Quantum computing Definition and 253 Threads

The most serious challenge to engineering a quantum computer is protecting it from decoherence. But FMO proteins in photosynthetic complexes can exhibit entanglement for a few picoseconds as reported here and here, among other places. So would it be possible to build a working, useful quantum...

I'm a computer science and engineering student, who has recently developed interest about quantum computers. I can understand that quantum computers are totally linked with quantum mechanics. But I would like to learn whether there is any relation between quantum computing and quantum field...

Hello, first off, I'm not sure if i have placed this question under the correct forum, so i apologise for that. Secondly, i don't really know what quantum computing is, I'm basically guessing... To give you an idea of what my understanding of certain ideas might be, I start my...

Hey guys, I´m really interested in Quantum Computers and i´d love to work on them. I´ll have to decide my carreer soon, and i wanted to know what should i study, either Physics or Computer Science? I know that eventually I´ll have to study both...but what makes more sense to you guys?. Thanks!

Hello, I am an undergraduate junior majoring in ECE. Right now I am still taking my core major classes but soon I need to specialize. I am very interested in computer hardware and software and would not mind at all graduating with Computer Engineering. But in the future, maybe after grad school...

What is Quantum computation? And what is the scope in this field at present and in near future?

Can someone explain to me what sort of things quantum computers can/could do, based on their differences in their design, that are harder for conventional computers? So far I have a list that consists of 1) integer factorisation. I was hoping someone could extend that for me! :-) After all...

I'm a third year physics student and just wanted to know for the future, what books should I get in order to learn more about Quantum Computing (theory behind it)? I know Quantum Mechanics books, yes, but what else like after graduation? Thanks so much! So far on my list is just books on...

Asked myself that question today, and I don't know what the answer is. Maybe I missed something somewhere in the math... Anyone know?

I have some questions about the very new and theoretical field of quantum computing and would love to learn more. Is, or are there any good informational places where I can learn more? I have already looked at the wikipedia page but it simply left me in wanting.

Hello people of physics I am writing a paper for an undergraduate quantum mechanics course (my second quantum course) on the following topic The role of entanglement in quantum computing Just wondering if somebody could recommend a good paper or a good book on this topic. Any suggestions...

Hi All - My name is Dan Sandberg and I am studying physical chemistry at the Univ. of Connecticut in the USA. I recently heard a talk on quantum computing and, at the time, began to picture a quantum computer which employed a photoactive protein. I decided to attempt to see this idea to...

Hey , I want to know about the courses in quantum computing at univ. of waterloo or IQC or perimiter institure for international students and also the procedure and other formalities to apply there??I have done masters in physics and currently having a 2 year IT exp. under my belt. i want...

I know this is a rather new field of research and that I may seem rather silly for asking, but I would like to know besides upper divison undergrad quantum mechanics ( which I've already studied ), what other subjects should I learn to get the basic background for researching quantum computers...

Can someone give me a layman's explanation for the Qubit? And, like the bit, does it represent an intangible, or does it have some material quality to it?

I wanted to get into research and so far it seems like a fairly easy process. I want to delve into the world of quantum computing, but unfortunately there are currently no professors at my school who research that topic. So I wanted to start my own research team with a professor and find a way...

Alright, I'm just getting my feet wet in the world of physics, but, I've taken a particular interest in quantum mechanics/physics. And, my first question is, what is the point of quantum computing? It's my understanding (Though it's probably seriously flawed) that quantum computations are used...

Hi gays, Can anyone help me to find an excellent university in Canada that offers Msc and Phd on Quantum computing?

I recently took a great interest in topological quantum computing - so great an interest I am even considering it as a thesis topic for grad school (though I am still a junior undergrad and have awhile to figure that out). What would be some useful courses to take to pursue theoretical research...

In the last step to get result from a quantum computer, measurement is required to collapse the quantum state. This can be done by the measuring a large ensemble average of same computed result. One realization I know is to use NMR to measure billions of spin. So, what is the minimum number of...

Who if anyone has a good knowledge base on this topic, I am really intreged to get on bored with a bunch of people with this topic as I want to study this at UNI, Anyone that has any skills, knowledge or experience working with such field post in here I am very basic when it comes to this but I...

Hi guys, I'm really interested in doing Grad study in the area of Quantum Computation (in Canadian U.). My background is B.Sc. in physics and Com Science and M.Sc in Com science. From my understanding, QC can be heavy in the field of physics for the HW part that they're trying to find a...

Just wondering if anyone on this forum has an extensive knowledge that they would like to share. I've heard that the basic concept in quantum computing has something to do with representing binary information with a variable 1 or 0. Something like that. I was trying to follow but it was very...

this seems like a very interesting thing but what I don't understand is what is representing the quantum bit? the atom itself? the particles in the atom? an ion? or what. I am a little confused with it all. And what is representing the value of that particle or whatever. Is it its spin or...

Quantum Computing -- good, active field? I had the chance of working in the summer on quantum cryptography. Unfortunately I was rather isolated so I didn't get a good sense of the scope of the field. Now I want to specialize in it, but I fear it might lead to a dead field. Any advice?

