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arXiv quant-ph/0310015quant-ph
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一种利用离子自旋分子和微波辐射的量子计算机

A quantum computer using a trapped-ion spin molecule and microwave radiation

D. Mc Hugh, J. Twamley

摘要:

我们提出了一种新的设计的量子信息处理器,量子比特被编码成超精细状态的离子保持在一个线性阵列的单独定制的微陷阱和坐在一个空间变化的磁场。磁场梯度引入空间依赖的量子位跃迁频率和量子位之间的自旋-自旋相互作用类型。单量子位和多量子位操作是通过共振微波脉冲实现的,如在液体NMR量子计算中,而量子位读出和复位是通过捕获离子荧光搁置技术实现的。通过调整微陷阱的配置,我们可以在硬件中定制量子比特的谐振频率和耦合强度。我们表明,该系统具有边带过渡结构,它不与处理器的大小,允许量子位之间的可扩展的频率歧视的规模。通过使用大的磁场梯度,可以经由频率选择性光脉冲来读出和重置离子链中的量子位,从而避免需要许多紧密聚焦的激光束来进行空间量子位寻址。

英文摘要:

We propose a new design for a quantum information processor where qubits are encoded into Hyperfine states of ions held in a linear array of individually tailored microtraps and sitting in a spatially varying magnetic field. The magnetic field gradient introduces spatially dependent qubit transition frequencies and a type of spin-spin interaction between qubits. Single and multi-qubit manipulation is achieved via resonant microwave pulses as in liquid-NMR quantum computation while the qubit readout and reset is achieved through trapped-ion fluorescence shelving techniques. By adjusting the microtrap configurations we can tailor, in hardware, the qubit resonance frequencies and coupling strengths. We show the system possesses a side-band transition structure which does not scale with the size of the processor allowing scalable frequency discrimination between qubits. By using large magnetic field gradients, one can readout and reset the qubits in the ion chain via frequency selective optical pulses avoiding the need for many tightly focused laser beams for spatial qubit addressing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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