# Latex2wp Example.html

This is the how the ‘example.tex’ would look like on wordpress, when you have converted the ‘example.tex’ file provided with Latex to WordPress to html using the program.

Look at the document source to see how to strike out text, how to use different colors, and how to link to URLs with snapshot preview and how to link to URLs without snapshot preview.

There is a command which is ignored by pdflatex and which defines where to cut the post in the version displayed on the main page (more…)

# The Kiss Notation

I am attending a course in Quantum Information Processing. As with Quantum Mechanics, Quantum Information Processing uses the Dirac’s notation (Defined Below).

Dirac’s Noation:

1. $|\psi\rangle$ represents a column vector – is called ‘ket psi’.
2. $\langle\psi|$ represents the conjugate transpose of $|\psi\rangle$ – is called ‘bra psi’.

In quantum computation one often comes across the following notation

$|\psi\rangle\langle\phi|$

Instead of pronouncing the above notation as ‘bra psi ket phi'(which is rather lenghty to pronouce) – we would say it as ‘psi kiss phi’.

The speciality of the kiss notation is that if you take a dagger of the kiss notation, i.e. $(|\psi\rangle\langle\phi|)^\dagger$, it still remains kiss, with the psi and phi chaging there position. (Re-enforcing our idea of that fact that love cannot be killed :-D)

$(|\psi\rangle\langle\phi|)^\dagger$ = $|\phi\rangle\langle\psi|$

The new LATEX commands for the above formulation are:

1. \newcommand*{\kiss}[2]{|#1 \rangle\langle #2|}
2. \newcommand*{\kisso[1]{|#1 \rangle\langle #1|}

The above commands can be updated in the LATEX Preamble of LYX or can be written in the begining of the TEX document and can be used in the document.

Usage of the above commands are as follows:

1. \kiss{i}{u} will have the following ouput – $|i\rangle\langle u|$
2. \kisso{i} will have the following output – $|i\rangle\langle i|$