Ppt on modern physics on reflection and transmission across a step and regular potential barrier

It has many great ideas about phenomenon of modern physics

1. Title Slide

Title : Refection and Transmission
Across a step and Regular Potential
Barrier

Presented by: Kamal Kant
Roll no. – 2023/13/064

2. •Introduction :
1.What happens when particles encounter
potential changes ?

2.Quantum tunneling and reflection VS
classical expectations

3.Importance in quantum devices and nano
– technology

3. •The Step Potential:
A step potential refers to a situation
where a particle encounters a sudden
change in potential energy—like a "step"
in the potential energy landscape. This is
a classic problem used to study quantum
tunneling and wave function behavior.

4. • Mathematical Formulation
(Step Potential) :

5. •Reflection and Transmission
Coefficients :
1.Reflection coefficient : R = |B/A|
2


2.Transmission Coefficient : T = |C/A|2

3.Conservation : R+T = 1

6. •Potential Barrier
(Square Barrier) :

7. •Mathematical Solution (Barrier) :

8. •Tunneling and Transmission
Probability :

9. •Applications :
1.Scanning Tunneling Microscope (STM)
2.Quantum tunneling in nuclear fusion
3.Semiconductor devices (tunnel diodes,
MOSFETs)
4.Alpha decay