Epoch

{title2=1923}
{wiki}

= de Broglie hypothesis
{c}
{synonym}
{title2}


Matter wave

Sex toy

{wiki}

Here is a vendor showcasing their device. They claim in that video that a single photon is produced and detected:

Concrete device described at: <video How to use an SiPM - Experiment Video by SensLTech (2018)>.


Silicon photomultiplier

{c}
{wiki}

= CIA
{c}
{synonym}
{title2}


Central Intelligence Agency

Magazine

Taiwan

{title2=$R_{xy}$}
{title2=$R_H$}

In some contexts, we want to observe what happens for a given fixed <magnetic field> strength on a specific plate (thus $t$ and $n$ are also fixed).

In those cases, it can be useful to talk about the "Hall resistance" defined as:
$$
R_{xy} = \frac{V_y}{I_x}
$$
So note that it is not a "regular resistance", it just has the same dimensions, and is more usefully understood as a proportionality constant for the voltage given an input $I_x$ current:
$$
V_y = R_{xy} I_x
$$

This notion can be useful because everything else being equal, if we increase the current $I_x$, then $V_y$ also increases proportionally, making this a way to talk about the voltage in a current independent manner.

And this is particularly the case for the <quantum Hall effect>, where $R_{xy}$ is constant for wide ranges of applied <magnetic field> and TODO presumably the height $t$ can be made to a single molecular layer with <chemical vapor deposition> of the like, and if therefore fixed.


Hall resistance

Cell wall

{wiki}

How are the bands measured experimentally?

Why are there gaps? Why aren't bands infinite? What determines the width of gaps?

Bibliography:
* <Applications of Quantum Mechanics by David Tong (2017)> Chapter 2 "Band Structure"


Electronic band theory

Refrigerator

{title2=$E=mc^2$}
{wiki=Mass–energy_equivalence}


Mass-energy equivalence

https://100tangpoems.wordpress.com

Good website, with poems in Chinese, <pinyin> and commented translation. Well done!
100 poems website https://100tangpoems.wordpress.com/2023/02/27/pure-and-fair/


Title	Author	Created	Updated
Epoch	Ciro Santilli 32	1970-01-01	1970-01-01
Matter wave	Ciro Santilli 32	1970-01-01	1970-01-01
Sex toy	Ciro Santilli 32	1970-01-01	1970-01-01
Silicon photomultiplier	Ciro Santilli 32	1970-01-01	1970-01-01
Central Intelligence Agency	Ciro Santilli 32	1970-01-01	1970-01-01
Magazine	Ciro Santilli 32	1970-01-01	1970-01-01
Taiwan	Ciro Santilli 32	1970-01-01	1970-01-01
Hall resistance	Ciro Santilli 32	1970-01-01	1970-01-01
Cell wall	Ciro Santilli 32	1970-01-01	1970-01-01
Electronic band theory	Ciro Santilli 32	1970-01-01	1970-01-01
Refrigerator	Ciro Santilli 32	1970-01-01	1970-01-01
Mass-energy equivalence	Ciro Santilli 32	1970-01-01	1970-01-01
100 Tang Poems	Ciro Santilli 32	1970-01-01	1970-01-01
Modular synthesizer	Ciro Santilli 32	1970-01-01	1970-01-01
Space exploration organization	Ciro Santilli 32	1970-01-01	1970-01-01
Quran	Ciro Santilli 32	1970-01-01	1970-01-01
Work by Jean Perrin	Ciro Santilli 32	1970-01-01	1970-01-01
Quadrilateral	Ciro Santilli 32	1970-01-01	1970-01-01
Canada	Ciro Santilli 32	1970-01-01	1970-01-01
Voltmeter	Ciro Santilli 32	1970-01-01	1970-01-01

Ciro Santilli (@cirosantilli, 32)