Quantum computation and quantum information
Quantum computation and quantum information
Life after charge noise: recent results with transmon qubits
Quantum Information Processing
Quantum Information Processing
Evolution of entanglement of two qubits interacting through local and collective environments
Quantum Information & Computation
Controlling quantum information processing in hybrid systems on chips
Quantum Information Processing
Non-demolition dispersive measurement of a superconducting qubit with a microstrip SQUID amplifier
Quantum Information & Computation
Quantum state transfer with a two-dimensional Cooper-pair box qubit array
Quantum Information Processing
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Superconducting qubits are solid state electrical circuits fabricated using techniques borrowed from conventional integrated circuits. They are based on the Josephson tunnel junction, the only non-dissipative, strongly non-linear circuit element available at low temperature. In contrast to microscopic entities such as spins or atoms, they tend to be well coupled to other circuits, which make them appealling from the point of view of readout and gate implementation. Very recently, new designs of superconducting qubits based on multi-junction circuits have solved the problem of isolation from unwanted extrinsic electromagnetic perturbations. We discuss in this review how qubit decoherence is affected by the intrinsic noise of the junction and what can be done to improve it.