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Hybridization of Atomic Orbitals I03:24

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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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Related Experiment Video

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Entanglement of atomic qubits using an optical frequency comb.

D Hayes1, D N Matsukevich, P Maunz

  • 1Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA. dhayes12@umd.edu

Physical Review Letters
|May 21, 2010
PubMed
Summary

We use optical frequency combs to control and entangle atomic qubits. This method efficiently transfers population between states and implements high-fidelity quantum logic gates for trapped ions.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Laser Spectroscopy

Background:

  • Coherent control of quantum systems is crucial for quantum computing.
  • Atomic qubits offer long coherence times and precise manipulation.
  • Optical frequency combs provide precise control over quantum states.

Purpose of the Study:

  • To demonstrate the use of optical frequency combs for coherent control of atomic qubits.
  • To implement an entangling quantum logic gate using ultrafast laser pulses.
  • To explore the potential for faster quantum operations in a high field regime.

Main Methods:

  • Utilizing a train of off-resonant ultrafast laser pulses from an optical frequency comb.
  • Coherently transferring population between electronic and vibrational states of trapped atomic ions.
  • Implementing a two-qubit entangling gate operation.

Main Results:

  • Achieved efficient and coherent population transfer.
  • Demonstrated high-fidelity implementation of an entangling quantum logic gate.
  • Showcased the potential for operations faster than the trap frequency.

Conclusions:

  • Optical frequency combs enable precise coherent control and entanglement of atomic qubits.
  • The demonstrated technique is versatile and applicable to more complex quantum systems.
  • This approach paves the way for advanced quantum information processing with trapped ions.