High-fidelity two-qubit gates at scale are a key requirement to realize the full promise of
quantum computation and simulation. The advent and use of coupler elements to tunably …

High-quality two-qubit gate operations are crucial for scalable quantum information
processing. Often, the gate fidelity is compromised when the system becomes more …

The possibility to utilize different types of two-qubit gates on a single quantum computing
platform adds flexibility in the decomposition of quantum algorithms. A larger hardware …

We demonstrate fast two-qubit gates using a parity-violated superconducting qubit
consisting of a capacitively shunted asymmetric Josephson-junction loop under a finite …

Noise is a significant obstacle to quantum computing, and ZZ crosstalk is one of the most
destructive types of noise affecting superconducting qubits. Previous approaches to …

Cross-resonance (CR) gates have emerged as a promising scheme for fault-tolerant
quantum computation with fixed-frequency qubits. We experimentally implement an …

Recently, significant progress has been made in the demonstration of single-qutrit and
coupled-qutrit gates with superconducting circuits. Coupled-qutrit gates have significantly …

Extending optical nonlinearity into the extremely weak light regime is at the heart of quantum
optics, since it enables the efficient generation of photonic entanglement and …

Efficient decomposition of multiqubit operators is critical in the execution of quantum
algorithms. In this paper, we introduce decompositions of the multiple controlled-Z (ccz and …

Parity detection is essential in quantum error correction. Error syndromes coded in parity are
detected routinely by sequential CNOT gates. Here, different from the standard CNOT-gate …