The Intention of Making this Presentation is to Explain The Practical Potential of Our Combs, Which May Not Naturally Occur To Everyone! ​ Target Audience: General Public

1. How Can Our Combs
Change The World?
Adarsh Ganesan, Ph.D.
adarsh.ganesan@cantab.net
11th December 2018

2. Won’t It Be Nice To Have
An Ultra-Fast WiFi In A Crowded Hall?

3. “You Will Then Need
A Long Array Of Radio Channels,
At Your Disposal!”
Hint: WiFi With Multiple Access Points!

4. Won’t It Be Better To Completely Stay
Alert To These Dangers?
Landslides Avalanches Floods

5. “You Will Then Need To Precisely
Sense Climate Change!”
Monitor The Weather Parameters Including
Temperature, Humidity & Wind Speed And Atmospheric Gas Concentration!

6. Won’t It Be Good To
Get Rid Of This Danger As Well?

7. “You Will Then Need
To Precisely Understand
Human Behavior!”
Indoor Monitoring Of Human Motion Using Inertial Sensors!

8. Heard Of Internet-Of-Things?

9. The Internet-Of-Things Is A
Prevailing Idea To Connect All
Our Electronic Devices, Vehicles &
Home Appliances To The Internet!

10. And The Internet-Of-Things
Requires High-Accuracy Clocks
For Greater Synchronization!

11. So We Are Now In Search Of
High-Accuracy Clocks,
High-Precision Sensors &
Broadband Radios!

12. Won’t It Be Great To Have All These
Superior Clocks, Sensors and Radios, Also
Highly Compact & Power Efficient?
To Save Space & Energy For Different Useful Things!

13. Here You Go, We Are Now In A Mission To
Develop Our Future Companions!
High-Precision
Sensors
High-Accuracy
Clocks
Broadband
Radios

14. Can We Engineer All These
Using One Single Physics Concept?

15. More Specifically, Using
Our Own Comb Concept?

16. But What Is
Our Comb Concept?

17. Take A Violin String!

18. Now, Push It Back And Forth!
Time
Up
Down

19. And Look At The Way It Moves!
Time
?
Up
Down

20. And It Does Not Move Like
The Way You Had Pushed!
Time
Up
Down

21. Instead, It Moves In An Unimaginable
Way!
Time
Up
Down

22. And I Called This Eureka Stuff As Combs!
Time
Combs!Up
Down
Since We Create An Evenly Spaced “Teeth” Of Frequencies Through These Oscillations, I Had Called These ‘Combs’!

23. So This Is The Comb Concept!
Time
Time
Up
Down
For A Push
Like This!
The String Moves
Differently!
To Know More, Search: Phononic Frequency Combs!
Up
Down

24. But The Concept Is Only True …
Time
Up
Down
Time
Up
Down
For A Push
Like This!
The String Moves
Differently!

25. … If I Choose T & F Correctly!
Time
Up
Down
Time
Up
Down
To Know More, Search: Phononic Frequency Combs!
‘T’
‘F’

26. Further, If I Happen To
Choose An Excellent
Combination of T & F,

27. 𝝉 In This Graph
Can Even Become Nearly Insensitive
To The Environment!
𝜏
Time
Further, If I Happen To
Choose An Excellent
Combination of T & F,

28. And Such An Insensitive Comb Can Be
A Powerful Clock!
Highly Synchronized
Internet-Of-Things

29. With A Different
Combination of T & F, …

30. 𝝉 In This Graph
Can Be Made Highly Sensitive
To The Environment!
𝜏
Time
With A Different
Combination of T & F, …

31. To Stay Away
From Dangers!
And Such A Comb Can Be
A Beautiful Sensor!

32. With Another Set of
T & F, …

33. With Another Set of
T & F, …
𝔀 In This Graph
Can Be Made Shorter!
𝓌 𝓌
Time

34. Frequency
And Such A Shorter Comb Can
Instantaneously Lead To
Multiple Radio Channels, …
To Enable An Ultra-Fast WiFi
Even In A Crowded Conference Hall!

35. So Powerful Clocks, Beautiful Sensors And
Broadband Radios Are All Contained In
This One Lucrative Comb Treasure Box!

36. And The Key To Open
This Box Is
The Right Set of T & F Values!
T & FTime
T
F

37. But How To Choose
The Right Set of T & F Values?
T & FTime
T
F

38. A Mathematical Equation
Published In 1955 By A Famous Scientist: Enrico Fermi,
Working Alongside His Colleagues!
To Know More About This Equation, Search: Fermi-Pasta-Ulam Dynamics!
The Answer Lies In

39. And, Using This Equation,
We Can Find Out
The Best T & F Values

40. To Engineer A New World
Which Enjoys
Monitors
Of Dangers
Better
Connectivity
Among Devices
Ultra-Fast WiFi

41. So Come!
Let Us Change The World
With Our Combs!