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November 26, 2007

Dwave's Quantum computer Presentation from SC07

Dwave systems CTO Geordie Rose has published his slides from the SC07 conference, where he demonstrated there latest 28 qubit system.


Dwave system is a web services QUBO solver


Dwave to a computer scientist. QUBO is NP-hard. the decision version is NP complete


Real physical systems


dwave device schematic: nobium cjj rs-squid flux qubit


Dwave approach to AQC

dwave superconducting chip: bipolar couplers
dwave superconducting chip: bipolar couplers

dwave potential energy of Adiabatic quantum computer can be programmed by user
dwave potential energy of Adiabatic quantum computer can be programmed by user


Device physics : the hamiltonian


Qubit manipulation: modulate the barrier height


Qubit manipulation: tilt the double well


Readout bias: direction of the current


Dwave picture of the chip: readout section


dwave device schematic: symmetric bipolar coupler

The Dwave AQC implements both the AQC model and the quantum annealing model.


adiabatic quantum computation model


Quantum annealing model


Dwave implementing part of the image matching as AQC, part is a regular computer program.


The steps to run an adiabatic quantum computer

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