Speedup of quantum state transfer by three- qubit interactions: Implementation by nuclear magnetic resonance

Details Speedup of quantum state transfer by three- qubit interactions: Implementation by nuclear magnetic resonance Speedup of quantum state transfer by three- qubit interactions: Implementation by nuclear magnetic resonance

2005-12-25

arxiv.org/abs/quant-ph/0512229v3

Phys. Rev. A, 73, 062325 (2006)

Physics

Quantum Physics

Comments are welcome to Jingfu@e3.physik.uni-dortmund.de or zhangjfu2000@yahoo.com. More experimental results are added

Scientific paper

10.1103/PhysRevA.73.062325

Universal quantum information processing requires single-qubit rotations and two-qubit interactions as minimal resources. A possible step beyond this minimal scheme is the use of three-qubit interactions. We consider such three-qubit interactions and show how they can reduce the time required for a quantum state transfer in an XY spin chain. For the experimental implementation, we use liquid-state nuclear magnetic resonance (NMR), where three-qubit interactions can be implemented by sequences of radio-frequency pulses.

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