41554 blogs · [ { "id": "01a087d9-3616-720b-9d99-a07734f00b79", "title": "Thermal fluctuations of a harmonic oscillator", "url": "https://ruvi.blog/posts/optomech/oscillatorthermal/", "published_at": "2025-09-18T00:00:00+00:00" }, { "id": "01a087d9-3616-720b-9d99-a07735514082", "title": "Euler-Lagrange equations for a rigid body with quaternions", "url": "https://ruvi.blog/posts/geomech/quaternionparam/", "published_at": "2025-05-18T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2a341a7e", "title": "A simple formula for powers of two-by-two matrices", "url": "https://ruvi.blog/posts/misc/matrixpower/", "published_at": "2024-04-19T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2b2b9056", "title": "Race restarter math problem", "url": "https://ruvi.blog/posts/misc/racerestarter/", "published_at": "2023-06-06T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2ba26ab9", "title": "Connecting to a Red Pitaya", "url": "https://ruvi.blog/posts/redpitaya/settingup/", "published_at": "2022-06-05T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2c0421f4", "title": "Solving RC circuits with differential operators", "url": "https://ruvi.blog/posts/electronics/rcoperatormethod/", "published_at": "2022-05-30T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2c78973f", "title": "Quadrature parameterisation for second-order bosonic Hamiltonians", "url": "https://ruvi.blog/posts/cvquantum/quadparam/", "published_at": "2021-12-17T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2cffc203", "title": "Geometric interpretation of continuous entropy", "url": "https://ruvi.blog/posts/entropygeometric/entropy02disccts/", "published_at": "2021-06-02T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2d43393d", "title": "Entropy as a 'volume' - the geometric interpretation", "url": "https://ruvi.blog/posts/entropygeometric/entropy01geo/", "published_at": "2021-03-31T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2d5a2048", "title": "Electromagnetic transfer matrix at a boundary", "url": "https://ruvi.blog/posts/electromagnetism/emtransfermatrix/", "published_at": "2020-03-29T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2dc24d1f", "title": "Making friends with electromagnetic boundary conditions", "url": "https://ruvi.blog/posts/electromagnetism/emboundaryconditions/", "published_at": "2020-03-28T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2e97ceb8", "title": "The meaning of Maxwell's equations", "url": "https://ruvi.blog/posts/electromagnetism/maxwellmeaning/", "published_at": "2020-03-27T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2f22684e", "title": "Feynman's vector calculus trick", "url": "https://ruvi.blog/posts/feynmanveccalc/", "published_at": "2019-02-23T00:00:00+00:00" }, { "id": "01a087d9-3617-70d8-9e38-e5cc2f22f98f", "title": "Superdense coding", "url": "https://ruvi.blog/posts/superdensecoding/", "published_at": "2018-05-27T00:00:00+00:00" } ] posts Claim your blog

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2025

Thermal fluctuations of a harmonic oscillator original ↗

18 Sept 2025

Euler-Lagrange equations for a rigid body with quaternions original ↗

18 May 2025

2024

A simple formula for powers of two-by-two matrices original ↗

19 Apr 2024

2023

Race restarter math problem original ↗

6 Jun 2023

2022

Connecting to a Red Pitaya original ↗

5 Jun 2022

Solving RC circuits with differential operators original ↗

30 May 2022

2021

Quadrature parameterisation for second-order bosonic Hamiltonians original ↗

17 Dec 2021

Geometric interpretation of continuous entropy original ↗

2 Jun 2021

Entropy as a 'volume' - the geometric interpretation original ↗

31 Mar 2021

2020

Electromagnetic transfer matrix at a boundary original ↗

29 Mar 2020

Making friends with electromagnetic boundary conditions original ↗

28 Mar 2020

The meaning of Maxwell's equations original ↗

27 Mar 2020

2019

Feynman's vector calculus trick original ↗

23 Feb 2019

2018

Superdense coding original ↗

27 May 2018