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Non-gated Ion Channels01:24

Non-gated Ion Channels

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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.
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Mechanically-gated Ion Channels01:12

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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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Ligand-gated Ion Channels01:19

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Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
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Voltage-gated Ion Channels01:26

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Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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G-Protein Gated Ion Channels01:21

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
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Robust Entanglement Gates for Trapped-Ion Qubits.

Yotam Shapira1, Ravid Shaniv1, Tom Manovitz1

  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel.

Physical Review Letters
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Summary
This summary is machine-generated.

Researchers developed robust two-qubit entangling gates for quantum computing. These novel multitone-drive gates overcome noise and control errors, enhancing quantum information processing reliability.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • High-fidelity two-qubit entangling gates are crucial for quantum computation.
  • Existing gates on trapped-ion qubits can suffer from reduced fidelity due to control errors and noise.

Purpose of the Study:

  • To propose and demonstrate a new family of two-qubit entangling gates.
  • To enhance robustness against various noise sources and control errors in quantum operations.

Main Methods:

  • Generalizing the Mølmer-Sørensen gate using multitone drives.
  • Experimental implementation on strontium-88 (Sr+) ions in a linear Paul trap.
  • Verification of gate resilience to noise and errors.

Main Results:

  • Demonstration of a novel class of robust two-qubit entangling gates.
  • Experimental validation of the proposed gates' resilience.
  • Successful implementation on trapped Sr+ ions.

Conclusions:

  • The developed multitone-drive gates offer improved fidelity and robustness for quantum information processing.
  • This work provides a promising pathway for building more reliable universal quantum computers.
  • The proposed gates represent a significant advancement in trapped-ion quantum computing.