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Quantum Mechanics in the Labs
Lee In-Goo
Sopheak Seng
0. Contents
(1) Introduction
(2) What we study
(3) Q.M in my lab
(4) Finish
1. Introduction
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Quantum Chaos Applications Lab
Supervisor : Prof. Kim Chill Min
Office : K503
Members : 3 members in master’s course
2 members in doctor’s course
2. What we study
• Designing a micro cavity laser
• Optical power is very low… but
• High Q-factor
• Low threshold
• High density optoelectronic integration
3. Q.M in my lab
Classical Ray Optics
: Reflection rule
Snell’s law
Fresnel’s eq.
Wave equation solution
: Helmholtz equation
→ similar to Schrodinger eq.
The Resonance states are eigen-states for the micro cavity (potential well)
3. Q.M in my lab
Example. Limacon shape
Because of the deformation, the motions get non-linearity
→ Resonance have a difference, according to the initial point
States are perturbed
→ Deformation makes a perturbation!!
4. Finish
• We can see the LINK of the Classical
Mechanics and Quantum Mechanics
through the micro cavities
• And we improve the micro cavity laser
(Q-factor, lasing direction, light power,
etc..)
Introduction to QOQI
Quantum Optics & Quantum Information Lab
• Supervised by:
Prof. Son Wonmin
• Students:
• 4 Integrated Master & Doctoral Course
• 2 Master
• Office: K318B
• http://qoqi.sogang.ac.kr/index.php/Main_Page
QOQI
• What is Quantum Information?
– Study about physical information in
quantum states
– Recent subject (1990s)
• Why use Quantum Mechanics?
QM in QOQI
• “Quantum Cryptography”
Post-process in Quantum Key Distribution
– QM: Q. Superposition + Q. Entanglement +
Information in Q. state = secure
communication
• “Precision Measurement”
– QM: Study application of Entanglement
Conclusion
• QOQI Lab: QM is one the most
important tool for better understanding
of Quantum Information.
Thank you!
Q&A ?