Equation 12 · Part 2 · From Origins to Frontier: A History of Quantum and Condensed-Matter Systems
subscript
subscript
What this part means
The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.
Its job in the formula
A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.
Full expression→subscript→Article meaning
The passage around this formula
No part of this history attracts more overclaiming than the search for a superconductor that needs no refrigeration at all. The physical logic for looking at hydrogen-rich compounds under extreme pressure is sound and traces to a real prediction: hydrogen, compressed enough, should behave like a light, strongly-bonded lattice with a very high phonon frequency — precisely the quantity that the BCS formula above says should raise . Superconductivity near 203 kelvin was confirmed in compressed hydrogen sulfide in 2015 and above 250 kelvin in a lanthanum hydride in 2019, both under pressures around 150–200 gigapascals — genuine, independently reproduced results, though far from…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
Sources cited in the article section
- [9] Nature retracts controversial superconductivity paper by embattled physicist ↗
- [10] LK-99 isn't a superconductor — how science sleuths solved the mystery ↗
These citations provide research context; check each source for the exact claim it supports.