论文标题
在超导量子位和可调耦合器的超导速度中实现绝热和绝热CZ门
Realisation of adiabatic and diabatic CZ gates in superconducting qubits coupled with a tunable coupler
论文作者
论文摘要
高富达两分之二的门对于扩大超导数量的基础是基础。我们使用两个量子位，该量子通过频率可调的耦合器耦合，可以调节耦合强度，并使用两个不同的方案（即绝热和绝世方法）演示CZ门。基于Clifford的随机基准测试（RB）方法用于评估和优化CZ Gate Fidelity。绝热和绝热CZ门的忠诚度分别为99.53（8）％和98.72（2）％。我们还分析了反应性引起的误差。与绝热CZ门的30 ns持续时间相比，绝热CZ门的持续时间为19 ns，显示出低相干性错误率$ r'_ {\ rm {\ rm {int}} $ = 0.0197（5）$ = 0.0197（5），比$ r _ {\ rm rm {\ rm rm {\ rm {incoherenct，int int int} $ = 0.00.00.00.00.00.00.00.0} $ = 0.00.00.00.00.00.00.00.0} $ = 0.00。
High fidelity two-qubit gates are fundamental for scaling up the superconducting number. We use two qubits coupled via a frequency-tunable coupler which can adjust the coupling strength, and demonstrate the CZ gate using two different schemes, adiabatic and diabatic methods. The Clifford based Randomized Benchmarking (RB) method is used to assess and optimize the CZ gate fidelity. The fidelity of adiabatic and diabatic CZ gates are 99.53(8)% and 98.72(2)%, respectively. We also analyze the errors induced by the decoherence. Comparing to 30 ns duration time of adiabatic CZ gate, the duration time of diabatic CZ gate is 19 ns, revealing lower incoherence error rate $r'_{\rm{incoherent, int}}$ = 0.0197(5) than $r_{\rm{incoherent, int}}$ = 0.0223(3).
