… Superconducting qubits 7 , 8 have allowed the realization of strong 9 , 10 and ultrastrong
11 , 12 , 13 coupling … By inductively coupling a flux qubit and an LC oscillator via Josephson …

… review of the entire field of superconducting qubits and their broad applicability for … In
Section 2, we review progress toward improving qubit coherence (Section 2.1), improved …

… of the superconducting qubit is twice the frequency of the resonators, we show that one qubit
is able … state (7), we introduce the even and odd coherent states (the Schrödinger cat states) …

… We have observed coherent time evolution between two quantum states of a superconducting
flux qubit comprising three Josephson junctions in a loop. The superposition of the two …

… coherence and successive decay dynamics of higher energy levels of a superconducting
transmon qubit. … sequential transition frequency, we excite the qubit from the ground state up to …

… is the implementation of circuit QED-based architectures using superconducting qubits. While
qubit coherence times and coupling schemes have improved immensely in recent years [1…

… coherence properties of the junctions by employing them in superconducting transmon qubits…
In time domain experiments, we find that both, the qubit life- and coherence time of our best …

… Through improved understanding of spontaneous emission 25 and careful microwave
engineering, we now attain state-of-the-art ∼1 µs coherence times in a two-qubit device. This …

… We use a pulsed scheme to coherently transfer the quantum state of the qubit into a
nanomechanical mode by a piezoelectric swap operation, and subsequently convert it to the optical …

… Also, the difficulty of switching on/off interbit couplings (see, eg, [1]) strongly limits the …
two-qubit gates. Here we propose an approach to coherently transfer the populations of qubit states …