Quantum computers leverage quantum bits (qubits) which can exist in multiple states simultaneously, outperforming classical computers in specific computations. The concept was proposed by Yuri Manin in 1981 and further developed by Richard Feynman, emphasizing that classical computers cannot simulate certain quantum calculations effectively. Future quantum processors may achieve immense computational power, potentially surpassing the number of atoms in the observable universe.

2. Quantum
Computers
TAUKI TAHMID
BRAC UNIVERSITY

3. MORE TRANSISTORS = MORE POWER
Center of the CPU, current state

4. “The number of transistors on
a chip will approximately double
every 24 months”
-- Gordon Moore, Intel Co-Founder

5. Quantum Computing
QBITS
QUANTUM SUPER POSITION

6. Bits (classical computing)
 A bit can exist only in one
state
Either 0 or 1
 Information behaviour : one
single direction
 Logic gates are irreversible
0010101110101010101011101010111111101001001010101001010100000000001101001110101

7. Bloch Sphere representation of a QBIT
a two-state quantum-mechanical system
 Can exist as 0 or 1 or
coherent superposition of
both
 Operation on a qubit
effectively acts on both
values at a same time
 An exist in both values
simultaneously
QUBITS/QBITS

8. BITS QBITS
1 BIT 1 QBITS
0
OR
1
0
AND
1
AT A TIME
1
ON/TRUE
0
OFF/FALSE

9. Using transistors

10. Processors
Classical processors
Each processor perform one
computation,while other
processors do other
computations
Quantum processors
Single processor can
perform multiple
computations on its own
simultaneously

12. One day, a 2^500 qubit computer will be able to
calculate more data than there's atom in our
observable universe

13. Representation of Data -
Superposition
 A single qubit can be forced into a superposition
of the two states denoted by the addition of the
state vectors:
|ψ> = α |0> + α |1>
 Where α and α are complex numbers and |α |
+ | α | = 1

17. Quantum computer
 Use direct use of quantum mechanical
phenomena
 Utilizes quantum properties to represent data
 Could solve certain problems much faster

18. .
.
.
Steps a conventional computer will
take to determine where to shoot
the ball
0 < y < 100
Steps a quantum computer will take
to dertermine where to shoot

19. ● In 1981, German Mathematician Yuri Manin first introduced the idea of Quantum
computers
● A year later, eminent physicist Richard Faynmann presented a logical model at the
conference on physics and computerization but his model rested in the conviction
that it would be impossible to simulate the calculations through a classical computer
● But Faynman's lectures from the last years of his scientific research is now
considered by many to be the key moments
HISTORY
Richard Faynmann Yuri Manin

20. Photograph of a chip constructed by D-Wave Systems Inc

21. D~WAVE 2X

22. FIN