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17 was published in an article in the July issue of the journal Nature, a Josephson phase qubit in a superconducting electronic circuit known as developed in the laboratory using the martinis UCSB physicists Max Hofheinz, John Martinis, and Andrew Cleland documented, a controlling the microwave photons, one at a time of a superconducting microwave resonator at the pump.
Up to six photons were pumped into the sound, and their presence qubit, which acts like an electronic atom, as shown with the Analyzer will. Photon number states, known as Fock states, have never been made in a controlled manner, Cleland said.
"These states are the lessons they are learning in introductory quantum mechanics, but no one was able to create a controlled manner before" Cleland said.
Using the same technique, the researchers also another type of special state, superconducting resonator made known as a coherent state. These states are relatively easy to build, and seems to behave in a completely non-quantum mechanics, but with the same analysis technique, UCSB researchers were able to demonstrate the expected underlying quantum behavior.
Hofheinz, a postdoctoral researcher in Germany, which at UCSB for the past year have worked on this project explains how the resonator.
"The resonator is equal to the power of a pendulum," Hofheinz said. "In quantum mechanics, energy, or range of motion of this pendulum, only comes in finite steps, in quanta., Carefully prepared the resonator in these quantum states, and proved that I do it in a controlled manner and then the pendulum can measure states 'fired' directly, a process in which the amplitude can take on any value, and appears to be limited for some of these, however. If you resonator with our qubit Look at what we see. the steps that dimension, but in some of the resonant states in exactly the same time, so that on average, the quantum states does not appear to be confined to. "
Spent several months in Hofheinz UCSB Nanofabrication cleanroom equipment used for manufacturing use. "This is the resonator, if you're excited," "a very long time," he said swing. "The early indications do not swing that produced more quickly. We long for the new resonator to oscillate work was to arrange the production process." Then fine-tune the signal to emit microwave electronics built by Martinis group really need to achieve these excellent results. Says Martinis, Cleland, and Hofheinz, his research in pursuit of building a quantum computer is possible that both government and industry for a long time could have been looking for help. Or create - - A quantum computer can be used to break encryption codes used for secure communications
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