(Invited) Toward Si/SiGe Quantum Dot Spin Qubits: Gated Si/SiGe Single and Double Quantum Dots

2019 ◽  
Vol 33 (6) ◽  
pp. 639-647
Author(s):  
Christie Simmons ◽  
J. R. Prance ◽  
Madhu Thalakulam ◽  
B. M. Rosemeyer ◽  
B. J. Van Bael ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Double Quantum ◽  
Spin Qubits ◽  
Double Quantum Dots ◽  
Sige Quantum Dot

scholarly journals Fast high-fidelity entangling gates for spin qubits in Si double quantum dots

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
F. A. Calderon-Vargas ◽  
George S. Barron ◽  
Xiu-Hao Deng ◽  
A. J. Sigillito ◽  
Edwin Barnes ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Double Quantum ◽  
High Fidelity ◽  
Spin Qubits ◽  
Double Quantum Dots

Simple scheme for multiqubit quantum controlled phase-flip gate with singlet-triplet spin qubits in nanowire double quantum dots

Open Physics ◽  
2012 ◽  
Vol 10 (5) ◽  
Author(s):  
Cheng-Zhi Fu ◽  
Ming-Yu Song
Keyword(s):  
Quantum Dots ◽  
Coupling Effect ◽  
Double Quantum ◽  
Spin Qubits ◽  
Simple Scheme ◽  
Alternative Scheme ◽  
Present Scheme ◽  
Double Quantum Dots ◽  
Stripline Resonator ◽  
One Step

AbstractWe propose an alternative scheme for one-step implementing three-qubit controlled phase-flip gate of spin qubits in spatially separated double quantum dots with a superconducting stripline resonator (SSR). Due to the switchable coupling effect between the double quantum dots and SSR, the present scheme could be easily generalized for multi-qubits. The feasibility of the present scheme is characterized by exact numerical simulations that incorporate various sources of experimental noise. Our results show the possibility to realize this proposed scheme within current experimental technologies.

scholarly journals Spin qubits in double quantum dots: Entanglement versus the Kondo effect

2006 ◽  
Vol 74 (24) ◽  
Author(s):  
A. Ramšak ◽  
J. Mravlje ◽  
R. Žitko ◽  
J. Bonča
Keyword(s):  
Quantum Dots ◽  
Kondo Effect ◽  
Double Quantum ◽  
Spin Qubits ◽  
Double Quantum Dots

High-frequency manipulation of few-electron double quantum dots—toward spin qubits

2004 ◽  
Vol 22 (1-3) ◽  
pp. 518-521 ◽  
Author(s):  
T. Kodera ◽  
W.G. van der Wiel ◽  
K. Ono ◽  
S. Sasaki ◽  
T. Fujisawa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Frequency ◽  
Double Quantum ◽  
Spin Qubits ◽  
Double Quantum Dots

Modulation of magnetotransport in asymmetrically coupled double quantum dot system

2016 ◽  
Vol 30 (22) ◽  
pp. 1650266 ◽  
Author(s):  
Yan-Hua Liao ◽  
Jin Huang ◽  
Wei-Zhong Wang
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Dots ◽  
Energy Level ◽  
Quantum Dot ◽  
Spin Polarization ◽  
Quantum Phase Transition ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Double Quantum Dots

We study the transport properties in double quantum dots asymmetrically coupled to leads in magnetic field. We focus on the situation in which the second dot (QD2) couples with the leads with a weak hybridization function. The results shows that by tuning the energy level [Formula: see text] of QD2 one can control the conductance and its spin polarization of the system. In the absence of magnetic field [Formula: see text], with increasing [Formula: see text], the conductance shows a dip structure. This behavior of conductance results from a continuous triplet–doublet quantum phase transition. In the presence of magnetic field [Formula: see text], we obtain a perfect spin filtering with a fully-polarized conductance of up-spin or down-spin.

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