 $, which suppress offdiagonal components of the reduced density matrix, leaving a diagonal mixture of different classical configurations. Gravitational nonlinearities thus provide a minimal mechanism for generating classical stochastic perturbations from inflation. We identify the time when decoherence occurs, which is delayed after horizon crossing due to the weak coupling, and find that Hubblescale modes act as the decohering environment. We also comment on the observational relevance of decoherence and its relation to the squeezing of the quantum state.’]

Right now I am wondering as to whether this can be connected to Crooks fluctuation theorem. (The Jarzynski equality is a special case of Crooks, and the second law is a special case of Jarzynski.) It also makes me want to spend more time reading Fleming’s imposing thesis, which is essentially a textbook on open quantum systems.

Look at how amazing this nested mirror is from Fig 1:
That’s a real optical photograph! And they think that they will cool it to the ground state in the future.

H/t John Preskill, who advises you to take this seriously despite the many problems with previous attempts at finding quantum computation in the brain. See, e.g., Tegmark’s “The importance of quantum decoherence in brain processes”.
LaTeX in comments
Include [latexpage] to render LaTeX in comments. (More.)Recent Comments
 How to think about Quantum Mechanics—Part 1: Measurements are about bases (11)
 Jess Riedel Thanks Teddy. Honestly I can't remember what I was trying to say with that condition... – Apr 06, 11:06 AM
 Teddy Parker In your "Implications" section, when you say that a normal operator is "nonsingular", do you... – Apr 06, 10:52 AM
 Wigner function = Fourier transform + Coordinate rotation (6)
 Ninnat Dangniam [latexpage] Mahmoud, one has to be careful how to define “quantumness” based on the negavitity... – Dec 28, 1:54 AM
 Mahmoud Now I know that the negative values of Wigner function represents of the nonclassical state... – Sep 13, 1:18 PM
 Jess Riedel Thanks Lucy. Sorry about the spam filter; the options provided by Wordpress are crummy and... – Aug 26, 8:39 AM
 Lucy Keer Oops, that was a bit unclear  meant to say that I tried to add... – Aug 26, 7:45 AM
 Lucy Keer Thanks very much for writing this up! I had very similar frustrations recently in trying... – Aug 26, 7:40 AM
 Links for AprilMay 2018 (8)
 Devin Bayer Hi Jess, I found your blog via another physics blog and subscribed because I found... – Aug 04, 3:29 PM
 Top posts (2)
 Jess Riedel Howdy Don. This one isn't very sophisticated. I saw a comment on a funny cat... – Jul 28, 11:37 AM
 Don Wright Jess. Greetings. Wondering where your interest in the hyoid bone and cat clavicles came from...... – Jul 28, 10:00 AM
 How to think about Quantum Mechanics—Part 1: Measurements are about bases (11)
Licence
foreXiv by C. Jess Riedel is licensed under a Creative Commons AttributionShareAlike 4.0 International License.