artificial atom


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artificial atom

[‚ärd·ə‚fish·əl ′ad·əm]
(electronics)
A structure, typically 50-100 nanometers in diameter, that is fabricated in a semiconductor crystal and holds a small number of electrons which are trapped in a bowllike potential well.
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TEHRAN (FNA)- Researchers succeeded in an experiment where they get an artificial atom to survive ten times longer than normal by positioning the atom in front of a mirror.
Rajamani Vijayaraghavan - Thesis Summary: Slichter describes a method for the real time monitoring of quantum states, accomplished by coupling a superconducting artificial atom to a microwave cavity.
Subsequently, billions of atoms in the nanometer thick conductors behave like a single artificial atom -- which can then become the quantum bit, or qubit, used in a computer.
He explained that in this work they operated a quantum circuit as a more complicated artificial atom with up to five energy levels.
Tokyo, Japan, Oct 4, 2007 - (JCN Newswire) - RIKEN, NEC Corporation, and JST ("Japan Science and Technology Agency") have successfully demonstrated a laser emission from one artificial atom by coupling superconducting quantum bits ("qubits") to a resonator.
Horst Stormer, Ashoori's co-worker at AT&T, added: "You can make any kind of artificial atom - long, thin atoms and big, round atoms.
Namely, we plan to exploit the potential of cavity quantum electrodynamics in the bad emitter limit where decoherence is mostly due to the artificial atom.
The achievement is described in a paper, "Direct Observation of Coherent Population Trapping in a Superconducting Artificial Atom," that was recently published in Physical Review Letters.
Moreover, this artificial atom without a nucleus, as Gerald Gabrielse and his colleagues refer to their diminutive apparatus, promises to make possible the most precise measurements yet of certain fundamental constants.
One can consider the artificial atom as a tiny laboratory in which quantum mechanics and the effects of electron-electron interactions can be studied," says Raymond C.
Ashoori described the fabrication of an artificial atom and the result of adding electrons to it one by one this week in Boston at a meeting of the American Association for the Advancement of Science.
In this project in quantum-mechanical engineering with superconducting qubits electronic circuits that are engineered artificial atoms I will create quantum-entangled steady states that never decay, as long as the qubits are subject to external microwave drive fields.