TY - JOUR
T1 - Controllable Single Cooper Pair Splitting in Hybrid Quantum Dot Systems
AU - de Jong, Damaz
AU - Prosko, Christian G.
AU - Han, Lin
AU - Malinowski, Filip K.
AU - Liu, Yu
AU - Kouwenhoven, Leo P.
AU - Pfaff, Wolfgang
PY - 2023
Y1 - 2023
N2 - Cooper pair splitters hold utility as a platform for investigating the entanglement of electrons in Cooper pairs, but probing splitters with voltage-biased Ohmic contacts prevents the retention of electrons from split pairs since they can escape to the drain reservoirs. We report the ability to controllably split and retain single Cooper pairs in a multi-quantum-dot device isolated from lead reservoirs, and separately demonstrate a technique for detecting the electrons emerging from a split pair. First, we identify a coherent Cooper pair splitting charge transition using dispersive gate sensing at GHz frequencies. Second, we utilize a double quantum dot as an electron parity sensor to detect parity changes resulting from electrons emerging from a superconducting island.
AB - Cooper pair splitters hold utility as a platform for investigating the entanglement of electrons in Cooper pairs, but probing splitters with voltage-biased Ohmic contacts prevents the retention of electrons from split pairs since they can escape to the drain reservoirs. We report the ability to controllably split and retain single Cooper pairs in a multi-quantum-dot device isolated from lead reservoirs, and separately demonstrate a technique for detecting the electrons emerging from a split pair. First, we identify a coherent Cooper pair splitting charge transition using dispersive gate sensing at GHz frequencies. Second, we utilize a double quantum dot as an electron parity sensor to detect parity changes resulting from electrons emerging from a superconducting island.
UR - http://www.scopus.com/inward/record.url?scp=85175272074&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.131.157001
DO - 10.1103/PhysRevLett.131.157001
M3 - Article
C2 - 37897758
AN - SCOPUS:85175272074
SN - 0031-9007
VL - 131
JO - Physical review letters
JF - Physical review letters
IS - 15
M1 - 157001
ER -