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Related Concept Videos

Alkali Metals03:06

Alkali Metals

Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
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...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Electronic Structure of Atoms02:28

Electronic Structure of Atoms


An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum numbers:  n, l, ml, and...

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Quantum computing with alkaline-Earth-metal atoms.

Andrew J Daley1, Martin M Boyd, Jun Ye

  • 1California Institute of Technology, Pasadena, CA 91125, USA.

Physical Review Letters
|November 13, 2008
PubMed
Summary
This summary is machine-generated.

This study details a quantum information processing scheme using alkaline-earth-metal atoms. It enables qubit storage, transport, and gate operations using independent optical lattices and novel addressing and gate mechanisms.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • Alkaline-earth-metal atoms offer unique electronic structures suitable for quantum information processing.
  • Previous schemes often face limitations in qubit control and scalability.

Purpose of the Study:

  • To present a comprehensive scheme for quantum information processing using alkaline-earth-metal atoms.
  • To leverage specific atomic states and lattice configurations for robust qubit manipulation.

Main Methods:

  • Utilizing two independent optical lattices for distinct atomic states (1S0 and 3P0).
  • Encoding qubits on nuclear spins for storage and utilizing transport lattices for operations.
  • Employing the 3P2 level for individual qubit addressing.
  • Implementing a lossy blockade mechanism for gate operations via collisional losses.

Main Results:

  • Demonstration of independent storage and transport lattices for nuclear spin qubits.
  • Proposal for individual qubit addressing using the 3P2 atomic level.
  • Viability of a lossy blockade mechanism for quantum gate implementation.

Conclusions:

  • The proposed scheme provides a complete framework for quantum information processing with alkaline-earth-metal atoms.
  • The method offers precise control over qubits, paving the way for advanced quantum computing architectures.
  • This approach addresses key challenges in scalability and gate fidelity.