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Related Concept Videos

Underflow Gates01:30

Underflow Gates

Underflow gates are vital for controlling water flow in irrigation canals. The three main types of underflow gates — vertical, radial, and drum gates — serve different purposes while ensuring effective flow management. Vertical gates move up and down, generating a free-flowing water jet; radial gates pivot to regulate the flow; and drum gates rotate for precise adjustments. The flow through these gates is influenced by downstream conditions, resulting in free or drowned outflow.Free and Drowned...
Escape Velocities of Gases01:19

Escape Velocities of Gases

To escape the Earth's gravity, an object near the top of the atmosphere at an altitude of 100 km must travel away from Earth at 11.1 km/s. This speed is called the escape velocity. The temperature at which gas molecules attain the rms speed, which is equal to the escape velocity, can be estimated by using the equation for the average kinetic energy of the gas molecules. According to the kinetic theory of gas, the average kinetic energy of the gas molecules is proportional to its temperature.
Design Example: Forces in Sluice Gate01:11

Design Example: Forces in Sluice Gate

In hydraulic engineering, sluice gates are essential for managing water flow through channels, reservoirs, and irrigation systems. Sluice gates, acting as vertical barriers, regulate water by adjusting the gate's opening height, which changes the velocity and pressure of water flowing beneath the gate. Understanding the forces involved is crucial to designing sluice gates that can withstand dynamic pressure differences, especially when the gate is closed or partially open.
Key variables in...
Adiabatic Processes for an Ideal Gas01:18

Adiabatic Processes for an Ideal Gas

When an ideal gas is compressed adiabatically, that is, without adding heat, work is done on it, and its temperature increases. In an adiabatic expansion, the gas does work, and its temperature drops. Adiabatic compressions actually occur in the cylinders of a car, where the compressions of the gas-air mixture take place so quickly that there is no time for the mixture to exchange heat with its environment. Nevertheless, because work is done on the mixture during the compression, its...
Hyperbolic and Inverse Hyperbolic Functions: Problem Solving01:30

Hyperbolic and Inverse Hyperbolic Functions: Problem Solving

An arched gate can be effectively modeled using a hyperbolic cosine profile because this type of function is smooth and symmetric about the vertical axis. When the arch is centered at the origin, its maximum height occurs at the center point. This symmetry ensures that any height below the crown of the arch is reached at two horizontal positions that are equal in distance from the centerline but lie on opposite sides.To determine where the gate reaches a height of five meters, the height of the...
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...

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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
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Published on: November 1, 2013

Adiabatic gate teleportation.

Dave Bacon1, Steven T Flammia

  • 1Department of Computer Science and Engineering, University of Washington, Seattle, Washington 98195, USA.

Physical Review Letters
|October 2, 2009
PubMed
Summary
This summary is machine-generated.

We developed adiabatic gate teleportation, a robust quantum computing primitive resistant to timing and control errors. This method ensures a constant energy gap, enhancing quantum computation reliability.

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Area of Science:

  • Quantum Computing
  • Quantum Information Science
  • Error Correction in Quantum Systems

Background:

  • Quantum gate operations are prone to timing and control errors, limiting quantum computer performance.
  • Developing robust quantum gates is crucial for building reliable quantum computers.
  • Existing methods often struggle with precise control and maintaining coherence.

Purpose of the Study:

  • To introduce a novel, error-resilient primitive for quantum gate implementation.
  • To enhance the robustness of quantum computations against common physical errors.
  • To provide a method that is compatible with existing quantum computing frameworks.

Main Methods:

  • Introduction of adiabatic gate teleportation, a universal quantum gate primitive.
  • Utilizing a constant energy gap above a degenerate ground state space.
  • Employing geometric robustness through control of two independent qubit interactions.
  • Implementing piecewise adiabatic evolution for circuit model compatibility.

Main Results:

  • Demonstrated robustness to timing errors and many control errors.
  • Maintained a constant energy gap throughout the computation.
  • Achieved geometric robustness via controlled qubit interactions.
  • Established a clear link to the quantum circuit model.

Conclusions:

  • Adiabatic gate teleportation offers a promising solution for reducing errors in quantum computing.
  • The method's robustness and compatibility facilitate the application of fault-tolerance theory.
  • This primitive is a significant step towards building scalable and reliable quantum computers.