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Updated: May 19, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Classical to quantum in large-number limit.

Kavan Modi1, Rosario Fazio, Saverio Pascazio

  • 1Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK. kavan@quantumlah.org

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|September 5, 2012
PubMed
Summary
This summary is machine-generated.

This study reformulates a quantumness witness for quantum states, finding system purity is key. Multiple systems reveal quantumness, challenging classical intuition, but require significant resources for detection.

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Last Updated: May 19, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Area of Science:

  • Quantum Information Science
  • Quantum Foundations

Background:

  • The Alicki & van Ryn (AvR) test detects quantumness via observables.
  • Reformulating the test for quantum states offers new insights into quantum detection.

Purpose of the Study:

  • To reformulate the AvR quantumness witness for quantum states.
  • To identify essential quantities and resources for detecting quantumness.
  • To investigate the witness's behavior with mixed states and multiple systems.

Main Methods:

  • Reformulation of the AvR quantumness witness for quantum states.
  • Analysis of system purity as a key detection quantity.
  • Examination of multi-system scenarios and resource requirements.

Main Results:

  • System purity is identified as a critical factor for detecting quantumness.
  • The witness fails to detect quantumness in moderately mixed systems.
  • Quantumness is revealed in multi-system scenarios, contrary to classical expectations.
  • Resource demands for detection increase substantially with the number of systems.

Conclusions:

  • The reformulated witness highlights the importance of system purity.
  • Multi-system analysis reveals quantumness in mixed states, challenging classical limits.
  • The study provides insights into detecting quantumness in systems like nuclear magnetic resonance (NMR).