A theoretical proposal shows that coupling a cold-atom junction to a molecular BEC creates Cooper-pair-assisted transport peaks at bias values Δμ = |U|/(2k+1), enabling cold-atom studies of Andreev-reflection physics.
Quantized conductance through a spin-selective atomic point contact
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We implement a microscopic spin filter for cold fermionic atoms in a quantum point contact (QPC) and create fully spin-polarized currents while retaining conductance quantization. Key to our scheme is a near-resonant optical tweezer inducing a large effective Zeeman shift inside the QPC while its local character limits dissipation. We observe a renormalization of this shift due to interactions of a few atoms in the QPC. Our work represents the analog of an actual spintronic device and paves the way to studying the interplay between spin-splitting and interactions far from equilibrium.
fields
quant-ph 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
Reservoir engineering of Cooper-pair-assisted transport with cold atoms
A theoretical proposal shows that coupling a cold-atom junction to a molecular BEC creates Cooper-pair-assisted transport peaks at bias values Δμ = |U|/(2k+1), enabling cold-atom studies of Andreev-reflection physics.