Integrated electronic optical switches in future chip ion trap . Shu, Gang 5/24/2006. Basic concepts of Quantum Computer Ion trap technology Optical Switches in future traps Conclusions. Basic concepts of Quantum Computer Ion trap technology Optical Switches in future traps Conclusions.
A quantum computer is any device for trap computation that makes direct use of distinctively quantum mechanical phenomena, such as superposition and entanglement, to perform operations on data.
A mathematics system that can represent and solve general problems.
A physical system that can realize the mathematics system.
Classical computers are based on real space and realized by macro physics laws (electronics)
Quantum computers are based on functional spaces and realized by quantum mechanics.
Quantum computers supply a new way to express and attack hard problems.
Any other ways? QFT?
Well, any realizable system described by a special mathematics may be a choice.
1. We’re approaching the limit of classical chip. The linear increasing computation ability will never catch up with nonlinear increasing complexity.
Quantum Algorithms and QC
2. Physicists never forget physics:
We want to study complicated quantum system, why not simulate it with a quantum device?
3. If QC is only a dream, maybe Quantum Algorithms will shine light to some hard problems.
No universal algorithm yet
some very promising ones such as Shor’s factoring algorithm
which will cause trouble to traditional information security and push people to Quantum information…
A state vector carrying all information and our hope.
Need a quantum system well isolated from environment
Need some interactions turned on and off as wish
Trapped single ions are isolated from each other
Lasers are nice and controllable, to cool and operate the ions
Use rotating hyperbolic electric field to form a pseudo potential well to trap a ion, and use laser to cool the ion
Our trap and ions
A possible QC scheme
Easiest to think of but not easy to do elements:
Not so reliable
Very fast !
Very reliable ! – no moving parts
Easier to build ! – just layers
Use 493nm blue light as example:
Waveguide dimension guided wave profile two guides coupling
100% coupling: L=1.09966mm
Some designs elements:
The trap and the wave guide. elements:
What else can be integrated?
Thank you! quantum computer.
Dept. of Phys.