Dark Energy Beyond Scalars, Part I: Why p-Forms?
2025-12-19
Why consider vector and 2-form fields as dark energy instead of the usual scalar, and what these fields are.
2047 words
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10 minutes
Bose-Einstein Condensation (1): Can it occur in 1D and 2D?
2024-05-24
Can free bosons in 1D or 2D form a Bose-Einstein condensate? No, and the density of states shows why.
600 words
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3 minutes
IPSP Leipzig, Part 3: Do's and Don'ts for the Course
2024-05-03
Do's and don'ts once you are in IPSP Leipzig: the weekly assignments, TP1, not letting one failed course snowball, part-time jobs and mental health.
2254 words
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11 minutes
Classical Mechanics – Best References for Physics Students
2024-04-07
Textbooks and resources I recommend for learning classical mechanics.
973 words
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5 minutes
Mandelstam Variables in the CM Frame
2024-04-03
The Mandelstam variables s, t, u for e+e- → μ+μ- in the center-of-mass frame, and the cross section rewritten in terms of them.
1251 words
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6 minutes
Virial Expansion for Hard Spheres
2024-04-03
The virial expansion for a classical gas of hard spheres, from the Mayer f-function to the excluded volume and the higher-order coefficients.
1241 words
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6 minutes
Cosmology – Best References for Physics Students
2023-12-01
Textbooks, lectures and notes I recommend for learning cosmology.
613 words
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3 minutes
Ph.D. Physics Applications 101 (Canada and Germany)
2023-07-21
Applying for Physics Ph.D. programs in Canada and Germany: where to look for positions, how to contact supervisors and what goes into the application.
914 words
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5 minutes