Download Isaac Chuang - Center for Bits and Atoms

quanta
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Isaac Chuang
Aram Harrow, Andrew Houck, Steve Huang, Murali Kota, Geva
Patz, Matthias Steffen, Andrew Childs*, Jeff Brock, Terri Yu
MIT Center for Bits and Atoms
The Quantum Limit
2020
What happens when 1 bit = atom?
1 nanometer
1986
1879
i386
1 inch
1 micrometer
Quantum Information &
Quantum Computation
Challenges we are working on:
(1) Large-scale QC?
(2) New cryptographic primitives
(3) Education
Quantum Factoring
( Vandersypen, Steffen, Breyta Sherwood, Yannoni, and Chuang, Nature, Dec. 2001 )
• First demonstration of
• The Molecule
Shor’s factoring algorithm
15 = 3 x 5
CNN,
T2 > 0.3 sec
~ 200 gates
Large-Scale QC
• Polymers as quantum computers
( Majornska, Kubinec, Chuang, J. Chem. Phys., Mar 2000 )
• Nuclear spins of 31P in Si
• Electron spins with SiGe FET’s
( Yablonovitch, quant-ph 9905096 )
( Kane, Nature 393, p133, 1998 )
Quantum Supercomputers?
• IEEE Computer: Jan 2002, p 79
General-Purpose QC Architecture
Spin Polarized Electrons
Classical
Microprocessor
EX
Qubits
Pur
EPR
Classical Bus
Quantum Bus
• Teleportation connects comp. units
• Self-refreshing memory
• Parallel quantum ALU
• Classical microprocessor control
• Dynamic compilation
• Scheduling
Quantum Information
• Quantum bits cannot be copied!
• Provably secure communication system
for times when “Pretty Good”
Privacy just isn’t good
enough
• Quantum software: single-use!
( Gottesman and Chuang, Nature, Nov. 25, 1999 )
• Quantum Digital Signatures
Provably secure message authentication
Education & Outreach
How do we train a new generation of quantum
information scientists?
(1) Teaching materials
(2) HP/MIT QC course
(3) MAS.961 / 8.371J course
(4) MIT 8.14 Junior Experimental Lab
Quantum Information Processing
MIT Junior
Physics Laboratory
Spring, 2002
Purpose
This experiment will let you perform a
series of simple quantum computations
on a two spin system, demonstrating
one and two quantum-bit quantum logic
gates, and a circuit implementing the
Deutsch-Jozsa quantum algorithm
History
• Founded by Prof. David Cory
• Ran at MIT Media Laboratory this year
• Permanent Phys. Dept. setup under
construction
Experiment
#42
Quantum Information Processing
MIT Junior
Physics Laboratory
Spring, 2002
Purpose
This experiment will let you perform a
series of simple quantum computations
on a two spin system, demonstrating
one and two quantum-bit quantum logic
gates, and a circuit implementing the
Deutsch-Jozsa quantum algorithm
Accomplishments
• 10 undergraduates ran experiments
• Most popular unit in class
• First new experiment in >4 years
• Coordinated with undergrad QM class
Experiment
#42