Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Fast Hybrid Silicon Double-Quantum-Dot Qubit
AU - Shi, Zhan
AU - Simmons, C. B.
AU - Prance, J. R.
AU - Gamble, John King
AU - Koh, Teck Seng
AU - Shim, Yun-Pil
AU - Hu, Xuedong
AU - Savage, D. E.
AU - Lagally, M. G.
AU - Eriksson, M. A.
AU - Friesen, Mark
AU - Coppersmith, S. N.
PY - 2012/4/4
Y1 - 2012/4/4
N2 - We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot and two electrons in the other. The qubit itself is a set of two states with total spin quantum numbers S-2 = 3/4 (S = 1/2) and S-z = -1/2, with the two different states being singlet and triplet in the doubly occupied dot. Gate operations can be implemented electrically and the qubit is highly tunable, enabling fast implementation of one-and two-qubit gates in a simpler geometry and with fewer operations than in other proposed quantum dot qubit architectures with fast operations. Moreover, the system has potentially long decoherence times. These are all extremely attractive properties for use in quantum information processing devices.
AB - We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot and two electrons in the other. The qubit itself is a set of two states with total spin quantum numbers S-2 = 3/4 (S = 1/2) and S-z = -1/2, with the two different states being singlet and triplet in the doubly occupied dot. Gate operations can be implemented electrically and the qubit is highly tunable, enabling fast implementation of one-and two-qubit gates in a simpler geometry and with fewer operations than in other proposed quantum dot qubit architectures with fast operations. Moreover, the system has potentially long decoherence times. These are all extremely attractive properties for use in quantum information processing devices.
UR - http://www.scopus.com/inward/record.url?scp=84859581045&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.108.140503
DO - 10.1103/PhysRevLett.108.140503
M3 - Journal article
VL - 108
SP - -
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 14
M1 - 140503
ER -