Month: August 2019

A Great, Modern Rambling

Mark DavisLeave a comment

I read across the political spectrum. I would say I read religiously across the political spectrum, but that is using the term in a secondary and impoverished way, which is part of my point in this particular post. When an author has no clearly defined thesis there is a tendency to ramble, or to fall back on form in the absence of content, or to play to the expectations of the audience through deliberate obscurity.

It is by a chance intersection that I encountered two ideologically conservative pieces that suffer from this tendency in the same week, but it could also be that everyone on the right is exasperated by the often vacuous—and always narcissistic—current happenings within the political parties that represent them. I sympathize with them if that’s their defense, and will also agree that the far left can be equally exhausting.

It has become de rigueur for the right’s commentariat to claim that this is not what they expect from the Party of Lincoln or, given a spat with National Review, that the magazine lacks the heft of Bill Buckley’s original ideals. If all of conservatism has become tainted by reactionaries and semi-populists, the very idea of intellectual conservatism huddles against an ever-present and threatening cloud.

So we start with Andrew Sullivan’s rambling in New York Magazine. Sullivan likes to praise the intellectual heft of those he argues against. Maybe he just likes to be pleasant and this is his way of signaling a commonality of purpose, or perhaps it’s to gird his own rejoinders as having equal weight. In this piece, it’s hard to discern why. The entire argument is a typology or map of what a center-right conservative is and is not.… Read the rest

Deep Learning with Quantum Decoherence

Mark DavisLeave a comment

Getting back to metaphors in science, Wojciech Zurek’s so-called Quantum Darwinism is in the news due to a series of experimental tests. In Quantum Darwinism (QD), the collapse of the wave function (more properly the “extinction” of states) is a result of decoherence from environmental entanglement. There is a kind of replication in QD, where pointer states are multiplied, and then a kind of environmental selection as well. There is no variation per se, however, though some might argue that the pointer states imprinted by the environment are variants of the originals. Still, it makes the metaphor a bit thin at the edges, but it is close enough for the core idea to fit most of the floor-plan of Darwinism. Indeed, some champion it as part of a more general model for everything. Even selection among viable multiverse bubbles has a similar feel to it: some survive while others perish.

I’ve been simultaneously studying quantum computing and complexity theories that are getting impressively well developed. Richard Cleve’s An Introduction to Quantum Complexity Theory and John Watrous’s Quantum Computational Complexity are notable in their bridging from traditional computational complexity to this newer world of quantum computing using qubits, wave functions, and even decoherence gates.

Decoherence sucks for quantum computing in general, but there may be a way to make use of it. For instance, an artificial neural network (ANN) also has some interesting Darwinian-like properties to it. The initial weight distribution in an ANN is typically a random real value. This is designed to simulate the relative strength of neural connections. Real neural connections are much more complex than this, doing interesting cyclic behavior, saturating and suppressing based on neurotransmitter availability, and so forth, but assuming just a straightforward pattern of connectivity has allowed for significant progress.… Read the rest