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TIME IS DISCONNECTED FROM ENTROPY. “Fortunately the answer to this question is simple. Entropy belongs to the realm of equilibrium statistical physics, within which time-reversal invariance plays no role.” https://lnkd.in/dqXS2nnQ View in LinkedIn

FRAGMENT FROM NATURE continues from last weekend and concludes this weekend on a charming paper concerned with the physics of symmetry. That said, no physicist does more than describe symmetry, unable to explain why it exists. This is true for many physical phenomena, including energy. We describe it by the work that it does but are at a loss to say what it really is. https://lnkd.in/dqXS2nnQ View in LinkedIn

TIME AND ENTROPY. “If time-reversal invariance is violated, is it necessary to re-evaluate the traditional concepts of statistical physics, in particular the concept of entropy?” https://lnkd.in/dqXS2nnQ View in LinkedIn

VALIDATION NOT IN SIGHT. “However, an explicit proof of the violation of T invariance in the weak interactions would still be desirable. It is possible to think of such experiments, but unfortunately none seems feasible in the near future.” https://lnkd.in/dqXS2nnQ View in LinkedIn

PREDICTION. “With the violation of CP invariance, it is generally believed on the grounds of the CPT theorem that T invariance is also violated.” https://lnkd.in/dqXS2nnQ View in LinkedIn

The beautiful slugs have come out of their long summer hiding in the damp weather. View in LinkedIn

REFLECTIONS. “Yet away I turn myself to the holy, ineffable, mysterious Night. Afar lies the world sunk in a deep vault below; desert and solitary is its place. Deep sadness breathes through the chords of the breast. In drops of dew will I sink down and mingle with the dust. The depths of memory, the wishes of youth, the dreams of childhood, the short joys and vain hopes of the whole span of life, come forth in gray robes, like the evening mist after the setting of the sun.” (Novalis, 1772-1801). https://lnkd.in/dNhZS24Q View in LinkedIn

ANTIMATTER FUEL. “An exciting prospect is the use of antimatter as a fuel source due to its ability to convert mass energy to kinetic energy. Upon annihilation of antimatter with matter, tremendous amounts of energy are carried away by charged and neutral particles.” https://lnkd.in/dtWtzEsU View in LinkedIn

ALTERNATIVE. “A direct measurement of the gravitational acceleration of antimatter has the potential to show that we live in a “Dirac-Milne” Universe, which could explain cosmological observations without the need for dark matter, dark energy, inflation, or missing antimatter. Such a measurement would also be sensitive to the possible existence of a fifth force.” https://lnkd.in/df5VU2Ug View in LinkedIn

Door to the Girona cathedral garden. View in LinkedIn