Quantum Dot Circuits for Quantum Computation

2005 ◽  
pp. 338-352
Author(s):  
R. H. Blick ◽  
A. K. Hüttel ◽  
A. W. Holleitner ◽  
L. Pescini ◽  
H. Lorenz
Keyword(s):  
Quantum Dot ◽  
Quantum Computation

Universal quantum computation with quantum-dot cellular automata in decoherence-free subspace

2008 ◽  
Vol 8 (10) ◽  
pp. 977-985
Author(s):  
Z.-Y. Xu ◽  
M. Feng ◽  
W.-M. Zhang
Keyword(s):  
Cellular Automata ◽  
Quantum Dot ◽  
Quantum Computation ◽  
Two Dimensions ◽  
High Fidelity ◽  
Electron Pairs ◽  
Quantum Dot Cellular Automata ◽  
Single Spin ◽  
Universal Quantum ◽  
Decoherence Free Subspace

We investigate the possibility to have electron-pairs in decoherence-free subspace (DFS), by means of the quantum-dot cellular automata (QCA) and single-spin rotations, to deterministically carry out a universal quantum computation with high-fidelity. We show that our QCA device with electrons tunneling in two dimensions is very suitable for DFS encoding, and argue that our design favors a scalable quantum computation robust to collective dephasing errors.

scholarly journals High-Sensitivity Charge Detection with a Single-Lead Quantum Dot for Scalable Quantum Computation

2016 ◽  
Vol 6 (4) ◽  
Author(s):  
M. G. House ◽  
I. Bartlett ◽  
P. Pakkiam ◽  
M. Koch ◽  
E. Peretz ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Quantum Computation ◽  
High Sensitivity ◽  
Charge Detection

scholarly journals Overview of spin-based quantum dot quantum computation

2003 ◽  
Vol 238 (2) ◽  
pp. 360-365 ◽  
Author(s):  
Xuedong Hu ◽  
S. Das Sarma
Keyword(s):  
Quantum Dot ◽  
Quantum Computation

QUANTUM COMPUTATION BASED ON ELECTRON SPIN QUBITS WITHOUT SPIN-SPIN INTERACTION

2005 ◽  
Vol 03 (supp01) ◽  
pp. 155-162
Author(s):  
YIN-ZHONG WU ◽  
WEI-MIN ZHANG ◽  
CHOPIN SOO
Keyword(s):  
Cellular Automata ◽  
Quantum Dot ◽  
Quantum Computation ◽  
Electron Spin ◽  
Electron Tunneling ◽  
Entangled State ◽  
Spin Interaction ◽  
Quantum Dot Cellular Automata ◽  
Universal Quantum ◽  
Coherent Quantum

Using electron spin states in a unit cell of three semiconductor quantum dots as qubit states, a scalable quantum computation scheme is advocated without invoking qubit-qubit interactions. Single electron tunneling technology and coherent quantum-dot cellular automata architecture are used to generate an ancillary charge entangled state which is then converted into spin entangled state. Without using charge measurement and ancillary qubits, we demonstrate universal quantum computation based on free electron spin and coherent quantum-dot cellular automata.

Quantum computation with quantum dot excitons

2004 ◽  
Vol 19 (4) ◽  
pp. S392-S396 ◽  
Author(s):  
H Kamada ◽  
H Gotoh
Keyword(s):  
Quantum Dot ◽  
Quantum Computation

Investigation of silicon isolated double quantum-dot energy levels for quantum computation

2006 ◽  
Vol 83 (4-9) ◽  
pp. 1818-1822 ◽  
Author(s):  
Michael G. Tanner ◽  
David G. Hasko ◽  
David A. Williams
Keyword(s):  
Quantum Dot ◽  
Quantum Computation ◽  
Energy Levels ◽  
Double Quantum ◽  
Double Quantum Dot

scholarly journals Quantum computation with quantum-dot spin qubits inside a cavity

2009 ◽  
Vol 373 (17) ◽  
pp. 1527-1530 ◽  
Author(s):  
Ping Dong ◽  
Zhuo-Liang Cao
Keyword(s):  
Quantum Dot ◽  
Quantum Computation ◽  
Spin Qubits

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.

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