Cao Y, Wang G C, Liu H D, Sun C F
Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun, 130024, China.
Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, China.
Sci Rep. 2018 Apr 11;8(1):5813. doi: 10.1038/s41598-018-24214-4.
The Toffoli gate (controlled-controlled-NOT gate) is one typical three-qubit gate, it plus a Hadamard gate form a universal set of gates in quantum computation. We present an efficient method to implement the Toffoli gate using an array of coupled cavities with one three-level atom in each cavity. The large detuning between atoms and classical (quantum) fields plays an important role and the gate is implemented in one-step. The quantum information is encoded into the low-lying states of identical atoms and it is convenient to address qubit individually. Based on the Markovian master equation, it is shown that the scheme to implement the Toffoli gate is robust against the decoherence.
托佛利门（受控受控非门）是一种典型的三量子比特门，它与一个哈达玛门构成了量子计算中的通用门集。我们提出了一种利用一系列耦合腔实现托佛利门的有效方法，每个腔中有一个三能级原子。原子与经典（量子）场之间的大失谐起着重要作用，并且该门是一步实现的。量子信息被编码到相同原子的低能态中，并且便于单独处理量子比特。基于马尔可夫主方程，结果表明实现托佛利门的方案对退相干具有鲁棒性。
