Johanna Faust, a mixed race Jew, prefers to publish pseudonymously. She is committed: to preventing war, ecological disaster, and nuclear apocalypse; to keeping information available and free; and to not only fighting for personal privacy, but, by representing herself as a soldier in that fight, to exhorting others to do the same. All these efforts find representation on her blog "ah, Mephistophelis," so named after the last line of Chirstopher Marlowe's in his famous Dr. Faustus, which, as some would have it, successfully flouted the censor for a time. A female Faust, she is a poet, always.

Time Reversed (For A Brief Moment) On An IBM Quantum Computer

(above: excellent fiction. below: non-fiction. )



This is amazing, astounding -- super weird -- and real.  Not wanting to gloss this one, I will leave the paper's summary, and the paper, to speak for themselves.  If you scroll down in the former, there are links to a text-only version of the high-ad-placement easy-listening explanation from the Independent.co.uk.


Arrow of Time and its Reversal on IBM Quantum Computer 

G. B. Lesovik,1 I. A. Sadovskyy,2, 3 M. V. Suslov,1 A. V. Lebedev,4 and V. M. Vinokur2 1Moscow Institute of Physics and Technology, Institutskii per. 9, Dolgoprudny, 141700, Moscow District, Russia 2Materials Science Division, Argonne National Laboratory, 9700 S. Cass Av., Argonne, IL 60637, USA 3Computation Institute, University of Chicago, 5735 S. Ellis Av., Chicago, IL 60637, USA 4Theoretische Physik, ETH Z¨urich, Wolfgang-Pauli-Strasse 27, CH-8093 Z¨urich, Switzerland 

Uncovering the origin of the arrow of time remains a fundamental scientific challenge. Within the framework of statistical physics, this problem was inextricably associated with the Second Law of Thermodynamics, which declares that entropy growth proceeds from the system’s entanglement with the environment. It remains to be seen, however, whether the irreversibility of time is a fundamental law of nature or whether, on the contrary, it might be circumvented. Here we show that, while in nature the complex conjugation needed for time reversal is exponentially improbable, one can design a quantum algorithm that includes complex conjugation and thus reverses a given quantum state. Using this algorithm on an IBM quantum computer enables us to experimentally demonstrate a backward time dynamics for an electron scattered on a two-level impurity.

emphasis mine. Read more (or right click to download)
read it in everyday language here for convenience (the page has been Textised!  That means no ads & swift pageload). The original page address was https://www.independent.co.uk/life-style/gadgets-and-tech/news/time-reverse-quantum-computer-science-study-moscow-a8820516.html


No comments:

Post a Comment