吉林大学学报（理学版）Issue(1)：117-120,4.DOI:10.13413/j.cnki.jdxblxb.2015.01.25
利用原子和光腔作用实现受控非门
Implementation of C-NOT Gate in an Optical Cavity with Atoms
摘要
Abstract
First,we prepared two five-levelΛ-type atoms in ground states g 1 >and g 2 >.Next we let them pass through this double-mode (a mode and b mode)optical cavity.And a-mode couples with the transition g >→ e>,b-mode couples with the transition e>→ f >,with the coupling strength g a and g b respectively.We coded the information on the polarized photon states to measure the cavity polarization states after the atoms passed through the cavity. The C-NOT gate is realized by controlling the interaction time of atoms and intra-cavity fields.High fidelity and low photon loss can be realized by selecting reasonable parameters.The numerical results show that to realize C-NOT gate,the cavity with a strong coupling and little decay is necessary.When we set single-photon detuning Δ=0.5g ,and g/k is from 2 to 10,the fidelity can be keeping over 99%.关键词
量子计算机/受控非门/腔量子电动力学/保真度/光子损失Key words
quantum computer/C-NOT gate/cavity QED/fidelity/photon loss分类
数理科学引用本文复制引用
杨红,吴伟,符运良,彭鸿雁,张廷桂..利用原子和光腔作用实现受控非门[J].吉林大学学报（理学版）,2015,(1):117-120,4.基金项目
国家自然科学基金(批准号:51262007)和海南师范大学硕士学科点建设项目(批准号:0020303032202) （批准号:51262007）
