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Van der Waals Interactions01:24

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Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Coherent Interactions between Silicon-Vacancy Centers in Diamond.

Matthew W Day1, Kelsey M Bates1, Christopher L Smallwood1,2

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This summary is machine-generated.

We demonstrate tunable dipole-dipole interactions between silicon-vacancy color centers in diamond. These interactions enable manipulation of collective states, crucial for quantum technologies.

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Materials science

Background:

  • Silicon-vacancy (SiV) color centers in diamond are promising qubits.
  • Controlling interactions between color centers is key for quantum information processing.
  • Collective states of quantum emitters are essential for advanced applications.

Purpose of the Study:

  • To investigate tunable excitation-induced dipole-dipole interactions between SiV color centers.
  • To explore the coupling of SiV centers into collective states.
  • To demonstrate a method for manipulating these collective states.

Main Methods:

  • Experiments conducted at cryogenic temperatures.
  • Utilized tunable optical excitation pulses.
  • Characterized spectrally resolved interaction-induced signals, analyzing phase and amplitude.
  • Observed oscillations in interaction strength and population states.

Main Results:

  • Achieved tunable excitation-induced dipole-dipole interactions between SiV centers.
  • Demonstrated coupling of SiV centers into collective states.
  • Observed excitation-induced shifts that distinguish collective state excitation levels.
  • Showcased oscillations in interaction strength and collective state population with excitation pulse area.

Conclusions:

  • Excitation-induced dipole-dipole interactions offer a method for controlling collective intercenter states.
  • This approach is effective even in congested, inhomogeneous ensembles of color centers.
  • Provides a pathway for advanced quantum manipulation using SiV centers in diamond.