A quantum processor might execute certain computational tasks exponentially faster than a classical processor. Here, using superconducting quantum circuits we design a powerful universal quantum processor with the structure of symmetric all-to-all capacitive connection. We present the Hamiltonian and use it to demonstrate a full set of qubit operations needed in the programmable universal quantum computations. With the device the unwanted crosstalk and ZZ-type couplings between qubits can be effectively suppressed by tuning gate voltages, and the design allows efficient and high-quality couplings of qubits. Within available technology, the scheme may enable a practical programmable universal quantum computer.

量子处理器执行某些计算任务的速度可能比经典处理器快得多。在这里，我们使用超导量子电路设计了一个功能强大的通用量子处理器，具有对称的全对全电容连接结构。我们提出了哈密顿量并用它来演示可编程通用量子计算中所需的全套量子位操作。使用该器件，可以通过调整栅极电压有效抑制量子位之间不需要的串扰和ZZ型耦合，并且该设计允许量子位的高效和高质量耦合。在现有技术范围内，该方案可以实现实用的可编程通用量子计算机。