Hanbury Brown and Twiss Correlation of Cooper Pairs

The Bose-Einstein condensation of constituent particles results in
superfluidity in bosonic systems. Superconductivity in electronic (and
hence fermionic) systems is attributed to the pairing of electrons into so
called \"Cooper pairs\". It is thus quite tempting to regard
superconductivity as a condensation of Cooper pairs. Then, how much of
bosonic nature do Cooper pairs bear? Can one devise an setup to test it
quantitatively in real experiments?

In this talk, I propose a Hanbury Brown and Twiss experiment of Cooper pairs
on the edge channels of topological insulators, a recently discovered new
state of matter.

Surprisingly, our theoretical analysis reveals that the Cooper pairs do not
bear a bosonic nature at all once emitted from the superconductor. Crucial
differences between our work and previous similar works will be discussed.