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r/quantummechanics↗

Quantum Mechanics

This is a subreddit devoted to discussions about quantum mechanics and experiments regarding quantum mechanics. Please Obey the reddit TOS, including provisions regarding harassment and spam, including non-monetary spam. Content should either involve math, or a discussion of a known theory with a mathematical basis. For example, a theory should either follow a Lorentz-invariant framework or be understood as a limiting case of a Lorentz-invariant system, like the Schrödinger equation.

16k subscribers6 posts / mo in Sep 20266 authors / mosince 2010

r/quantummechanics has 16k members (+36% over the last 12 months). It gets about 6 posts a month from 6 people. Top topics: Big Bang Theory, Consciousness and Existence and Quantum Computing Advances.

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Size and growth

How r/quantummechanics has grown

r/quantummechanics

Subscriber growth

Subscribers over time

+36%in 12 months · +4.0% in 3 months · +2.5% in 1 month
Sep 202616k
Growing16k subscribers
Data since Mar 2018Live · through Sep 2026
r/quantummechanics

Monthly activity

Posts, comments and authors per month

−73%vs Sep 2025 · −55% last 3 months vs the 3 before
Sep 20266
QuieterPeaked at 30 in Jan 2026
Data through Sep 2026 · October usually lands mid-November

What people talk about

Topics and brands on r/quantummechanics

Top topics

Share of the subreddit's posts

  1. Big Bang Theory0.5%
  2. Consciousness and Existence0.4%
  3. Quantum Computing Advances0.4%

Brands people mention

Most-mentioned brands and sites, last 12 months

  1. Doi
  2. Zenodo
  3. Substack
  4. arXiv.org e-Print archive

The full report

Everything else about r/quantummechanics

Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.

Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research