General discussions

I am actually trying to reproduce the research paper on "Elementary gates for Quantum computation". With reference to that paper, According to Corollary 7.4 - On an n-bit network(where n>=7), a lambda(n-2)[sigma x] gate can be simulated by 8(n-5) lambda(2)[sigma x] gates(3 bit Toffoli gates), as well as by 48n - 204 basic operations. I am able to solve the first part of the corollary. In the 2nd part they say that out of the (8n-40) Toffoli gates, 4 gates can be simulated by 16 basic operations and the remaining (8n-36) gates can be simulated by 6 basic operations.

Hello All,

I am a newbie at this forum (as well as in the field of Quantum Computing) and interested to know how to establish (technically) multi-qubit computations using liquid state NMR. The only way I know is that for N qubit computations a sample with molecules each of which has N spins with well resolved Larmor frequencies is required.

Are any other possibilities else?

This is only the abstract of the paper entitled "The foundation of Probing the Universe" (because the mathematical equations and pictures in the paper do not match with the format on Quantiki). And I am looking for a help from Quantiki for this, and wish that the whole paper can be seen on Quantiki soon.

The Foundation of Probing The Universe
Tao Zhao
Dalian Maritime University
P. R. China

I am going into my senior year of undergrad as a dual computer science and physics major, I it is my intention to go to graduate school and study quantum information/quantum computing. However, I'm a little bit lost on where would be a good place to go and if I should choose physics or computer science as my course of study. Which discipline offers more opportunities in this field and what schools should I be looking at?

thanks

For some years there has been a discussion among physicists regarding stuff that falls into black holes. Each bit of stuff is associated with some information, and apparently there is a Law of Conservation of Information. Stephen Hawking showed that stuff can escape a black hole, but there has been a problem in showing how the information that fell into the hole also escapes. A possible breakthrough is described here:
http://www.space.com/scienceastronomy/080514-black-holes.html

Hello All,

Thanks alot forall who put efforts in the field of Quantum computing thriugh this great website !

In fact I am looking fro advise in my field of study.

I am a master's Student looking to work in Quantum Computing / Quantum Cryptography. BUT , I am new and have the very basic thing in QC. And next Fall i will be in my second year of Master's. I am looking for a topic to work on at leat for my masters and then build upon in my PhD. What is your advise ?

Can't mass be transmitted from one site to the destination just like
this msg and reassembled by a receiver back to the same
physical object that it was?
Quantum mechanics does wonders. So is there any such
probability in future looking through the lens of quantum
mechanics?

Let us define a "quantum of understanding" as the smallest collection of data needed to allow some fact to be understood, relative to a larger context. The previous sentence might qualify, even though it consists of a considerable number of quanta of other types (alphabet-letters and punctuation). Since we want quantized phenomena to be understood, we need them to be discuss-able.

Hi,
I came across your forum through a Yahoo search that turned up research towards the miniture world of the quanta or rather discovering it's limits.
I can tell you the answer now!
There are no limits, at least they are far smaller than you imagine. So small in fact that I can dismiss those limits for the sake of this discussion.
I have rewritten complex mathematics and as a result been able to revise quantum mechanics.
Now there is a psychological barrier for theorists to cross here.

Hope anyone who really has the interest (not just taking others' conclusions for granted) on quantum bit commitment (QBC) can share your opinion here.

In fact I proposed a QBC protocol [Phys. Rev. A 74, 022332 (2006).] and though it was not claimed to be unconditionally secure in that paper, if you look into the details you will find that it was already proven secure against the attack proposed in the Mayers-Lo-Chau (MLC) no-go theorem. Actually the protocol appeared previously in quant-ph/0303107, but for plain reasons it cannot get formally published without refraining the claim.