Recent work
M. Zwolak, CJR, and W. Zurek, "Amplification, Redundancy, and the Quantum Chernoff Information", to appear in Phys. Rev. Lett. CJR, "The Standard Quantum Limit Arising from a Preferred Basis". CJR, "Evidence for Gravitons from Decoherence by Bremsstrahlung". CJR, "Local Records and Global Entanglement: A Unique MultiPartite Generalization of the Schmidt Decomposition". CJR, W. Zurek, and M. Zwolak, "The Objective Past of a Quantum Universe  Part 1: Redundant Records of Consistent Histories". [arXiv:1312.0331][Slides (Perimeter)] CJR, "Direct Detection of Classically Undetectable Dark Matter through Quantum Decoherence", Phys. Rev. D 88, 116005 (2013). [arXiv:1212.3061][Slides (Perimeter)][Video (Perimeter)][FAQs (Blog)] CJR, "Decoherence and the Quantum Detection of Classically Undetectable Phenomena." [arXiv:1205.3195][Slides (Waterloo)][Video (Waterloo)] Charles H. Bennett and CJR, "On the security of key distribution based on JohnsonNyquist noise." CJR, Wojciech H. Zurek, and Michael Zwolak, "The Rise and Fall of Redundancy in Decoherence and Quantum Darwinism," New J. Phys. 14, 083010 (2012). [arXiv:1205.3197][Slides (thesis defense)] CJR and Wojciech H. Zurek, "Redundant Information from Thermal Illumination: Quantum Darwinism in Scattered Photons," New J. Phys. 13, 073038 (2011). [arXiv:1102.3179][Slides (Traunkirchen)] CJR and Wojciech H. Zurek, "Quantum Darwinism in an Everyday Environment: Huge Redundancy in Scattered Photons," Phys. Rev. Lett. 105, 020404 (2010).
Online PersonaHackerNews, StackExchange (Physics.SE, MathOverflow), 80k Hours, ForeXiv, Google Scholar, arXiv.Bad ways to think about Quantum MechanicsWrong: The Aharonov–Bohm effect says something profound about the "reality" of potentials in quantum mechanicsRight: Nonzero forces on source charges, obscurred by the semiclassical limit, show that potentials are just as real (or ficticious) as they are classically. Implication: "The core of the AharonovBohm effect is the same as the core of quantum entanglement: the quantum wave function describes all systems together." More: Lev Vaidman, arXiv:1110.6169. Implication: The Aharonov–Bohm effect, like entanglementenabled surpassing of the shotnoise limit, is a special case of a quantumenhanced measurement. More: C. Jess Riedel, arXiv:1205.3195. Wrong: Observables are "represented" (?) by Hermitian operators. Right: Measurements necessarily amplify, and therefore (!) are associated with an orthogonal basis. This is the Schmidt basis of the entangled joint state of the measuring apparatus and the measured system. More: Wojciech H. Zurek, Phys. Rev. A 76, 052110 (2007), [arXiv:quantph/0703160]. Also: [arXiv:1212.3245]. Implication: Observables can be associated with normal, not just Hermitian, operators. LaTeX
♦ See LaTeX in your Gmail and GChat: GmailTeX (realtime, browser plugin required).
Mathematica
Fast partial trace of multiqubit density matrix: [Mathematica Notebook] [Plain ASCII].
SoftwareAlternatives for common applications: alternativeTo. Multiple app installers: ninite. Windows software and services I use: Notepad++, Dropbox, Gmail Offline, Google Calendar Offline, Evernote, Insomnia, GIMP, 7zip, IrfanView, WinDirStat, Mathematica, WinSCP, Zotero with ZotFile, FoxIt PDF Reader, Wordpress. Panoramas(Quicktime .mov files allows one to pan and zoom)
Cabezon peak, NM, just before solar eclipse (2012520):
Inside the adventure bus (2012722):
Former institutions
Los Alamos National Lab: CNLS & T4 (20092012)
Mailing address
