Long-lived quantum memory with nuclear atomic spins.
We propose to store nonclassical states of light into the macroscopic collective nuclear spin (10(18) atoms) of a 3He vapor, using metastability exchange collisions. These collisions, commonly used to transfer orientation from the metastable state 2 3S1 to the ground state of 3He, can also transfer quantum correlations. This gives a possible experimental scheme to map a squeezed vacuum field state onto a nuclear spin state with very long storage times (hours).
Dantan
A
A
LKB, UPMC, case 74, place Jussieu, 75252 Paris Cedex 05, France.
Reinaudi
G
G
Sinatra
A
A
Laloë
F
F
Giacobino
E
E
Pinard
M
M