1 definition by Omega’s Last
Psi (ψ) | (/(p)saɪ/; uppercase Ψ, lowercase ψ) The 23rd letter of the Greek Alphabet with a numeric value of 700. In both Classical and Modern Greek, the letter indicates the combination /ps/ (as in English word "lapse").
The letter is most commonly used in quantum mechanics for wave functions like the ‘Schrödinger Equation’. May also be used to represent a position of a qubit in a quantum computer.
It is also used in the Polygamma Function where ‘Γ’ (z) is the gamma function.
Other notable appearances of ‘Psi’ include:
- Psychology/Psychiatry/Parapsychology (sometimes).
- Water Potential (Biology - Osmosis).
- Biochemistry: the rare nucleotide ‘Pseudouridine’.
- The gas giant ‘Neptune’ (eighth planet).
- The J/ψ meson, in particle physics.
- ‘Sai’ (weapon), the name of which is pronounced the same way - it also has the general shape of ψ.
- Stream function in fluid mechanics defining the curve to which the flow velocity is always tangent.
(note: some values may need citation)
The letter is most commonly used in quantum mechanics for wave functions like the ‘Schrödinger Equation’. May also be used to represent a position of a qubit in a quantum computer.
It is also used in the Polygamma Function where ‘Γ’ (z) is the gamma function.
Other notable appearances of ‘Psi’ include:
- Psychology/Psychiatry/Parapsychology (sometimes).
- Water Potential (Biology - Osmosis).
- Biochemistry: the rare nucleotide ‘Pseudouridine’.
- The gas giant ‘Neptune’ (eighth planet).
- The J/ψ meson, in particle physics.
- ‘Sai’ (weapon), the name of which is pronounced the same way - it also has the general shape of ψ.
- Stream function in fluid mechanics defining the curve to which the flow velocity is always tangent.
(note: some values may need citation)
“The letter ψ Psi is used to abbreviate Psychology. Don’t mix it up with Water Potential in Biology or ‘Wave-Functions’ for Quantum Mechanics...”
by Omega’s Last December 28, 2019