Towards understanding two-level-systems in amorphous solids: insights from quantum circuits
Amorphous solids show surprisingly universal behaviour at low temperatures. The
prevailing wisdom is that this can be explained by the existence of two-state defects within …
prevailing wisdom is that this can be explained by the existence of two-state defects within …
Material matters in superconducting qubits
CE Murray - Materials Science and Engineering: R: Reports, 2021 - Elsevier
The progress witnessed within the field of quantum computing has been enabled by the
identification and understanding of interactions between the state of the quantum bit (qubit) …
identification and understanding of interactions between the state of the quantum bit (qubit) …
Surpassing millisecond coherence in on chip superconducting quantum memories by optimizing materials and circuit design
The performance of superconducting quantum circuits for quantum computing has advanced
tremendously in recent decades; however, a comprehensive understanding of relaxation …
tremendously in recent decades; however, a comprehensive understanding of relaxation …
High-coherence fluxonium qubit
We report superconducting fluxonium qubits with coherence times largely limited by energy
relaxation and reproducibly satisfying T 2> 100 μ s (T 2> 400 μ s in one device). Moreover …
relaxation and reproducibly satisfying T 2> 100 μ s (T 2> 400 μ s in one device). Moreover …
Gate-based superconducting quantum computing
Quantum computing is considered as a next-generation information processing technology.
The basic element of a quantum computing system is a quantum bit, often called a qubit …
The basic element of a quantum computing system is a quantum bit, often called a qubit …
Determining interface dielectric losses in superconducting coplanar-waveguide resonators
Superconducting quantum-computing architectures comprise resonators and qubits that
experience energy loss due to two-level systems (TLSs) in bulk and interfacial dielectrics. An …
experience energy loss due to two-level systems (TLSs) in bulk and interfacial dielectrics. An …
The superconducting quasicharge qubit
The non-dissipative nonlinearity of Josephson junctions converts macroscopic
superconducting circuits into artificial atoms, enabling some of the best-controlled qubits …
superconducting circuits into artificial atoms, enabling some of the best-controlled qubits …
[HTML][HTML] Analysis and mitigation of interface losses in trenched superconducting coplanar waveguide resonators
Improving the performance of superconducting qubits and resonators generally results from
a combination of materials and fabrication process improvements and design modifications …
a combination of materials and fabrication process improvements and design modifications …
Precision measurement of the microwave dielectric loss of sapphire in the quantum regime with parts-per-billion sensitivity
Dielectric loss is known to limit state-of-the-art superconducting qubit lifetimes. Recent
experiments imply upper bounds on bulk dielectric loss tangents on the order of 100 parts …
experiments imply upper bounds on bulk dielectric loss tangents on the order of 100 parts …
Superconducting microwave cavities and qubits for quantum information systems
Superconducting microwave cavities featuring ultrahigh Q-factors, which measure the
efficiency of energy storage in relation to energy loss in a system, are revolutionizing …
efficiency of energy storage in relation to energy loss in a system, are revolutionizing …