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Related Concept Videos

Quantum Numbers02:43

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
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A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
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Related Experiment Video

Updated: Feb 7, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Scalable Generation of Multi-mode NOON States for Quantum Multiple-phase Estimation.

Lu Zhang1, Kam Wai Clifford Chan2

  • 1School of Electrical and Computer Engineering, University of Oklahoma-Tulsa, Tulsa, Oklahoma, 74135, USA. lu@ou.edu.

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Researchers developed four methods to create multi-mode NOON states for enhanced quantum measurements. The most feasible method uses linear optics and Fock state filtration, requiring fewer operations and no high-N Fock states or nonlinearity.

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Metrology

Background:

  • Multi-mode NOON states are crucial for achieving supersensitive and superresolved measurements.
  • These states enable simultaneous estimation of multiple phases, advancing precision measurement techniques.

Purpose of the Study:

  • To propose and compare four distinct methods for generating high-photon-number multi-mode NOON states.
  • To evaluate the feasibility and efficiency of each proposed generation technique.

Main Methods:

  • Method 1: Linear optical approach using Fock state filtration on coherent states, combined with multi-fold single-photon coincidence detections (SPCD) and postselection.
  • Methods 2 & 3: Linear and nonlinear approaches utilizing N-photon Fock states as inputs, requiring only SPCD triggering.
  • Method 4: A second linear approach using N-photon Fock states, also requiring SPCD triggering.

Main Results:

  • All four proposed methods can theoretically generate multi-mode NOON states with arbitrary photon numbers.
  • The first linear optical method is identified as the most experimentally feasible.
  • This preferred method requires fewer photonic operations and avoids the need for high-N Fock states or high nonlinearity.

Conclusions:

  • The study presents viable pathways for generating advanced quantum states for metrology.
  • The proposed linear optical method offers a practical and efficient route for experimental realization of multi-mode NOON states.
  • These advancements pave the way for improved quantum-enhanced sensing and measurement technologies.