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Related Concept Videos

Non-gated Ion Channels01:24

Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
Non-gated Ion Channels01:24

Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Microwave quantum logic gates for trapped ions.

C Ospelkaus1, U Warring, Y Colombe

  • 1Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA. christian.ospelkaus@iqo.uni-hannover.de

Nature
|August 12, 2011
PubMed
Summary
This summary is machine-generated.

Researchers achieved precise quantum control of trapped ions using integrated microfabricated traps. This breakthrough enables scalable quantum information processing and simulation by manipulating atomic states with high fidelity.

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Area of Science:

  • Quantum physics
  • Atomic physics
  • Nanotechnology

Background:

  • Coherent manipulation of quantum systems is crucial for quantum technologies.
  • Trapped atomic ions offer a promising platform for quantum control.
  • Traditional methods using radio-frequency or microwave radiation face limitations in achieving precise control due to field gradients.

Purpose of the Study:

  • To demonstrate coherent manipulation of internal quantum states of trapped ions.
  • To generate entanglement between two trapped ions using a scalable quantum gate operation.
  • To explore the application of near-field microwave control in microfabricated traps.

Main Methods:

  • Utilized microfabricated ion traps with integrated electrodes for generating near-field microwave currents.
  • Implemented rapid (20 nanosecond timescale) coherent manipulation of ion internal states.
  • Performed a two-qubit gate operation to entangle the internal degrees of freedom of two ions.

Main Results:

  • Successfully manipulated the quantum states of trapped ions with high precision.
  • Achieved entanglement between two ions with a fidelity of 0.76(3).
  • Demonstrated the scalability of integrating quantum control mechanisms into trapping devices.

Conclusions:

  • The developed approach enables scalable and precise quantum control of trapped ions.
  • This method is suitable for applications in quantum information processing, quantum simulation, and high-resolution spectroscopy.
  • Integrating control electronics into the trap structure overcomes limitations of traditional methods.