论文标题
朝着高保真度2 Quibit大门的速度限制
Towards the speed limit of high fidelity 2-qubit gates
论文作者
论文摘要
量子门操作的大多数实现都依赖于外部控制字段来驱动量子系统的演变。产生这些控制场需要重大努力来设计合适的控制哈密顿人。此外，控制字段中的任何误差都会减少有关理想目标操作实现的控制操作的保真度。因此，以低错误率实现足够快的门操作仍然是一个巨大的挑战。在这项工作中，我们提出了一种新颖的方法来克服这一挑战，从而消除特定的门操作，完全依赖时间依赖时间。这种方法对于最大化门操作的速度同时消除了相关的错误来源似乎很有用。我们在室温下的钻石中的单个氮散布（NV）中心中介绍了该概念的实验证明。
Most implementations of quantum gate operations rely on external control fields to drive the evolution of the quantum system. Generating these control fields requires significant efforts to design the suitable control Hamiltonians. Furthermore, any error in the control fields reduces the fidelity of the implemented control operation with respect to the ideal target operation. Achieving sufficiently fast gate operations at low error rates remains therefore a huge challenge. In this work, we present a novel approach to overcome this challenge by eliminating, for specific gate operations, the time-dependent control fields entirely. This approach appears useful for maximising the speed of the gate operation while simultaneously eliminating relevant sources of errors. We present an experimental demonstration of the concept in a single nitrogen-vacancy (NV) center in diamond at room temperature.
