HQOC Special Seminar
Thursday, March 6 from 3-4 PM
Jefferson 356
Refreshments served at 2:50 PM
Prof. Adam Gali, Hungarian Academy of Sciences, Budapest University of Technology and
Economics
"Quantum Mechanical Simulations of Solid State Quantum Bits"
Nitrogen-vacancy center in diamond has become a leading quantum measurement solid state
device. Understanding the intricate details of its electronic structure, magnetic and
optical properties, the process of non-radiative decay from the excited state as a
function of external perturbation or temperature is inevitable in order to optimize its
operation. Particularly, we show that advanced density functional theory is able to
address this issue. Our recent developments on calculating the electron spin - electron
spin dipole-dipole interaction can provide insight about the effect of perturbations on
NV-center. The measurement of these external perturbations may be utilized for sensing
quantum objects such as single electron or nuclear spins. However, many materials science
problems have to be solved in practice. Our calculations indicate that the formation of NV
defect in electron irradiated or N-implanted diamond samples occurs in the early stage,
and optically active, high-spin divacancy defects form in this process. We also show that
there is a critical distance between the position of NV defect and the surface of diamond
to preserve their favorable properties found in bulk diamond, and we identify such
combination of terminators at (001) surface of diamond which would be ideal for sensing
applications.
Joan Hamilton
Faculty Assistant to Profs. Greiner and Lukin
HQOC Laboratory Administrator
HUCTW Local Union Representative
Harvard University
Department of Physics
17 Oxford Street
Cambridge, MA 02138
P: (617) 496-2544
F: (617) 496-2545
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HQOC Special Seminar
Thursday, March 6 from 3-4 PM
Jefferson 356
Refreshments served at 2:50 PM
Prof. Adam Gali, Hungarian Academy of Sciences, Budapest University of Technology and
Economics
"Quantum Mechanical Simulations of Solid State Quantum Bits"
Nitrogen-vacancy center in diamond has become a leading quantum measurement solid state
device. Understanding the intricate details of its electronic structure, magnetic and
optical properties, the process of non-radiative decay from the excited state as a
function of external perturbation or temperature is inevitable in order to optimize its
operation. Particularly, we show that advanced density functional theory is able to
address this issue. Our recent developments on calculating the electron spin - electron
spin dipole-dipole interaction can provide insight about the effect of perturbations on
NV-center. The measurement of these external perturbations may be utilized for sensing
quantum objects such as single electron or nuclear spins. However, many materials science
problems have to be solved in practice. Our calculations indicate that the formation of NV
defect in electron irradiated or N-implanted diamond samples occurs in the early stage,
and optically active, high-spin divacancy defects form in this process. We also show that
there is a critical distance between the position of NV defect and the surface of diamond
to preserve their favorable properties found in bulk diamond, and we identify such
combination of terminators at (001) surface of diamond which would be ideal for sensing
applications.
Joan Hamilton
Faculty Assistant to Profs. Greiner and Lukin
HQOC Laboratory Administrator
HUCTW Local Union Representative
Harvard University
Department of Physics
17 Oxford Street
Cambridge, MA 02138
P: (617) 496-2544
F: (617) 496-2545