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Related Experiment Video

Updated: May 18, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Symmetry-protected phases for measurement-based quantum computation.

Dominic V Else1, Ilai Schwarz, Stephen D Bartlett

  • 1Centre for Engineered Quantum Systems, School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.

Physical Review Letters
|September 26, 2012
PubMed
Summary
This summary is machine-generated.

Ground states in quantum spin lattices are key for quantum computation. Symmetry-protected topological orders ensure perfect identity gates, making quantum gates robust against variations.

Related Experiment Videos

Last Updated: May 18, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Area of Science:

  • Quantum Information Science
  • Condensed Matter Physics
  • Quantum Computation

Background:

  • Ground states of spin lattices are essential resources for measurement-based quantum computation.
  • Quantum gates performed via measurements ideally should be insensitive to Hamiltonian variations.

Purpose of the Study:

  • To describe a class of symmetry-protected topological orders in one-dimensional systems.
  • To demonstrate how these orders ensure the perfect operation of the identity gate.

Main Methods:

  • Investigated one-dimensional spin lattice systems.
  • Analyzed symmetry-protected topological orders.
  • Characterized the properties of ground states related to quantum gates.

Main Results:

  • Identified a class of symmetry-protected topological orders.
  • Showed that these orders guarantee the perfect operation of the identity gate.
  • Established that measurement-based quantum gates can be a robust property of an entire phase.

Conclusions:

  • Symmetry-protected topological orders offer a pathway to robust quantum gates.
  • The identity gate operation is perfectly realized in these specific topological phases.
  • This robustness is a consequence of the underlying symmetry protection.