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Related Concept Videos

Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

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An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque...
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Mechanical Systems01:22

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Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
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The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
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Related Experiment Video

Updated: Apr 3, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Optomechanical entanglement under pulse drive.

Qing Lin, Bing He

    Optics Express
    |September 26, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study explores optomechanical entanglement using pulsed lasers, developing a new approach for non-steady states. Entanglement evolution, even at high temperatures, is analyzed.

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    Area of Science:

    • Quantum optics
    • Optomechanics
    • Quantum information science

    Background:

    • Optomechanical systems couple mechanical motion to light.
    • Entanglement is crucial for quantum technologies.
    • Pulsed laser driving presents unique challenges due to non-steady states.

    Purpose of the Study:

    • Investigate optomechanical entanglement dynamics under pulsed laser excitation.
    • Develop a novel theoretical framework for pulsed optomechanical systems.
    • Analyze entanglement evolution under varying detuning and pulse shapes, including high-temperature effects.

    Main Methods:

    • Theoretical modeling of optomechanical entanglement.
    • Analysis of system evolution under arbitrary pulsed laser drive (detuning, pulse shape).
    • Adaptation of standard entanglement treatment for non-steady-state conditions.

    Main Results:

    • Demonstration of optomechanical entanglement generation using pulsed lasers.
    • Characterization of entanglement dynamics influenced by pulse parameters.
    • Insights into high-temperature effects on entanglement evolution.

    Conclusions:

    • Pulsed laser driving offers a viable route to optomechanical entanglement.
    • The developed approach effectively handles non-steady-state dynamics.
    • Understanding high-temperature behavior is essential for practical applications.