Nitrogen-Vacancy Center in Diamonds Physics and Magnetometry
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Nitrogen-Vacancy Center in Diamonds Physics and Magnetometry
description
Nitrogen-Vacancy Center in Diamonds Physics and Magnetometry. Atom Chip Group. Ben Gurion University. Atom Chip Group. Ben Gurion University. Outline. Quantum systems, their hallmarks and technological applications. Why can’t Quantum mechanics be observed in solid states. - PowerPoint PPT Presentation
Transcript of Nitrogen-Vacancy Center in Diamonds Physics and Magnetometry
Nitrogen-Vacancy Center in Diamonds Physics and Magnetometry
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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
Outline
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Quantum systems
¿ Δ 𝑋>¿ Δ𝑝>≥ ℏ2
Uncertainty Principle Superposition
High precision measurement Quantum computing
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Quantum systems
Degrees 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
𝑚𝑠=−12
𝑚𝐼=12
𝑚𝑠=12
𝑚𝐼=−12
𝑚𝐼=12
𝑚𝐼=−12
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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 atoms• The resulting center has C3v symmetry and a spin-1
behavior
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The 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 spectrumOnly the projection across the NV center is measured = orientation dependent
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The Nitrogen-Vacancy center in diamond
2.8 2.9
0.97
0.98
0.99
Nor
mal
ized
fluo
resc
ence
MW [GHz]
𝐵≈15𝐺𝐵≈0 .5𝐺
2.8 2.90.9
0.95
MW [GHz]
Nor
mal
ized
fluo
resc
ence
0 1 2
0.35
0.36
0.37
Time [s]
Fluo
resc
ence
[a. u
]
R = 2.15 MHz
T2* =0.56 s
Fluo
resc
ence
[a
. u]
ms=-1
ms=1
The angle with the magnetic field
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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
Summery
Thank You
http://www.bgu.ac.il/atomchip/
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𝑚𝑠=−12
𝑚𝐼=12
𝑚𝑠=12
𝑚𝐼=−12
𝑚𝐼=12
𝑚𝐼=−12
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