Interplay between exchange interaction and magnetic field gradient in a double quantum dot with two individual electron spin qubits

2014 ◽  
Vol 90 (7) ◽  
Author(s):  
Romain Thalineau ◽  
Sascha René Valentin ◽  
Andreas D. Wieck ◽  
Christopher Bäuerle ◽  
Tristan Meunier
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Exchange Interaction ◽  
Field Gradient ◽  
Electron Spin ◽  
Magnetic Field Gradient ◽  
Double Quantum ◽  
Spin Qubits ◽  
Double Quantum Dot

Entanglement of two-electron spin states in a double quantum dot

2017 ◽  
Vol 15 (01) ◽  
pp. 1750006 ◽  
Author(s):  
V. G. Bagrov ◽  
D. M. Gitman ◽  
A. D. Levin ◽  
M. S. Meireles
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Electron Spin ◽  
Coherent Control ◽  
Spin Exchange ◽  
Time Dependent ◽  
Double Quantum ◽  
Spin States ◽  
Quantum Bit ◽  
Double Quantum Dot

Recently, an implementation of a universal set of one- and two-quantum-bit gates for quantum computation using spin states of coupled single-electron quantum dots was proposed. It was demonstrated that it is possible to execute a coherent control of a quantum system based on two-electron spin states in a double quantum dot, allowing state preparation, coherent manipulation, and projective readout. This possibility is based on rapid electrical control of the spin exchange interaction. These results motivated us to develop a formal theoretical study of the corresponding model of two coupled spins placed in a magnetic field and subjected to a time-dependent mutual Heisenberg interaction. Using possible exact solutions of the corresponding quantum problem, we study entangling of different separable initial states in this model. It is demonstrated that the entanglement due to a time-dependent Heisenberg interaction is dominating in comparison with the entanglement due to the action of an external magnetic field.

scholarly journals Proposal of a full Bell state analyzer for spin qubits in a double quantum dot

2010 ◽  
Vol 81 (16) ◽  
Author(s):  
Nobuhiko Yokoshi ◽  
Hiroshi Imamura ◽  
Hideo Kosaka
Keyword(s):  
Quantum Dot ◽  
Bell State ◽  
Double Quantum ◽  
Spin Qubits ◽  
Double Quantum Dot

scholarly journals Electron-Spin Manipulation and Resonator Readout in a Double-Quantum-Dot Nanoelectromechanical System

2008 ◽  
Vol 100 (13) ◽  
Author(s):  
N. Lambert ◽  
I. Mahboob ◽  
M. Pioro-Ladrière ◽  
Y. Tokura ◽  
S. Tarucha ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Electron Spin ◽  
Double Quantum ◽  
Spin Manipulation ◽  
Double Quantum Dot ◽  
Nanoelectromechanical System

scholarly journals Shaped electric fields for fast optimal manipulation of electron spin and position in a double quantum dot

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
J. A. Budagosky ◽  
D. V. Khomitsky ◽  
E. Ya. Sherman ◽  
Alberto Castro
Keyword(s):  
Quantum Dot ◽  
Electric Fields ◽  
Electron Spin ◽  
Double Quantum ◽  
Double Quantum Dot
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