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Scalable solid-state qubits: challenging decoherence and read-out.

Göran Wendin1

  • 1Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, 41296 Göteborg, Sweden.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|July 19, 2003
PubMed
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This review covers fundamental quantum bits (qubits) and processing, focusing on superconducting qubits. It explores various qubit designs and discusses multi-qubit systems and decoherence challenges in quantum computing.

Area of Science:

  • Quantum Computing
  • Solid-State Physics
  • Circuit Quantum Electrodynamics

Background:

  • Qubits are fundamental units of quantum information.
  • Solid-state qubits are promising candidates for quantum computation.

Purpose of the Study:

  • To review basic facts about qubits and qubit processing.
  • To focus on quantized electrical circuits and superconducting qubits.
  • To explore various superconducting qubit designs and multi-qubit systems.

Main Methods:

  • Survey of solid-state qubits.
  • Focus on quantized electrical circuits and Josephson junction-based superconducting qubits.
  • Review of general framework for qubit design parameters.

Main Results:

Related Experiment Videos

  • Identified various superconducting qubits (Cooper pair box, persistent current, hybrid charge-phase, Andreev-level) arising from different design parameters.
  • Consideration of multi-qubit systems.
  • Discussion of decoherence in quantum systems.

Conclusions:

  • Superconducting qubits based on Josephson junctions offer a versatile platform for quantum information processing.
  • Understanding design parameters is key to realizing different qubit types.
  • Decoherence remains a critical challenge for multi-qubit systems.