Tuesday, July 01, 2025
Process philosophy, quantum mechanics and quantum computing
Wednesday, April 09, 2025
Liberty, antisemitism, authoritarianism
Saturday, March 22, 2025
Town hall meeting during dangerous times
Monday, February 17, 2025
Electron beams, stochastic processes and quantum mechanics
As the US government is
taken over by Musk, Fascism solidifies and plans are carried out to
destroy government infrastructure and our world-class science as well as
undermine civil rights. Meanwhile I'm stuck inside, w/ a minor cold
(snow and low temperatures in Colorado). I'm trying to get an
application done for Denver University physics department by Saturday. I
didn't succeed with the CU Boulder application, which was
disappointing, though not so surprising. There are also some open
positions at Colorado School of Mines I may apply for. Of course, the
political changes make all of this a lot more uncertain.
Meanwhile,
I'm reading a lot about stochastic processes to go back to my PhD
thesis and try to give a clearer formulation of intrabeam scattering and
synchrotron radiation for spin depolarization in high energy electron
storage rings. I'm reading books and papers on stochastic differential
equations: white noise, Ito calculus, Wiener process, Fokker Planck
equation, etc.
I've also been trying to understand Jacob Barandes' "Stochastic Quantum Correspondence" https://arxiv.org/abs/2302.10778
It
gives a mapping between a quantum system with a Hilbert space,
Hamiltonian and unitary maps, and a general stochastic process with
transition probabilities. If the stochastic matrix factorizes at a given
time, then you get classical behavior, if not you get quantum behavior
(so-called divisible/indivisible processes). There are still
interpretational questions about what types of things are actually going
through this process, and Barandes is agnostic
on the ontology. Still, a lot of difficult questions, like measurement,
local causality, etc. are given easier, less murky explanations. I still
think there may be some connection to consciousness, but the discussion
is shifted and it feels more solvable. I'm appreciative of Barandes
bringing this question into a more fruitful and deep conversation with
philosophy.
Some additional commentary and possible critique on Barandes' work I've been trying to understand:
https://coexactly.github.io/blog/posts/stochastic-quantum/
Since
I don't have a job for now, I may as well try to dig deep in various
topics. Shoring up my understandings of stochastic processes and quantum
mechanics is something I've long wanted to do. Of course, the dangerous
developments of our government can take up a lot of my attention. I'm
trying to not let that take over.
I'm
hoping this material may help me with my research statement in my
application. They want someone to support a program on quantum materials
and information science, and this stuff, together with my experience
with synchrotron light sources, beamline modeling and machine learning
could make a strong application. I put a lot of time into the climate
science research statement for CU, but this material may be less of a
stretch for the committee, and maybe gives me a better chance to
succeed, even though I was excited to try to move ahead on the climate
science front.
Sunday, February 09, 2025
American Identity
Thursday, November 14, 2024
What kind of resistance for American Totalitarianism?
A lot of quotes by Hannah Arendt have been going around in my online circles in the last few days. (Here's some essays on Arendt by one of my favorite writers on technology criticism, Michael Sacasas: https://thefrailestthing.com/tag/hannah-arendt/)
Thursday, November 07, 2024
An awful election: reflections
Monday, July 29, 2024
More clarity on the limits of reductionism
Tuesday, June 25, 2024
Continuity between places
As I start to think about what I may do next, I come back to the idea that I don't want to leave behind what I've done, either work-wise or community-wise.
I heard about a job opening in Berkeley and I think about moving there. At the same time, I've been really appreciating and getting deeper into my cohousing community here in Colorado. And I appreciate my art studio and the developing community through that.
I guess if I did move back to the bay area, I'd probably look for cohousing there and for an art community there as well.
Sunday, June 23, 2024
Transitions
I'm watching the last season of Battlestar Galactica today. It feels like an appropriate story to accompany a difficult time in human history and a difficult in my life. The crew has to start over again so many times. Even though I was ready for a change, it doesn't mean it's easy. My transition after Grenoble was definitely difficult. That was 8 years, and now I've been through another close to 8 years. I put a lot into my work at RadiaSoft and it's not so clear whether much of it will continue on. Like my years in France, a long investment. I've looked for continuity in life and it's often been elusive.
The very nature of humanity is questioned again and again. And our relationship with technology is centered.
I'm worried about the upcoming election. Are people really confused enough to elect Donald Trump? And I'm worried about climate change. Will humanity find a way to come together to address this problem, or will we put our head in the sand?
I'm glad I'll have some time now to sit with all this before figuring out what to do next.
Sunday, December 31, 2023
My dad's life
Monday, December 25, 2023
Liminal time
Monday, November 20, 2023
thoughts on Israel/Palestine
Sunday, November 12, 2023
Balloons
Thursday, November 02, 2023
Life's complexity
I've been waking up at 4am recently, feeling stressed out. So many different threads in life and the world and it's hard to see how they will turn out. Getting to know people at Nyland and to understand the complex organization. The difficulties in the world- war and climate change and people not getting along with each other. And my complex job, working with a lot of different organizations, trying to do something meaningful, to help with the technology of particle accelerators at the same time as to understand the kinds of experiments done with x-rays and neutrons to understand the atomic structure of materials and elementary excitations of matter. Sometimes I feel like I'm pretty good at managing complexity and pulling different pieces together into something that makes sense, and sometimes I feel like it's all too much for me. I suppose painting has always been a kind of practice for this aspect of life. How do we pull together the pieces of this world that seem much more fragmented than any one person can manage?
Sunday, October 08, 2023
Being Mortal
Tuesday, October 03, 2023
Growing older
Wednesday, April 26, 2023
My talk at NSLS-II user meeting
I gave a talk yesterday about my work on online models and control of x-ray beamlines at the NSLS-II user's meeting.
https://www.dropbox.com/s/3qgdn3zja4bvgcl/blicon_NSLSII_UM_presentation2.pdf?dl=0
Thursday, January 12, 2023
Family story
I read journals written by my father 25 years ago and I get to know a little more about someone I never really knew. Someone who was never available to me.
I continue to try to piece together a complex story and my self that would need to be the glue, just isn't strong enough. The pieces clank together, unwieldy and not fitting. A failed marriage. A death. And perhaps my father as well was not up to the task to put the pieces together and so left it to me.
Tuesday, December 27, 2022
Tools for physics and art
Trying to get back to being able to calculate stuff in physics, I remember how important discipline and organization are. Where do you write things? Where do you put the paper when completed? If you write on a white board, how do you record it or collect the results going ahead?
And there's similar discipline associated with digital work. How to store Mathematica notebooks? At what stage to write up an argument in LaTeX? How to make a good bibliography in bibtex that you can reuse? How to store and access pdfs of reference material?
How to store and access books? Does one have a home library where one knows easily where to find Griffiths and Jackson and books on physical chemistry and non-linear dynamics? Does one have a pattern of going to the nearby library and knowing how to find books on the shelf there?
And back to digital, how to organize Jupyter notebooks? And what github repositories does one depend on? What regular habits of computer maintenance and upgrade must one have to ensure access and consistency of one's digital tools?
I feel like I moved forward haphazardly regarding all these tools and I've been left without consistent practice. On all fronts, it's more difficult to use these tools. Discipline is about making choices and following through on them.
But one needs a clear goal in order for that discipline to not be arbitrary. This vacation time is a good chance to consider both the goals and associated practice of working well with ideas and calculations.
I've also been focusing on art and painting recently. And there's also an associated set of disciplines there, that I've been slipping on. Cleaning brushes. Organizing space. Caring for materials. Yet, again, discipline without goals is sterile. A fruitful mess can be better.





