in Mechanical Engineering. And we've to buy a computing machine of high end to use ABAQUS and COMSOL software. Can anybody recommend the machines which can run these both software. P.S: We have to use Windows because there seems to be some graphics...

I am starting my PhD soon, and I want to properly start learning linux. I have mainly used windows for most of my life, but I have been apart of two research placements using linux mint, where I did simulations attaining to Nano-Photonics. I am curious as to if you guys have any opinion on the...

Hi, I am starting my PhD in a few weeks, I am in desperate need of an upgrade. My laptop has finally died after 5 years of service. I will be dual booting Linux and Windows, so a Thinkpad seems a solid option regarding my budget. I really can't afford to spend a whole lot. I will be reading...

Hi, I was recently following an example shown in this link and just had a couple questions: http://www.scientificpython.net/pyblog/solving-the-2d-wave-equation-and-making-a-video-of-the-solution I believe I understand the steps, but was just not quite understanding the justification. In the...

I am trying to find and solve the geodesics equation for polar coordinates. If I start by the definition of Christoffel symbols with the following expressions : $$de_{i}=w_{i}^{j}\,de_{j}=\Gamma_{ik}^{j}du^{k}\,de_{j}$$ with $$u^{k}$$ is the k-th component of polar coordinates ($$1$$ is for...

As a senior in college studying IT , I am just learning the barebones principles about database construction, Object oreinted programming, with the intent of preperation for entering the job market. But I have always had a passion for Computers and technology in general. I understand that...

Quantum computers are in use now.

So I'm entering my second year in uni doing a physics degree. We're just about to tackle on some of the interesting topics like EM (which I've self-learnt before), Classical Mechanics(we've already covered Newtonian) and QMech. Apart from my core academics, I'm interested in pursuing some...

I've read many articles on "breakthroughs" in new computing technologies however that's the last I ever hear of it. I was told that for the short term, multi core computing would likely see some advancement. What about technologies that could completely replace silicon chips like carbon nanotube...

8.4.2 $$\int {x}^{2}\cos\left({x}\right)\ dx = {x}^{2}\sin\left({x}\right) -2\sin\left({x}\right) +2x\cos\left({x}\right) + C $$ $$uv-\int v \ du $$ $$u={x}^{2}\ \ \ dv=\cos\left({x}\right)\ dx $$ $$du=2x \ dx \ \ \ \ v=\sin\left({x}\right)$$...

Hi, I am an undergraduate student from India. Pursuing double major in Physics and Mechanical Engineering. I have completed 4 semesters(2 years) of my college. I had taken a class titled "Quantum information and computing" and it interested me a lot. I really love math and computations...

So in quantum mechanics, there are at least three different kinds of measurement operators: the General, the Projective, and the Positive Operator-Valued (POVM). They have different properties and relationships. In a typical QM book, these are not delineated, but in Quantum Computing they are...

This week, in Sydney, there was the announcement of not one but TWO Quantum Computing centres opening at two rival universities (UNSW and USYD). There was a feature on one of the current affairs shows here with the very charismatic guitar-playing professor of one of the centres, which has had a...

Hello there, Id like to estimate how the resistivity due to electron 'collision' with 1st Brillouin zone changes as a function of number of valence electrons in a metal. Say you start with Na, then add some other material with 2 valence electrons instead of 1, then the fermi wavevector will...

Homework Statement We are given a paramagnetic system of N distinguishable particles with 1/2 spin where we use N variables s_k each binary with possible values of ±1 where the total energy of the system is known as: \epsilon(s) = -\mu H \sum_{k=1}^{N} s_k where \mu is the magnetic moment...

In my opinion, Justin Trudeau is the epitome of what a Prime Minister should be. Here, in this video, Justin talks about quantum computing:

I have just finished my 2nd year of undergraduate study, which had the first pass of QM in it. I want to do a PhD in Quantum information/computing. What can I learn in my own time to get me closer to understanding QM information/computing? Currently I only know what we covered in lectures, and...

Hi, I have this math problem where I need to find the scalar component of acceleration at a given time under certain conditions. Usually these problems aren't bad for me, but this one has left me scratching my head. Its giving me ||a|| = 4 and (aT)(T) = 5i +5j -k I have the formula aN =...

Hi Everyone, I am very ignorant and uneducated but I have a few questions about a difficult thought experiment. 'How does time flow in a video game/simulation or even in our imagination in relativistic terms?' Let's say a processor operating at 4.2 Ghz, 42 billion instructions per second at...

Simple geometry can compute the height of an object from the object's shadow length and shadow angle using the formula: tan(angleElevation) = treeHeight / shadowLength. Given the shadow length and angle of elevation, compute the tree height. #include <iostream> #include <cmath> using namespace...

To what degree should I study each of these fields in order to be prepared for a career in quantum computing R&D? Electrical Engineering Computer Science Physics I plan to major in all three topics, but with which program(s) should I pursue higher education? I realize computer engineering is...

Given a Yukawa coupling as a function of scale and a vev, how can I compute the corresponding pole mas? Understandably most paper explain how from a measured pole mass one can compute the running mass, for example, Eq. 19 here. However I want to compute the pole mass from the running mass. In...