Posts tagged: Quantum Time

Philcon 2019 — Precap

Lagrange's tightrope, balancing kinetic & potential energy
Working out the effects of quantum mechanics on time requires a delicate balancing between kinetic & potential energy; Lagrange showed the way

The Philcon 2019 schedule is up. I’m doing my Time Dispersion in Quantum Mechanics talk — the tightrope walker is one of the slides, gives you a sense of the style of the whole, balancing ideas against math, time against space, classical against quantum, … — and four panels, all interesting. The con runs from Friday 11/8/2019 through Sunday 11/10. Details:

LOOKING FOR LIFE IN OUR SOLAR SYSTEM

Fri 8:00 pm. John Ashmead (mod), Earl Bennett, Dr. H. Paul Shuch, John Skylar. What’s the latest evidence that we’ve found? Where are the best places to look?

TIME DISPERSION IN QUANTUM MECHANICS

Sat. 4:00 PM. John Ashmead. We know from quantum mechanics that space is fuzzy- that particles don’t have a well-defined position in space — and we know from special relativity that time and space are interchangeable. So shouldn’t time be fuzzy as well? Thanks to recent technical advances in measurements at “short times” we can now put this to the test. Discuss!

THE BLURRY LINE BETWEEN CUTTING EDGE AND PSEUDOSCIENCE

Sat 5:00PM. John Ashmead (mod), Charlie Robertson, Rebecca Robare, Dr. H. Paul Shuch, Carl Fink, Lawrence Kramer. Niels Bohr famously said, “Your theory is crazy but it’s not crazy enough to be true”. How do we keep an open mind but not one so open that our brains fall out? A look at how to tell strange-yet-true science from weapons grade balonium.

THE EVOLUTION OF MARS

Sat 7:00 PM Darrell Schweitzer (mod), John Ashmead, Tom Purdom, James L. Cambias, Earl Bennett. How have depictions of Mars changed in SF from the imaginings of Burroughs and Bradbury to the Mars we know now from studying its surface?

DYSTOPIA NOW

Sat 9:00 PM Hildy Silverman (mod), John Ashmead, Karen Heuler, B. Lana Guggenheim. No one should be surprised that climate change, technological over-reach, and political anxieties have translated themselves into a bumper crop of contemporary dystopian fiction. How coherent are their messages — and how good are the stories? Is there a way to make such a work more than a cautionary tale about the present era’s problems?

Capclave 2019 — Recap

Alice & her dog examine the mysteries of time and quantum mechanics, slide from my talk at Capclave 2019.

Had a great time at Capclave. It’s one of the smaller cons — slightly north of 300 people — and doesn’t have some of the usual con stuff like an art show or cosplay. But for precisely those reasons, you tend to have more of those repeated one-on-one conversations that, for me, are the real life of a con.

Had a good time at the five panels I was on. All were energetic & held the audience.

Technospeed — is technology moving too far too fast? — was the first (Friday evening), with the smallest audience. It was hard to know what to do with the subject, a tad too broad I suspect. Much of the discussion focused on AI, a better subject. (I may take AI that for my big talk next year.) Not a bad panel, with that said: we had a lot of fun with Kurzweil’s Singularity and related topics.

My next two panels (both Saturday), The Coming Civil War & Failed SF Predictions, both had Tom Doyle as moderator. He did a great job, particularly with the Coming Civil War, where he asked the assembled panelists how they would treat present various scenarios from a fictional point of view. How would you tell the story of cities war with the country side? and so on. Kept the conversation from degenerating into what they thought of the [insert-derogatory-noun]-in-chief.

I had a bit of fun with Failed SF Predictions, bringing in some books of pulp age cover art: jet packs, menacing octopi, orbiting cities, threatening robots, giant computers, and attacking space fleets, … The role of women in SF in the days of the pulps is nothing like what it is in the real world today; a lot of the Failed SF Predictions chosen were about gender issues. Not even the first wave of feminist SF writers — LeGuin, Joan Vinge, Joanna Russ, … — fully anticipated how much the field would evolve.

Sunday my first panel was on Secrets of the Dinosaurs. The other three panelists were the GOH Robert Sawyer (author of the Far-Seer trilogy of dinosaur novels), Michael Brett-Surman (Collections Manager of the National Dinosaur Collection at the Smithsonian and co-author/editor of several dinosaur books with Dr. Thomas R. Holtz) and Dr. Thomas R. Holtz (who is the T. Rex of T. Rex scholarship). Being on a dino panel with these three was like being a small mammal in the Jurassic. The primary objective is to not get underfoot and squashed. All three are immensely polite & courteous individuals, who would never think to squash a small mammal who wandered on to the planet panel. I took advantage — as the designated amateur — to ask about dino parental care, how did hadrosaurs defend themselves against a T. Rex (rather easily — those tails are not just ornamental!), and my final q: if dinosaurs lived in groups & relied on visual & auditory display, did they have barn-dances?

My final panel was Exoplanets. My fellow panelists (Inge Heyer & Edward Lerner) were both expert & I had done a fair amount of swotting, so we had a good time going over rogue planets between the stars, planets made of diamond, life within the hidden seas, and various methods of finding new exoplanets — the total of confirmed exoplanets is 4000 & counting!

And my Time Dispersion in Quantum Mechanics talk went well (Saturday afternoon). I had a couple of practice run-thrus with a “volunteer” audience, which left it leaner, shorter, and easier to follow. Same content, but no math (except E=mc-squared, which is so familiar it doesn’t count). Talk went well, good audience and great questions: some I answered there, some I dealt with in the hall discussions, and one or two I had to admit “that’s one for the experimentalists!”

And my thanks to Brent Warner of NASA, who corrected — with great politeness — a couple of soft spots in the presentation. I will incorporate into the next iteration, in two weeks as it happens at Philcon.

And the next morning I got what I think is the best compliment I have ever received: the father of a 10th grader said his daughter was so inspired by my talk she is thinking of going into physics & quantum mechanics. “Here’s my email; tell her to feel free to follow up!” Yes!

Why quantum time?

Why quantum time?

A few years ago I was looking for an interpretation/formalism for quantum mechanics which would be manifestly symmetric between time and space. The first question I had was:

Is time already quantized?

Is time treated using the same quantum rules as space is? can quantum mechanics be written in a way which is manifestly covariant?
Read more »

“Quantum time” slightly less fuzzy: clean copy up.

I’d like to thank Ferne Welch and Arthur Tansky for copy-editing the previous version of “Quantum Time“.  It bears a significantly greater resemblance to English now!

And I would like to thank Jonathan Smith and also Mark West and Ashleigh Thomas for help in getting setup at University of Pennsylvania.

If anyone knows a bibtex style that handles electronic references well, please let me know.   If no suggestions, then I think I will warm up learning Old Kingdom hieroglyphs, then tackle bibtex.

All comments on Quantum Time are very welcome.  I’m planning to fold such into the great work of time as appropriate, then, if not too discouraged, push Quantum Time to the archive.

Thanks!

John Ashmead

Quantum time – Overview

In relativity time and space are treated symmetrically but in quantum mechanics the treatment of time is very different:  in quantum mechanics time enters as a parameter, not an observable.

In my dissertation, I bridge this gap from the quantum mechanics side by quantizing time using the same rules as for space and then seeing what happens.
Read more »

Greetings and felicitations!

I’ve set this blog up to explore the intersection between time and quantum mechanics.  Both subjects are interesting in their own right, the intersection rich with possibility. No shortage of topics!

Cheers!

John Ashmead

WordPress Themes