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Related Concept Videos

Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
MOSFET01:16

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
Control of Power Flow01:30

Control of Power Flow

There are several methods to control power flow in power systems:

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Published on: April 12, 2018

Electrical control of a solid-state flying qubit.

Michihisa Yamamoto1, Shintaro Takada, Christopher Bäuerle

  • 1Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan. yamamoto@ap.t.u-tokyo.ac.jp

Nature Nanotechnology
|March 20, 2012
PubMed
Summary

Researchers demonstrate scalable flying qubit architectures in solid-state systems. This breakthrough enables quantum operations during coherent qubit transfer, advancing quantum computing scalability.

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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Quantum Computing

Background:

  • Scalable quantum information technology relies on solid-state approaches.
  • Coherent quantum information transport is crucial for quantum computing.
  • Existing methods lack scalable 'flying qubit' architectures for simultaneous transport and manipulation.

Purpose of the Study:

  • To demonstrate a scalable flying qubit architecture in a solid-state system.
  • To enable quantum operations during coherent qubit transfer.
  • To advance integration and scaling in quantum computing.

Main Methods:

  • Transport and manipulation of qubits over 6 µm distances within 40 ps.
  • Utilized an Aharonov-Bohm ring with two-channel wires and tunable tunnel coupling.
  • Defined flying qubit state by electron presence in either wire channel, controlled without a magnetic field.

Main Results:

  • Achieved qubit transport and manipulation in a solid-state flying qubit architecture.
  • Demonstrated shorter quantum gates (<1 µm) and longer coherence lengths (∼86 µm at 70 mK).
  • Reported higher operating frequencies (∼100 GHz) compared to other solid-state flying qubit implementations.

Conclusions:

  • The developed device represents a significant step towards scalable quantum computing.
  • This architecture facilitates control over qubit separation and non-local entanglement.
  • The findings pave the way for more integrated and scalable quantum information technologies.