Strilanc

12 ms·

121.
by Strilanc 3y ago
Quantum error correction corrects more than just bit flips. It corrects phase flips, accidental measurement, qubit erasure, small global rotations... lots of stuff. I don't know exactly what you have in mind as "loss of entangleme
122.
by Strilanc 3y ago
Related: "Quantum computing worst case scenario: we are Lovelace and Babbage" [1] For scale: Babbage's planned analytical engine had a word size of 50 digits, a clock rate of 7Hz, and a physical size of roughly a locomotive [
123.
by Strilanc 3y ago
How would you do it quickly? For example, HTML isn't divided into numbereres pages while PDFs are. A lot of latex interacts with page boundaries. Figures tend towards the tops of pages. And there's \clearpage. And the reference li
124.
by Strilanc 3y ago
Note: I was basing my comments on the arXiv preprint https://arxiv.org/abs/2105.12466 "Indefinite Causal Order in Quantum Batteries", which I assumed was the preprint for the PRL paper. It's conceivable
125.
by Strilanc 3y ago
If I'm reading the paper right, they're just doing a bad job of explaining measuring a qubit by phase kickback. And for some reason they're talking about batteries? When they say "indefinite causal order" what they
126.
by Strilanc 3y ago
It's possible I misdiagnosed the issue. But I implemented the code and ran it and counted the solutions, and one was missing. I changed that line and it fixed it, and the solution that was missing is the one I described. In any case, i
127.
by Strilanc 3y ago
Nice. You need to initialize x to 0 instead of -m&m though, or you miss the solution with x=0.
128.
by Strilanc 3y ago
Here's an example. In SQL the "select" clause comes at the start. In C# LINQ queries, "select" comes at the end. A major resulting difference is autocomplete works in the latter case but not the former. A more perva
129.
by Strilanc 3y ago
I like these kinds of bit twiddling puzzles. One that I recently did was for iterating over possible errors of weight w in a quantum stabilizer code (for [1]). In a classical code this would just be the problem in the blog post, since there
130.
by Strilanc 3y ago
If x is n bits long, it's undefined behavior to evaluate x >> n. You can only shift by amounts smaller than the register width. IMO this is one of the more annoying instances of UB. Precisely because of situations like this, wher
131.
by Strilanc 3y ago
I'm sure you're familiar with the arguments. It's the explicit goal of several AI companies to make something more capable than us at engineering. Once you have that, there's the possibility of very rapid self-reinforcin
132.
by Strilanc 3y ago
You're worried about winning the race. I'm worried the prize is an accidental intelligence explosion killing everyone. A government slamming on their brakes would be the most encouraging thing I've heard all year.
133.
by Strilanc 3y ago
You also probably want post-quantum crypto if you're making anything that can be updated, and there's a chance the thing may sit in a drawer for 10 years before being connected to the internet. The crypto you use to authenticate a
134.
by Strilanc 3y ago
For the record, I did recognize the name. That's why I believed talking to them was useful.
135.
by Strilanc 3y ago
Honestly, I'm kind of skeptical of the answer. I'm not saying that talking with Nyquist wouldn't be useful, probably it was, but what's stopping a dozen other things at least that useful from being part of the answer?
136.
by Strilanc 3y ago
One of the major shifts in my coding style over the past ten years has been to increase the amount of duplication. My threshold for "I should really dedupe that" increased from ~3:7 lines to ~10:50. Looking back this was driven by
137.
by Strilanc 3y ago
> NEO: Haven't you ever heard of the laws of thermodynamics? > MORPHEUS: Where did you hear about the laws of thermodynamics, Neo? > (Pause.) > NEO: ...in the Matrix. > MORPHEUS: The machines tell elegant lies. Paraphras
138.
by Strilanc 3y ago
Just because you could operate superconducting qubits at high temperature doesn't mean you would. By far the biggest problem for qubits is noise, and raising the temperature would increase noise. I won't claim a high Tc supercondu
139.
by Strilanc 3y ago
Awesome. Something I noticed in the plot where you can add points is that it's not actually using the continuous version of the transformation to interpolate the paths. It looks like the points are being linearly interpolated between i
140.
by Strilanc 3y ago
Where is the linked post getting the 4:1 vs 1:2 time-spent-on-falsification ratios that it's claiming? It's like the heart of the entire argument, but it's not sourced. Edit: Ah, okay, it's probably in the book being dis
141.
by Strilanc 3y ago
The hardest part of implementing a quantum state vector simulation is understanding how the tensor product expands an n-qubit gate to apply to an m-qubit system. (A third of the linked post is dedicated to it; appropriately.) If you use a l
142.
by Strilanc 3y ago
from google scholar search: https://www.ams.org/journals/mcom/2003-72-241/S0025-5718-02-...
143.
by Strilanc 3y ago
To me it seems simpler to suppose the artist is drawing everyone (including themselves) in the same distorted way, as opposed to imposing themselves into everyone. Ideally you'd have a photo of the artist for comparison, instead of a s
144.
by Strilanc 3y ago
The key detail you're missing is that the problem must be written down . All details must be specified, so that you can unambiguously tell how well it's being solved. Yes, you can write down a problem inspired by a specific stick
145.
by Strilanc 3y ago
The rule I omitted from the quote was "hospital affiliation". In the paper, they try a variety of combinations of rules, including some where failing any one rule classifies the paper as fake. The meat of my complaint remains even
146.
by Strilanc 3y ago
Reading the paper it seems like a pretty accurate description. The paper just calls it a "private email" instead of a "non-institutional email". For example (@@@ emphasis is mine): > To identify indicators able to re
147.
by Strilanc 3y ago
> Sabel’s tool relies on just two indicators — authors who use private, noninstitutional email addresses, and [...] Uh huh. I didn't realize until today that all my papers are fake because I give contact information that won'
148.
by Strilanc 3y ago
The problem of "find a series of bytes that is a valid transaction sending these bitcoins to me" is an NP problem. When you can solve arbitrary "find satisfying input" problems, details like "the public key is hashe
149.
by Strilanc 3y ago
> So I can't tell what any of this is supposed to mean at all? Quantum mechanics is defined by three axioms: 1. States are unit vectors. Vectors whose 2-norm is 1. 2. Operations preserve the 2-norm. They are described by unitary mat
150.
by Strilanc 3y ago
> Shor's algorithm requires not only the logical qubit to be stable (the superposition of 1 and 0, but also the phase [..] to be noise free to an extraordinary degree. There are rotations in very small angles many, many times in the

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