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Physical Realization of Quantum C-Not Gate |
| HUO Jian-Li;WANG Shun-Jin;TAO Jun |
| Center of Theoretical Physics, School of Physics and Technology, Sichuan University, Chengdu 610064 |
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| Cite this article: |
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HUO Jian-Li, WANG Shun-Jin, TAO Jun 2008 Chin. Phys. Lett. 25 813-816 |
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Abstract We investigate a Heisenberg spin cluster with two particles controlled by a time-dependent magnetic field. The system is controlled by tuning the amplitude, frequency, and interaction time of the three-step time-dependent magnetic field. Then we solve the time-dependent Schrodinger equation of the two-particle system, and obtain the time evolution operator. By the
three-timestep interaction, the wavefunction evolves from the initial state to the final state, and the total evolution operator can be expressed as a product of the three evolution operators. By adjusting the physical parameters, the key two-qubit logic gate, the C-Not gate, can be realized physically.
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| Keywords:
03.65.Ge
03.67.-a
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Received: 17 October 2007
Published: 27 February 2008
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| PACS: |
03.65.Ge
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(Solutions of wave equations: bound states)
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03.67.-a
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(Quantum information)
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