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#matrix

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📰 "Simulating quantum dynamics in two-dimensional lattices with tensor network influence functional belief propagation"
arxiv.org/abs/2504.07344 #Cond-Mat.Str-El #Physics.Comp-Ph #Quant-Ph #Dynamics #Matrix

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arXiv.orgSimulating quantum dynamics in two-dimensional lattices with tensor network influence functional belief propagationDescribing nonequilibrium quantum dynamics remains a significant computational challenge due to the growth of spatial entanglement. The tensor network influence functional (TN-IF) approach mitigates this problem for computing the time evolution of local observables by encoding the subsystem's influence functional path integral as a matrix product state (MPS), thereby shifting the resource governing computational cost from spatial entanglement to temporal entanglement. We extend the applicability of the TN-IF method to two-dimensional lattices by demonstrating its construction on tree lattices and proposing a belief propagation (BP) algorithm for the TN-IF, termed influence functional BP (IF-BP), to simulate local observable dynamics on arbitrary graphs. Even though the BP algorithm introduces uncontrolled approximation errors on arbitrary graphs, it provides an accurate description for locally tree-like lattices. Numerical simulations of the kicked Ising model on a heavy-hex lattice, motivated by a recent quantum experiment, highlight the effectiveness of the IF-BP method, which demonstrates superior performance in capturing long-time dynamics where traditional tensor network state-based methods struggle. Our results further reveal that the temporal entanglement entropy (TEE) only grows logarithmically with time for this model, resulting in a polynomial computational cost for the whole method. We further construct a cluster expansion of IF-BP to introduce loop correlations beyond the BP approximation, providing a systematic correction to the IF-BP estimate. We demonstrate the power of the cluster expansion of the IF-BP in simulating the quantum quench dynamics of the 2D transverse field Ising model, obtaining numerical results that improve on the state-of-the-art.

GOING LIVE! I'm taking a break from the emulator to work on my #matrix bot!

twitch.tv/b4ux1t3

It's a little bit for running #TTRPG sessions (currently #DCCRPG) using the matrix protocol! It's a rare occasion where I'm using _gasp_ python!

Tonight we'll be wiring up the new character code I wrote to a command in chat, and will probably need to implement some #SQLite DB access.

Hopefully by the end of the week we'll be ready to open the game up to more players!

Twitchb4ux1t3 - TwitchA software developer and gamer of pretty freaking average proportions!

Tonight, at roughly 9PM Eastern, I'm taking a break from the emulator to work on my #matrix bot!

twitch.tv/b4ux1t3

It's a little bit for running #TTRPG sessions (currently #DCCRPG) using the matrix protocol! It's a rare occasion where I'm using _gasp_ python!

Tonight we'll be wiring up the new character code I wrote to a command in chat, and will probably need to implement some #SQLite DB access.

Hopefully by the end of the week we'll be ready to open the game up to more players!

Twitchb4ux1t3 - TwitchA software developer and gamer of pretty freaking average proportions!

Quick heads up, our bridge bots on the Matrix side are continuing to get banned for an unknown reason. Therefore some channels on Matrix are no longer bridging.

IRC, Discord and Telegram remain unaffected, we will continue looking into possible solutions for the time being.

Saying Matrix is bad because the Mossad created it is like saying SELinux and AES encryption is bad because the NSA created it or saying water is bad because Hitler drank water.

They have their flaws but saying something is bad because a bad actor used it is crazy imo

I'm not defending Matrix, it's E2EE implementation is flawed UX-wise and the community LOVES drama and bikeshedding, but holy crap
#matrix #conduwuit #wtf

Today we are unveiling two brand new features by ... drum-roll ... doing nothing:

- No "AI" integration involved or planned. Consequently, you don't need to teach your relatives how to disable AI!

- No proprietary server components: servers are fast, efficient and freely replicable, no permissions needed!

Moreover, our apps are easier to use and onboard with than SIM/phone number based apps: Multi-device and Multi-profile handling is a piece of cake.

I hear from a lot of people that app overload puts them off using apps for decentralised networks like jabber, the fediverse, matrix, and nostr. What if they could install apps for all these networks, but redirect notifications from them into one? So they could check all their messages in their preferred messaging app, and tapping on a message from another app would open that app at that message.

(1/2)

Hey Fedi, been a while!

Excited to announce the first release (v0.5.0-rc.5) of Continuwuity:
➡️ continuwuity.org/
➡️ forgejo.ellis.link/continuwuat

Continuwuity is a community-led fork of the Matrix homeserver conduwuit, picking up development after the original was archived (see: girlboss.ceo/~strawberry/condu).

Good news for existing users: Continuwuity is a drop-in replacement! Just swap the binary/Docker image.
Conduwuit still runs but isn't updated; Continuwuity is the path forward.

We're a group of former conduwuit admins & contributors aiming for stability & new features. Check our roadmap/issues: forgejo.ellis.link/continuwuat

I'm not super active here, so for questions/discussion, join our Matrix room: matrix.to/#/#continuwuity:cont

continuwuity.orgIntroduction - continuwuitycontinuwuity is a community continuation of the conduwuit Matrix homeserver, written in Rust.
Finally have my Prosody server all compliant!

I had an epiphany last night about something in the nginx config and after sorting that, all the optional XEP listed also pass!

Now to convince wife and kids to use it for our group chat... they really don't want to install any more apps, because I'm "being difficult" because they already use whatsapp 😑

The main reason I'm impressed with it over matrix, is reliable notifications. It just works. So far, anyway.

Thank you to the people that replied to my post last week suggesting I try xmpp after the matrix server we used shut down. I had written it off as an old platform for nerds, but it's... actually really good ❤️

#prosody #xmpp #chat #nginx #matrix

Перешёл на матрикс-сервер tchncs.de, в Keyoxide новый профиль уже добавил.

Планирую деактивировать все аккаунты на своём сервере (трое в лодке, не считая меня) после быстрого опроса юзеров, так как хостить дендрит ваще неприкольно, особенно пока в нём нет simplified sync и пока он жрёт больше синапса.

В те же чаты вряд ли вернусь, я там не особо нужен, и в матрицу редко захожу.

Cool. I just tested #ElementX with a fresh #matrix.org account, and what shall I say: Not a single thing works flawlessly. Not even starting a simple 1:1 chat with another user works without major quirks (initial message is missing and never shows up; Element X doesn't find the DM room and starts a second room when trying to verify the other user).

Good that @element is sunsetting the classic #ElementAndroid 🙄.