I'm interested in doing research in quantum computing. By that I mainly mean the algorithms and theoretical computer science part, not the experimental part. How much quantum mechanics do I need to know for that? Is the standard undergraduate Griffiths level enough? Do I need to know quantum...

Quantum computing and Nanoscale "CAD" Reading a book on Nanotechnology and venture capitalist Steve Jurvetson makes the statement that traditional computer aided design, like one might use to test an airplane wing design, is not powerful enough to work at the quantum level in designing...

Suppose you were given \sum_{i=0}^{2^n}\left| i\right>\left| f(i)\right>, is there something you can do so that when you measure in the computational basis, you have a large chance of getting a particular desired \left| i\right>\left| f(i)\right>?

Hi! I'm currently doing final year engineering in Computer Science. I've read some documentations about Quantum computing and I have a strong impulse to pursue a career in Quantum computing. The problem is I am very weak in Physics and it is been past four years I forgotten eveything what I have...

are there any introductions out there which are aimed for physicists? I ask as its really interesting to me however I have very little background in comp sci or EE

Hi, My school offers this new course called Quantum Computing - it's offered by the Math Department. Can somebody please explain to me what Quantum Computing is? What kind of math would be involved in this course? Number Thoery? Algebra? Etc..

This question is from a lay person. LoL Quantum computing and it's associated research seems to be based on quantum superposition etc. 1 & 0 Why has the old 1 & 0 method of computation been carried over to and by Quantum researchers . It would seem that if you want faster and faster...

Hi everybody, A Canadian company named D-Wave, claims that it has already built a 16 qu-bits computer. This is their website address : http://dwavesys.com They also claim the technology they use is "easily" scalable, and they foresee a 512 qu-bits version in the beginning of 2008, and a...

Hello I am reading Nelson and Chuang's book on Quantum Computation. On pages 26-7 they describe quantum teleportation. I am facing essentially a math problem in going from the expression \left|\psi_{2}\right> = \frac{1}{2}\left[\alpha(\left|0\right> + \left|1\right>)(\left|00\right> +...

I'm writing a paper on quantum computing. First question: Do entangled qubits, or generally, entangled particles occupy the same Hilbert space? Thanks.

If I remember right Paul Davis in his book 'Parallel Universes' suggested that each possible position of an electron represented its place in an atom of a corresponding parallel universe. Does this or a similar/associated principle apply to the operation of quantum computing?

I have one critical problem with quantum computing. When I have one quantum state on bloch sphere, I do some transformation on that state for example PauliX transformation. As far as I know, we can present quantum state as |y> = cos (theta/2) |0> + e^(i*phi) sin (theta/2) |0> So if we...

Hi, Does anyone remember a recent article on quantum computing where they describe incredibly fast computing, even faster than light communication. It describes this as a result of quark pairs being made at the same time. It says being made at the same time they come out as if they are...

QC requires atoms to be isolated? because the slightest disturbance can cause its state to be changed and data loss. Are the spin/ angular momentum etc. of a particle affected by em waves? if there's quantum fluctuations in space, so u have virtual particles/energy swapping, and its impossible...

I have a lot of questions Please help me bridging the gap betw classical computing and quantum computing...please.. I can do mathemtic like |0> + <1| on paper and write more computings like that. But I don't understand how to code it in my toshiba computer ? I have some books+materials...

First of all I want to say hello to everyone on these boards, so hello! Everything I say is speculation only from what I've read, for all I know I could be speaking jibberish and not know it. I read a few things about QM, mostly for quantum computers and I came across something that talked...

Can you show me how to use quantum computing language ? I have download qcl6.0 but i don't know how to use it ?:confused: and have you know any solfware can simulate quantum structure ? :biggrin: help me if you can

Where do these fields overlap (if at all) and where do they differ? If one was doing Nanotechnology at the graduate level with a BSc in physics behind them, what kinds of courses would one be taking? What about for Quantum Computing?

Is it theoretically possible to simulate a quantum computer by a real one (ie a Turing machine equivalent) even approximately? Any comments? Sorry if this has already been discussed. :confused:

i have to do a report on quantum computing for school, and i was wondering if anyone knew any good places to find it

I am interested in quantum computing, but presently have no clue as to where should I start. Could you suggest some topics in the field for me to go ? Some simple ones that I can finish them in one year ? Could you ? Thanks a lot

What is a quantum computer in short ? what does it look like ? Can it be as fast as a present super computer ? Another, beside crypto, what can quantum algorithms do ? Can they do something good like genetic algorithms ? :redface:

Hi Does anyone know which universities in england and US do post graduate study in Quantum Computing? Raj

I have read with interest the previous post on this topic, but wonder, I recently read an article about the first quantum transistor, a small step on the path to a true quantum computer, and also some articles on using argon atoms and electrons as ram and a bus respectively; can anyone however...

this seems strange spin networks are the quantum states of gravity in one approach to it (LQG) this paper treats them as quantum computers I cannot tell if ...I can't tell anything about this. some remarkable diagrams way at the end, and nice numbers like the Catalan numbers...