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Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
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Setting Limits on Supersymmetry Using Simplified Models
07:46

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Published on: November 15, 2013

Coherent state evolution in a superconducting qubit from partial-collapse measurement.

N Katz1, M Ansmann, Radoslaw C Bialczak

  • 1Department of Physics and California NanoSystems Institute, University of California, Santa Barbara, CA 93106, USA.

Science (New York, N.Y.)
|June 10, 2006
PubMed
Summary
This summary is machine-generated.

Partial quantum measurement in superconducting qubits reveals two outcomes: full state collapse or coherent nonunitary evolution. This confirms quantum measurement theory and aids quantum error correction.

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Area of Science:

  • Quantum Information Science
  • Superconducting Quantum Computing
  • Quantum Measurement Theory

Background:

  • Measurement is crucial for quantum information processing.
  • Partial measurement offers a deeper probe into quantum measurement processes.
  • Superconducting qubits are a leading platform for quantum computation.

Purpose of the Study:

  • To perform quantum-state tomography on a superconducting qubit using partial measurement.
  • To investigate the probabilistic outcomes of partial quantum measurements.
  • To validate modern quantum measurement theory and explore applications in quantum error correction.

Main Methods:

  • Implementation of quantum-state tomography.
  • Utilizing high-fidelity single-shot measurements in a superconducting qubit.
  • Analysis of probabilistic outcomes following partial quantum measurements.

Main Results:

  • Observed two distinct probabilistic outcomes for partial measurements.
  • Demonstrated either complete wavefunction collapse or a coherent, nonunitary state evolution.
  • Provided experimental confirmation of theoretical predictions in quantum measurement.

Conclusions:

  • Partial measurements offer a nuanced view beyond simple wavefunction collapse.
  • The observed coherent nonunitary evolution validates advanced quantum measurement theories.
  • Findings have potential implications for developing robust quantum error-correction algorithms.