TY - JOUR
T1 - Automated Reconstruction of Bound States in Bilayer Graphene Quantum Dots
AU - Bucko, Jozef
AU - Schäfer, Frank
AU - Herman, František
AU - Garreis, Rebekka
AU - Tong, Chuyao
AU - Kurzmann, Annika
AU - Ihn, Thomas
AU - Greplova, Eliska
PY - 2023
Y1 - 2023
N2 - Bilayer graphene is a nanomaterial that allows for well-defined, separated quantum states to be defined by electrostatic gating and, therefore, provides an attractive platform to construct tunable quantum dots. When a magnetic field perpendicular to the graphene layers is applied, the graphene valley degeneracy is lifted, and splitting of the energy levels of the dot is observed. Although bilayer graphene quantum dots have recently been realized in experiments, it is critically important to devise robust methods that can identify the observed quantum states from accessible measurement data. Here, we develop an efficient algorithm for extracting the model parameters needed to characterize the states of a bilayer graphene quantum dot. Specifically, we put forward a Hamiltonian-guided random search method and demonstrate robust identification of quantum states on both simulated and experimental data.
AB - Bilayer graphene is a nanomaterial that allows for well-defined, separated quantum states to be defined by electrostatic gating and, therefore, provides an attractive platform to construct tunable quantum dots. When a magnetic field perpendicular to the graphene layers is applied, the graphene valley degeneracy is lifted, and splitting of the energy levels of the dot is observed. Although bilayer graphene quantum dots have recently been realized in experiments, it is critically important to devise robust methods that can identify the observed quantum states from accessible measurement data. Here, we develop an efficient algorithm for extracting the model parameters needed to characterize the states of a bilayer graphene quantum dot. Specifically, we put forward a Hamiltonian-guided random search method and demonstrate robust identification of quantum states on both simulated and experimental data.
UR - http://www.scopus.com/inward/record.url?scp=85148331265&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.19.024015
DO - 10.1103/PhysRevApplied.19.024015
M3 - Article
AN - SCOPUS:85148331265
SN - 2331-7019
VL - 19
JO - Physical Review Applied
JF - Physical Review Applied
IS - 2
M1 - 024015
ER -