scholarly journals Electrical control of a spin qubit in InSb nanowire quantum dots: Strongly suppressed spin relaxation in high magnetic field

2020 ◽  
Vol 101 (15) ◽  
Author(s):  
Suzana Miladić ◽  
Pavle Stipsić ◽  
Edib Dobardžić ◽  
Marko Milivojević
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Spin Relaxation ◽  
High Magnetic Field ◽  
Electrical Control ◽  
Spin Qubit

scholarly journals Design and commissioning of a high magnetic field muon spin relaxation spectrometer at the ISIS pulsed neutron and muon source

2011 ◽  
Vol 82 (7) ◽  
pp. 073904 ◽  
Author(s):  
J. S. Lord ◽  
I. McKenzie ◽  
P. J. Baker ◽  
S. J. Blundell ◽  
S. P. Cottrell ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Relaxation ◽  
High Magnetic Field ◽  
Muon Spin ◽  
Muon Spin Relaxation ◽  
Pulsed Neutron

High magnetic field investigations of quantum dots

1994 ◽  
Vol 15 (1) ◽  
pp. 37 ◽  
Author(s):  
D.A. Wharam ◽  
T. Heinzel ◽  
S. Manus ◽  
J.P. Kotthaus ◽  
G. Böhm ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
High Magnetic Field ◽  
Field Investigations

Landau level formation in semiconductor quantum dots in a high magnetic field

1997 ◽  
Vol 71 (16) ◽  
pp. 2316-2318 ◽  
Author(s):  
S. Nomura ◽  
L. Samuelson ◽  
M.-E. Pistol ◽  
K. Uchida ◽  
N. Miura ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Landau Level ◽  
High Magnetic Field ◽  
Semiconductor Quantum Dots

Photoluminescence excitation spectroscopy of InAs/GaAs quantum dots in high magnetic field

2004 ◽  
Vol 22 (1-3) ◽  
pp. 603-606 ◽  
Author(s):  
Adam Babinski ◽  
S. Awirothananon ◽  
S. Raymond ◽  
S. Studenikin ◽  
P. Hawrylak ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
High Magnetic Field ◽  
Photoluminescence Excitation

EFFECT OF Mn IONS ON SPIN RELAXATION AND LIFE-TIME OF e-h COMPLEXES IN CdSe/ZnSe/ZnMnSe QUANTUM DOTS

2009 ◽  
Vol 23 (12n13) ◽  
pp. 2984-2988
Author(s):  
A. V. CHERNENKO ◽  
A. S. BRICHKIN ◽  
V. D. KULAKOVSKII ◽  
N. A. SOBOLEV ◽  
S. V. IVANOV
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Exchange Interaction ◽  
Spin Relaxation ◽  
Qualitative Difference ◽  
Life Time ◽  
Znse Layer ◽  
Growth Plane

Photoluminescence measurements on individual CdSe / ZnSe / ZnMnSe quantum dots in a magnetic field up to 11 T both parallel and perpendicular to the sample growth plane at 1.6 K reveal a qualitative difference between samples with different strength of the sp-d exchange interaction controlled by means of varying the thickness of the nonmagnetic ZnSe layer. The observed difference is related with the dependence of the non-radiative Mn assisted recombination and the spin relaxation on magnetic field and the strength of the exchange interaction.

scholarly journals Spin manipulation and decoherence in a quantum dot mediated by a synthetic spin-orbit coupling of broken $T$-symmetry

2021 ◽  
Author(s):  
Peihao Huang ◽  
Xuedong Hu
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Spin Relaxation ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Field Orientation ◽  
Spin Manipulation ◽  
Pure Dephasing ◽  
Spin Qubit

Abstract The electrical control of a spin qubit in a quantum dot relies on spin-orbit coupling (SOC), which could be either intrinsic to the underlying crystal lattice or heterostructure, or extrinsic via, for example, a micro-magnet. In experiments, micromagnets have been used as a synthetic SOC to enable strong coupling of a spin qubit in quantum dots with electric fields. Here we study theoretically the spin relaxation, pure dephasing, spin manipulation, and spin-photon coupling of an electron in a quantum dot due to the synthetic SOC induced spin-orbit mixing. We find qualitative difference in the spin dynamics in the presence of a synthetic SOC compared with the case of the intrinsic SOC. Specifically, spin relaxation due to the synthetic SOC and deformation potential phonon emission (or Johnson noise) shows $B_0^5$ (or $B_0$) dependence with the magnetic field, which is in contrast with the $B_0^7$ (or $B_0^3$) dependence in the case of the intrinsic SOC. Moreover, charge noise induces fast spin dephasing to the first order of the synthetic SOC, which is in sharp contrast with the negligible spin pure dephasing in the case of the intrinsic SOC. These qualitative differences are attributed to the broken time-reversal symmetry ($T$-symmetry) of the synthetic SOC. An SOC with broken $T$-symmetry (such as the synthetic SOC from a micro-magnet) eliminates the ``Van Vleck cancellation'' and causes a finite longitudinal spin-electric coupling that allows the longitudinal coupling between spin and electric field, and in turn allows spin pure dephasing. Finally, through proper choice of magnetic field orientation, the electric-dipole spin resonance via the synthetic SOC can be improved with potential applications in spin-based quantum computing.

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