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Related Concept Videos

¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
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Atomic Emission Spectroscopy: Interference01:30

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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

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¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
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Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule01:10

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Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Two-photon quantum interference from separate nitrogen vacancy centers in diamond.

Hannes Bernien1, Lilian Childress, Lucio Robledo

  • 1Kavli Institute of Nanoscience Delft, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands.

Physical Review Letters
|March 10, 2012
PubMed
Summary
This summary is machine-generated.

Researchers observed quantum interference between two nitrogen vacancy (NV) centers in diamond, achieving a 66% interference contrast. This breakthrough advances remote entanglement and solid-state quantum networks.

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Area of Science:

  • Quantum Optics
  • Solid-State Physics
  • Quantum Information Science

Background:

  • Nitrogen vacancy (NV) centers in diamond are promising solid-state qubits.
  • Quantum interference is a fundamental phenomenon for quantum information processing.

Purpose of the Study:

  • To demonstrate and characterize quantum interference between two distinct NV centers in diamond.
  • To explore methods for achieving resonance between dissimilar NV centers for enhanced interference.

Main Methods:

  • Utilizing optically induced spin polarization and polarization filtering to isolate single NV center transitions.
  • Employing time-resolved measurements to quantify interference contrast.
  • Leveraging the dc Stark effect to tune NV centers into resonance.

Main Results:

  • Observed quantum interference of emission from two separate NV centers.
  • Achieved a time-resolved two-photon interference contrast of 66% for filtered emission.
  • Demonstrated quantum interference between dissimilar NV centers tuned by the dc Stark effect.

Conclusions:

  • The results demonstrate a significant step towards measurement-based entanglement between remote NV centers.
  • This work paves the way for realizing quantum networks using solid-state spin qubits.
  • The demonstrated techniques are crucial for advancing quantum communication and computation.