Magnetometry Ben Gurion University Atom Chip Group Quantum systems their hallmarks and technological applications Why cant Quantum mechanics be observed in solid states The nitrogenvacancy center in diamonds a unique roomtemperature quantum system ID: 604188
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Slide1
Nitrogen-Vacancy Center in Diamonds Physics and Magnetometry
Ben
Gurion
University
Atom Chip GroupSlide2
Quantum systems, their hallmarks and technological applications. Why can’t Quantum mechanics be observed in solid states.
The nitrogen-vacancy center in diamonds, a unique room-temperature quantum system Using the nitrogen-vacancy as a magnetic sensor for scientific and technological applications
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Outline
Ben
Gurion
University
Atom Chip GroupSlide3
3Quantum
systems
Uncertainty Principle
Superposition
High precision measurement
Quantum computingSlide4
4Quantum
systemsDegrees of freedom splits the energy levels
In solid state we almost always get Electronic band structure
Very short coherence time due to interactions with phonons
Slide5
The Nitrogen-Vacancy center in diamond
Diamond is an FCC carbon crystal
There is natural abundance of nitrogen in the crystal
Vacancy is generated using high energy radiation. The crystal is annealed to trap the vacancies near the N atomsThe resulting center has C3v symmetry and a spin-1 behavior
5Slide6
6The Nitrogen-Vacancy center in diamond
Green light generates optical pumping to
ms
=0.MW repopulates
leading to a reduction in fluorescence.
Magnetic field splits the spectrum
Only the projection across the NV center is measured = orientation dependent Slide7
7The Nitrogen-Vacancy center in diamond
Normalized fluorescence
MW [GHz
]
MW [GHz]
Normalized fluorescence
Fluorescence [a. u]
ms
=-1
ms
=1
The angle with the magnetic field
Slide8
Quantum systems, their hallmarks and technological applications. Why can’t Quantum mechanics be observed in solid states.
The nitrogen-vacancy center in diamonds, a unique room-temperature quantum system Using the nitrogen-vacancy as a magnetic sensor for scientific and technological applications
8
SummerySlide9
Thank You
Ben
Gurion
University
Atom Chip Group
http://www.bgu.ac.il/atomchip/Slide10
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