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Charge-insensitive qubit design derived from the Cooper pair box
Short dephasing times pose one of the main challenges in realizing a quantum computer. Different approaches have been devised to cure this problem for superconducting qubits, a prime example being…
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Single Charge Tunneling: Coulomb Blockade Phenomena in Nanostructures
Introduction to Single Charge Tunneling M.H. Devoret, H. Grabert. Charge Tunneling Rates in Ultrasmall Junctions G.L. Ingold, Yu V. Nazarov. Transferring Electrons One by One D. Esteve. Josephson…
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Introduction to quantum noise, measurement, and amplification
The topic of quantum noise has become extremely timely due to the rise of quantum information physics and the resulting interchange of ideas between the condensed matter and atomic, molecular,…
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Single Charge Tunneling
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Superconducting Circuits for Quantum Information: An Outlook
TLDR
For the first time, physicists will have to master quantum error correction to design and operate complex active systems that are dissipative in nature, yet remain coherent indefinitely.
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Quantum Fluctuations in Electrical Circuits
Manipulating the Quantum State of an Electrical Circuit
TLDR
A superconducting tunnel junction circuit that behaves as a two-level atom that can be programmed with a series of microwave pulses and a projective measurement of the state can be performed by a pulsed readout subcircuit is designed and operated.
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Individual single-wall carbon nanotubes as quantum wires
Carbon nanotubes have been regarded since their discovery1 as potential molecular quantum wires. In the case of multi-wall nanotubes, where many tubes are arranged in a coaxial fashion, the…
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Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture.
TLDR
A new architecture for superconducting quantum circuits employing a three-dimensional resonator that suppresses qubit decoherence while maintaining sufficient coupling to the control signal is introduced, demonstrating that Josephson junction qubits are highly coherent.
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Coupling superconducting qubits via a cavity bus
TLDR
These experiments show that two nearby qubits can be readily coupled with local interactions, and show the implementation of a quantum bus, using microwave photons confined in a transmission line cavity, to couple two superconducting qubits on opposite sides of a chip.
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