The initialization of superconducting qubits is one of the essential techniques for the
realization of quantum computation. In previous research, initialization above 99% fidelity …

We experimentally demonstrate a recently proposed single-junction quantum-circuit
refrigerator (QCR) as an in situ tunable low-temperature environment for a superconducting …

Quantum magnetometry based on adaptive phase estimation allows for Heisenberg
precision while avoiding creation and maintenance of complex entangled states. However …

The importance and non-trivial properties of superconductor normal metal interfaces were
discovered by Alexander Fyodorovich Andreev more than 60 years ago. Only much later …

We experimentally demonstrate the fast generation of thermal states of a transmon using a
single-junction quantum-circuit refrigerator (QCR) as an in-situ-tunable environment …

Achieving fast and precise initialization of qubits is a critical requirement for the successful
operation of quantum computers. The combination of engineered environments with all …

Recent advancements in circuit quantum electrodynamics have enabled precise
manipulation and detection of the single energy quantum in quantum systems. A quantum …

Recent advancements in circuit quantum electrodynamics have enabled precise
manipulation and detection of a single energy quantum in quantum systems. A quantum …

The interplay between coherent and dissipative dynamics required in various control
protocols of quantum technology has motivated studies of open-system degeneracies …

The ability to fast reset a qubit state is crucial for quantum information processing. However,
to actively reset a qubit requires engineering a pathway to interact with a dissipative bath …