Controllable interdot coupling in a Si-based double quantum dot system for a qubit gate

2014 ◽  
Vol 64 (11) ◽  
pp. 1626-1629
Author(s):  
J. J. Lee ◽  
J. S. Kim ◽  
S. J. Shin ◽  
J. B. Choi ◽  
D. G. Hasko
Keyword(s):  
Quantum Dot ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Interdot Coupling ◽  
Qubit Gate

scholarly journals Two-Qubit Gate of Combined Single-Spin Rotation and Interdot Spin Exchange in a Double Quantum Dot

2011 ◽  
Vol 107 (14) ◽  
Author(s):  
R. Brunner ◽  
Y.-S. Shin ◽  
T. Obata ◽  
M. Pioro-Ladrière ◽  
T. Kubo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Exchange ◽  
Spin Rotation ◽  
Double Quantum ◽  
Single Spin ◽  
Double Quantum Dot ◽  
Qubit Gate

scholarly journals Non-Ideal X-Gate and Z-Gate in Semiconducting Spin Qubit Implementations

Proceedings ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 53
Author(s):  
Elena Ferraro ◽  
Marco Fanciulli ◽  
Marco De Michielis
Keyword(s):  
Quantum Dot ◽  
Quantum Computation ◽  
Double Quantum ◽  
Time Interval ◽  
Effective Hamiltonian ◽  
Single Qubit ◽  
Hamiltonian Models ◽  
Double Quantum Dot ◽  
Spin Qubit ◽  
Qubit Gate

Several spin qubit architectures have been proposed, theoretically investigated and realized at least on the scale of single devices in view of quantum computation and simulation applications. We focus our study on five qubit types: quantum dot spin qubit, double quantum dot singlet-triplet qubit, double quantum dot hybrid qubit, donor qubit, quantum dot spin-donor qubit and for each one we derived a compact effective Hamiltonian. Single qubit gate fidelities when time interval error is included are compared. A realistic set of values for the error parameters of amplitude controls linked to the z and x contribution appearing in the Hamiltonian models has been used. This study provides a ranking of the gate fidelities for the different qubit architectures highlighting which one is the most robust with respect to the considered control noises.

Conductance through a parallel-coupled double quantum dot with a side-coupled quantum dot system

2017 ◽  
Vol 31 (09) ◽  
pp. 1750095 ◽  
Author(s):  
Zelong He ◽  
Jiyuan Bai ◽  
Cheng Ma
Keyword(s):  
Quantum Dot ◽  
Coupling Strength ◽  
Fano Resonance ◽  
Numerical Results ◽  
Function Technique ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Couple Quantum ◽  
Interdot Coupling ◽  
Non Equilibrium Green’S Function

Using the non-equilibrium Green’s function technique, conductance through a parallel-coupled double quantum dot (PCDQD) with a side-coupled quantum dot system is investigated. The evolution of the conductance strongly depends on the coupling between the side-coupled quantum dot and PCDQD. Moreover, the conductance as a function of the level of side-couple quantum dot is investigated. Numerical results indicate the lineshape of Fano resonance can be modulated by adjusting the interdot coupling strength.

scholarly journals Large Voltage-Tunable Spin Valve Based on a Double Quantum Dot

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Patrycja Tulewicz ◽  
Kacper Wrześniewski ◽  
Szabolcs Csonka ◽  
Ireneusz Weymann
Keyword(s):  
Quantum Dot ◽  
Spin Valve ◽  
Double Quantum ◽  
Double Quantum Dot

Fano Effect in T-Shaped Double Quantum Dot Structure with Decoherence Effect

2008 ◽  
Vol 49 (3) ◽  
pp. 771-776 ◽  
Author(s):  
Gao Wen-Zhu ◽  
Gong Wei-Jiang ◽  
Zheng Yi-Song ◽  
Liu Yu ◽  
Lü Tian-Quan
Keyword(s):  
Quantum Dot ◽  
Double Quantum ◽  
Fano Effect ◽  
Double Quantum Dot ◽  
Decoherence Effect

Electron transport in T-shaped double quantum dot structure

2021 ◽  
Vol 53 (8) ◽  
Author(s):  
Mohammed A. A. Abbas ◽  
Lafy F. Al-Badry ◽  
Amin H. Al-Khursan
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Double Quantum ◽  
Double Quantum Dot

Double quantum dot-like transport in controllably doped graphene nanoribbon

2021 ◽  
Vol 118 (8) ◽  
pp. 083105
Author(s):  
Zhongwang Wang ◽  
Yahua Yuan ◽  
Xiaochi Liu ◽  
Manoharan Muruganathan ◽  
Hiroshi Mizuta ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Graphene Nanoribbon ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Doped Graphene

Geometric phase of an open double-quantum-dot system detected by a quantum point contact

2020 ◽  
Vol 29 (3) ◽  
pp. 030302
Author(s):  
Qian Du ◽  
Kang Lan ◽  
Yan-Hui Zhang ◽  
Lu-Jing Jiang
Keyword(s):  
Quantum Dot ◽  
Geometric Phase ◽  
Point Contact ◽  
Quantum Point Contact ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Quantum Point
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