Engineering high-coherence superconducting qubits

Stabilizing Entanglement via Symmetry-Selective Bath Engineering in Superconducting Qubits.

Bath engineering, which utilizes coupling to lossy modes in a quantum system to generate nontrivial steady states, is a tantalizing alternative to gate- and measurement-based quantum science. Here, we demonstrate dissipative stabilization of entanglement between two superconducting transmon qubits in a symmetry-selective manner. We utilize the engineered symmetries of the dissipative environmen...

Superconducting phase qubits

Experimental progress is reviewed for superconducting phase qubit research at the University of California, Santa Barbara. The phase qubit has a potential advantage of scalability, based on the low impedance of the device and the ability to microfabricate complex “quantum integrated circuits”. Single and coupled qubit experiments, including qubits coupled to resonators, are reviewed along with ...

Superconducting Qubits Ii : Decoherence

This is an introduction to elementary decoherence theory as it is typically applied to superconducting qubits. Abbreviations: SQUID – superconducting quantum interference device; qubit – quantum bit; TSS – two state system

Wiring Up Superconducting Qubits

A Viewpoint on: Realization of Microwave Quantum Circuits Using Hybrid Superconducting-Semiconducting Nanowire Josephson Elements G. de Lange, B. van Heck, A. Bruno, D. J. van Woerkom, A. Geresdi, S. R. Plissard, E. P.A.M. Bakkers, A.R. Akhmerov, and L. DiCarlo Physical Review Letters 115, 127002 2015 – Published September 14, 2015 Semiconductor-Nanowire-Based Superconducting Qubit T.W. Larsen,...

A 4 Superconducting Qubits