The Quantum Pontiff

Archives for July, 2009

Quantum Police, Arrest This Woman

Okay this one from ScienceDaily made my day. No it made my week. The title is “Police Woman Fights Quantum Hacking And Cracking.” Intriguing, no? Who is this mysterious police woman in quantum computing? I don’t know many police offers involved in quantum computing, but yeah, maybe there is one who is doing cool quantum…

Asteroids!

A widget to watch out for wayward asteroids: JPL’s Asteroid Watch Widget tracks asteroids and comets that will make relatively close approaches to Earth. The Widget displays the date of closest approach, approximate object diameter, relative size and distance from Earth for each encounter. The object’s name is displayed by hovering over its encounter date.…

Since it seems that the “arXiv on your hard drive” is dead I’ve been thinking a bit about if there is a better way to achieve the goal of distributing archives of the arXiv. One thing I liked about the “arXiv on your hard drive” was that it used BitTorrent. This could alleviate some of…

Help Rod With His Summer Reading

Rod Van Meter is in search of some summer reading: I’m feeling the need to recharge my store of ideas, and I have the nagging feeling that my lack of currency in a bunch of fields is causing me to miss some connections I could use in my own research. So, I’m looking for a…

OMG QIP=PSPACE!

Today on the arXiv an new paper appeared of great significance to quantum computational complexity: arXiv:0907.4737 (vote for it on scirate here) Title: QIP = PSPACE Authors: Rahul Jain, Zhengfeng Ji, Sarvagya Upadhyay, John Watrous We prove that the complexity class QIP, which consists of all problems having quantum interactive proof systems, is contained in…

A new entry in the best title every contest, arXiv:0907.4152: Born Again Authors: Don N. Page Abstract: A simple proof is given that the probabilities of observations in a large universe are not given directly by Born’s rule as the expectation values of projection operators in a global quantum state of the entire universe. An…

Diary of a Sad Physicist

Writing a blog is for me (1) amusing and (2) amusing. Can anyone take anything that I write on a blog seriously? Well sometimes people do. Many eons ago (okay, I lie, it was 2005), I wrote a post about the then new “h-index.” The h-index is an attempt at trying to find a better…

Various and Sundry

Two notes from Caltech of interest: Michael L. Roukes’ group at Caltech has produced a NEMS (nanoelectromechanical system) device which can (almost) measure the mass of a single molecule (as opposed to the many tens of thousands (is this the correct amount?) needed in mass spectrometry.) Build a 2 micrometer by 100 nanometer NEMS resonator.…

Moonquakes

As someone who was born on a lunar eclipse (explains a lot, no?) the 40th anniversary of man walking on the moon has a special place in my heart. Okay, that sentence makes no sense (I was born on a lunar eclipse however), but anyway everyone is all abuzz about the anniversary of the moon…

The Great Firewall of Collaboration

A fellow quantum computing researcher of mine recently joined FriendFeed. Along with another researcher we got involved in a discussion about a paper concerning a certain recent claimed “disproof of Bell’s theorem.” (arXiv:0904.4259. What it means to “disprove a theorem” like Bell’s theorem is, however a subject for another comment section on a different blog.)…