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Related Concept Videos

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
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The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
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Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Collective quantum jumps of Rydberg atoms.

Tony E Lee1, H Häffner, M C Cross

  • 1Department of Physics, California Institute of Technology, Pasadena, California 91125, USA.

Physical Review Letters
|February 14, 2012
PubMed
Summary
This summary is machine-generated.

This study reveals how collective entanglement and quantum measurement in large atom systems enable classically forbidden jumps between low and high Rydberg states, crucial for understanding open quantum systems.

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Area of Science:

  • Quantum physics
  • Atomic physics
  • Quantum optics

Background:

  • Open quantum systems exhibit complex dynamics.
  • Rydberg interactions and spontaneous emission are key factors in atomic system evolution.
  • Collective phenomena in quantum systems are not fully understood.

Purpose of the Study:

  • To investigate the mechanism behind discrete, collective jumps in an open quantum system of atoms.
  • To explain the role of entanglement and quantum measurement in these jumps.
  • To elucidate phenomena that are forbidden by classical physics.

Main Methods:

  • Theoretical modeling of an open quantum system.
  • Analysis of systems with long-range Rydberg interactions and laser driving.
  • Incorporation of spontaneous emission effects.

Main Results:

  • Observed occasional, discrete jumps between low and high Rydberg population states.
  • Demonstrated that these jumps are collective phenomena, requiring a large number of atoms.
  • Identified entanglement and quantum measurement as enabling mechanisms for these jumps.

Conclusions:

  • Entanglement and quantum measurement are essential for classically forbidden collective jumps in Rydberg atom systems.
  • The study provides insights into the fundamental nature of quantum measurement and collective behavior.
  • Understanding these jumps is vital for advancing quantum information processing and quantum simulation.