/
gliederung
50 lines (45 loc) · 1.38 KB
/
gliederung
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
1. Motivation
What for?
quantum computations
low-power transistor
Why spins?
low decay rates
little power consumption
intrinsic QM property
Prior art
ferromagnetic materials
+ very good spin separation
# TODO: picture of hard disk; Giant magneto resistance
- hard to handle technologically
- metals => unwanted Schottky junctions
- not tunable
=> unusable in CPUs
2. Basics
Rashba Spin-Orbit Interaction
From Dirac equation
in solids: gap smaller => larger effect
k-dependent SO-coupling
Fisher-Lee relation
Green's Functions
# TODO: picture excitation + response
Fisher-Lee relation
discretization
3. Setup: Interface at an angle
Analytical calculations
Khodas' approach
critical effects
but only in chiral basis
adapting to z-direction
Numeric calculations
enumerating sites
matrix sizes
interfaces
4. Results
Rough agreement simulation <=> analytical calculation
difference: number of modes, effective model
Some spin separation survives (20% max)
5. Summary
Spins are very interesting for quantum comptuation
Non-magnetic materials necessary for future scaling
Rashba SO-coupling: critical filtration in chiral basis
Up to 20% survive in non-chiral basis