Manipulating the Quantum State of an Electrical Circuit

By D. Vion, A. Aassime, A. Cottet, P. Joyez, H. Pothier, C. Urbina, D. Estève, Michel H. Devoret. Science, 2002

1,293 citations recorded by the source corpus.

We have designed and operated a superconducting tunnel junction circuit that behaves as a two-level atom: the “quantronium.” An arbitrary evolution of its quantum state can be programmed with a series of microwave pulses, and a projective measurement of the state can be performed by a pulsed readout subcircuit. The measured quality factor of quantum coherenceQ ϕ ≅ 25,000 is sufficiently high that a solid-state quantum processor based on this type of circuit can be envisioned.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/1ed68319d4ac6d812bad868645e879d179657c68

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum technology: the second quantum revolution (2002, background): “In a more recent experiment (Vion et al. 2002), the actual quantum degree of freedom used was a hybrid mix of charge and phase.”
Quantum information processing and quantum optics with circuit quantum electrodynamics (2020, background): “However, quantum coherence is not limited to natural atoms, and the first conclusive signatures of a coherent superposition of two states in an engineered quantum system were observed two decades ago via the atomic physics techniques of Rabi oscillations 3 and Ramsey interference fringes 4,5 .”
Quantum information processing with superconducting circuits: a review (2016, background): “The transmon [25] is a devel opment of the CPB toward a circuit with low sensitiv ity to charge noise, and therefore much longer coherence times.”
Superconducting nanocircuits for topologically protected qubits (2008, background): “The existence of such a “sweet spot” in the qubit parameters space, where the qubit is decoupled from noise in linear order, has been already established for superconducting qubits [7,8,9,10].”