Related Experiment Video
Updated: Aug 3, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Quantum computation with cold bosonic atoms in an optical lattice
Juan José García-Ripoll1, Juan Ignacio Cirac
1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, Garching 85748, Germany.
Summary
Researchers demonstrate a universal set of quantum gates using bosonic atoms in an optical lattice. This method operates effectively even when atom numbers and tunneling rates are unknown, utilizing adiabatic passage for quantum computation.
Area of Science:
- Quantum computing
- Atomic physics
- Optical lattices
Background:
- Quantum computers leverage quantum phenomena for computation.
- Optical lattices provide a controllable environment for manipulating atoms.
Purpose of the Study:
- To analyze a quantum computer implementation using bosonic atoms in an optical lattice.
- To demonstrate a universal set of quantum gates via adiabatic passage.
Main Methods:
- Utilizing bosonic atoms confined in an optical lattice.
- Employing adiabatic passage techniques for gate operations.
Main Results:
- A universal set of quantum gates can be operated.
- Gate operation is independent of unknown atom numbers per site.
- Gate operation is independent of unknown tunneling rates.
Conclusions:
- Adiabatic passage offers a robust method for quantum gate implementation in optical lattices.
- This approach enables universal quantum computation even with imprecise system knowledge.
Related Concept Videos
02:32The de Broglie Wavelength
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
02:45The 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...
03:24Hybridization of Atomic Orbitals I
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...
03:35Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
01:11Atomic Nuclei: Larmor Precession Frequency
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...
01:27Atomic Spectroscopy: Effects of Temperature
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...