Chin. Phys. Lett.  2005, Vol. 22 Issue (9): 2147-2150    DOI:
Original Articles |
Two-Qubit Quantum Logic Gate in Molecular Magnets
HOU Jing-Min1,2;TIAN Li-Jun3;GE Mo-Lin2
1Department of Physics, Southeast University, Nanjing 210096 2Theoretical Physics Division, Nankai Institute of Mathematics,Nankai University, Tianjin 300071 3Department of Physics, Shanghai University, Shanghai 200436
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HOU Jing-Min, TIAN Li-Jun, GE Mo-Lin 2005 Chin. Phys. Lett. 22 2147-2150
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Abstract We propose a scheme to realize a controlled-NOT quantum logic gate in a dimer of exchange coupled single-molecule magnets, [Mn4]2. We chosen the ground state and the three low-lying excited states of a dimer in a finite longitudinal magnetic field as the quantum computing bases and introduced a pulsed transverse magnetic field with a special frequency. The pulsed transverse magnetic field induces the transitions between the quantum computing bases so as to realize a controlled-NOT quantum logic gate. The transition rates between a pair of the four quantum computing bases and between the quantum computing bases
and excited states are evaluated and analysed.
Keywords: 03.67.Lx      75.50.Xx      75.10.Jm     
Published: 01 September 2005
PACS:  03.67.Lx (Quantum computation architectures and implementations)  
  75.50.Xx (Molecular magnets)  
  75.10.Jm (Quantized spin models, including quantum spin frustration)  
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http://cpl.iphy.ac.cn/       OR      http://cpl.iphy.ac.cn/Y2005/V22/I9/02147
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