Room temperature quantum coherence in a potential molecular qubit
Room temperature quantum coherence in a potential molecular qubit
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DOI：
10.1038/ncomms6304
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发表时间：
2014-10-01
影响因子：
16.6
通讯作者：
van Slageren, Joris
中科院分区：
文献类型：
--
作者：
Bader, Katharina;Dengler, Dominik;van Slageren, Joris
量子计算机的成功开发将改变世界，目前的互联网加密方法将停止发挥作用。然而，由于缺乏合适的量子比特，目前还没有开发出能够与传统计算机相媲美的工作量子计算机。量子比特的一个关键特性是相干时间。过渡金属配合物是非常有前途的量子比特，因为它们易于表面沉积和化学可调性。然而，报道的量子相干时间并不令人印象深刻。在这里，我们报告了低温下68 μ s的过渡金属配合物（量子比特值Q(M) = 3,400）和室温下1 μ s的量子相干时间，远高于先前报道的此类系统的值。我们表明，这一成就是由于晶格的刚性以及从磁性离子附近去除核自旋。
The successful development of a quantum computer would change the world, and current internet encryption methods would cease to function. However, no working quantum computer that even begins to rival conventional computers has been developed yet, which is due to the lack of suitable quantum bits. A key characteristic of a quantum bit is the coherence time. Transition metal complexes are very promising quantum bits, owing to their facile surface deposition and their chemical tunability. However, reported quantum coherence times have been unimpressive. Here we report very long quantum coherence times for a transition metal complex of 68 mu s at low temperature (qubit figure of merit Q(M) = 3,400) and 1 mu s at room temperature, much higher than previously reported values for such systems. We show that this achievement is because of the rigidity of the lattice as well as removal of nuclear spins from the vicinity of the magnetic ion.