Superconducting quantum bit structure with adjustable adjacent bit coupling strength

Abstract

The invention discloses a superconducting quantum bit structure with adjustable adjacent bit coupling strength. The superconducting quantum bit line comprises a first superconducting quantum bit line,including a capacitor C1, an inductance (shown in the specification) and a Josephson junction (shown in the specification). The capacitor C1 is connected with the inductor C1 in series, and the capacitor C1 is connected with the inductor C1 in series. The capacitor C1 is connected with the inductor C1 in series. The inductor C1 is connected with the inductor C1 in series. The capacitor C1 and theinductor (1) are connected in series, and the capacitor C1 and the inductor (1) are connected in parallel after the capacitor C1 and the inductor (1) are connected in series. The capacitor C1 and theinductor (1) are connected in series. Two ends of each of the first end and the second end of each of the first end, the second end and the third end. The superconducting quantum bit line also comprises a second superconducting quantum bit line, including a capacitor C2, an inductance (shown in the specification) and a Josephson junction (shown in the specification). The capacitor C2 and the inductor C2 are connected in series, and the inductor C2, the capacitor C2 and the inductor C2 are connected in series. The capacitor C2, the inductor C2 and the inductor C2 are connected in series. Capacitor C2 and inductor (shown in the specification) which are connected in series are connected to the capacitor C2 and the inductor (shown in the specification) in parallel, and the capacitor C2 and the inductor (shown in the specification) are connected to the capacitor C2 and the inductor (shown in the specification) in series. The number of the terminals is two, and the number of the terminals is two. The superconducting quantum bit structure also comprises a coupling loop, including a Josephson junction Lk forming a loop, an inductance (shown in the description) and an inductance (shown inthe description) as well as inductance (shown in the description) wherein the formula (1) is shown in the specification, and the formula (2) is shown in the specification. One end of the Josephson junction Lk is connected between the capacitor C1 and the inductor (please see the formula in the specification), and the other end of the Josephson junction Lk is connected between the capacitor C1 andthe inductor (please see the formula in the specification). The other end of the capacitor C2 is connected between the capacitor C2 and the inductor (please see the formula in the specification). Theother end of the capacitor C2 is connected between the capacitor C2 and the inductor (please see the formula in the specification); Inductance (shown in the description) and inductance (shown in the description) as well as inductance (shown in the description) According to the structure, the fidelity of the double-quantum-bit CZ gate is further improved, so that the precision of quantum calculation is improved, the expansibility is high, and the application of superconducting quantum calculation is promoted.

Description

technical field [0001] The disclosure belongs to the technical field of quantum computing, and relates to a superconducting qubit structure with adjustable adjacent bit coupling strength. Background technique [0002] As the size of transistor chips is getting smaller and closer to the limit, the computing performance of traditional classical computers is gradually reaching its peak. Quantum computer is a potential alternative to existing classical computers. Its principles and related algorithms have been extensively studied in the last century. Quantum computing has principles in many mathematical problems such as factorization of large prime numbers and global search. solution speed advantage. Scientists have now established different quantum systems and implemented some simple quantum algorithms, among which superconducting quantum computing is the most promising quantum computing system. [0003] In quantum computing systems, the most important thing is to realize hig...

AI Technical Summary

Problems solved by technology

However, in existing multi-qubit systems, it is difficult for adjacent qubits with fixed coupling strength to completely shut

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