The electron-nuclei (hyperfine) interaction is central to spin qubits in
solid state systems. It can be a severe decoherence source but also allows
dynamic access to the nuclear spin states. We study a double quantum dot
exposed to an on-chip single-domain nanomagnet and show that its inhomogeneous
magnetic field crucially modifies the complex nuclear spin dynamics such that
the Overhauser field tends to compensate external magnetic fields. This turns
out to be beneficial for polarizing the nuclear spin ensemble. We reach a
nuclear spin polarization of ~50%, unrivaled in lateral dots, and explain our
manipulation technique using a comprehensive rate equation model.
Description
Large nuclear spin polarization in gate-defined quantum dots using a
single-domain nanomagnet
%0 Generic
%1 petersen2012large
%A Petersen, Gunnar
%A Hoffmann, Eric A.
%A Schuh, Dieter
%A Wegscheider, Werner
%A Giedke, Geza
%A Ludwig, Stefan
%D 2012
%K myown
%T Large nuclear spin polarization in gate-defined quantum dots using a
single-domain nanomagnet
%U http://arxiv.org/abs/1212.3140
%X The electron-nuclei (hyperfine) interaction is central to spin qubits in
solid state systems. It can be a severe decoherence source but also allows
dynamic access to the nuclear spin states. We study a double quantum dot
exposed to an on-chip single-domain nanomagnet and show that its inhomogeneous
magnetic field crucially modifies the complex nuclear spin dynamics such that
the Overhauser field tends to compensate external magnetic fields. This turns
out to be beneficial for polarizing the nuclear spin ensemble. We reach a
nuclear spin polarization of ~50%, unrivaled in lateral dots, and explain our
manipulation technique using a comprehensive rate equation model.
@misc{petersen2012large,
abstract = {The electron-nuclei (hyperfine) interaction is central to spin qubits in
solid state systems. It can be a severe decoherence source but also allows
dynamic access to the nuclear spin states. We study a double quantum dot
exposed to an on-chip single-domain nanomagnet and show that its inhomogeneous
magnetic field crucially modifies the complex nuclear spin dynamics such that
the Overhauser field tends to compensate external magnetic fields. This turns
out to be beneficial for polarizing the nuclear spin ensemble. We reach a
nuclear spin polarization of ~50%, unrivaled in lateral dots, and explain our
manipulation technique using a comprehensive rate equation model.},
added-at = {2012-12-14T18:48:05.000+0100},
author = {Petersen, Gunnar and Hoffmann, Eric A. and Schuh, Dieter and Wegscheider, Werner and Giedke, Geza and Ludwig, Stefan},
biburl = {https://www.bibsonomy.org/bibtex/2362cc316db3be67fd2f6fb23200cf748/ggiedke},
description = {Large nuclear spin polarization in gate-defined quantum dots using a
single-domain nanomagnet},
interhash = {1efbcba4cd95f53b7a6b50e89105b407},
intrahash = {362cc316db3be67fd2f6fb23200cf748},
keywords = {myown},
note = {cite arxiv:1212.3140},
timestamp = {2012-12-14T18:48:05.000+0100},
title = {Large nuclear spin polarization in gate-defined quantum dots using a
single-domain nanomagnet},
url = {http://arxiv.org/abs/1212.3140},
year = 2012
}