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Related Concept Videos

Symmetric Member in Bending01:07

Symmetric Member in Bending

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In the study of the mechanics of materials, analyzing the behavior of prismatic members under opposing couples is crucial for understanding internal stress distributions, which are essential for structural design. When subjected to couples, a prismatic member experiences internal forces that maintain equilibrium. A couple, characterized by two equal and opposite forces, creates a moment but no resultant force. The internal forces at any section cut of the member must balance these external...
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Switching of BJT01:22

Switching of BJT

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Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
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Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

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When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
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Beams with Symmetric Loadings01:15

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The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
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Gravitation Between Spherically Symmetric Masses01:14

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The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
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Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
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Related Experiment Video

Updated: Jan 30, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Tailoring PT-symmetric soliton switch.

A Govindarajan, Amarendra K Sarma, M Lakshmanan

    Optics Letters
    |February 1, 2019
    PubMed
    Summary

    We demonstrate soliton steering in parity-time (PT)-symmetric systems. Optimized PT dimers achieve near-perfect energy efficiency for soliton switching at ultralow critical power.

    Area of Science:

    • Nonlinear optics
    • Quantum physics
    • Photonics

    Background:

    • Parity-time (PT)-symmetric systems offer unique control over light propagation.
    • Soliton switching is crucial for optical communications and signal processing.
    • Conventional systems require precise tuning to the half-beat coupling length for efficient operation.

    Purpose of the Study:

    • To theoretically demonstrate efficient soliton steering in PT-symmetric coupled nonlinear dimers.
    • To investigate the performance of PT-symmetric systems optimized for soliton switching.
    • To explore the potential for ultralow critical power operation.

    Main Methods:

    • Theoretical modeling of nonlinear light propagation in PT-symmetric dimers.
    • Analysis of soliton dynamics and energy transfer.

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  • Numerical simulations to validate theoretical predictions.

    • Main Results:

    • Soliton steering is achieved in PT-symmetric coupled nonlinear dimers.
    • An ideal soliton switch with 99.99% energy efficiency is demonstrated.
    • Operation is achieved at a specific system length (2π), independent of the half-beat coupling length.
    • Ultralow critical power is required for efficient switching.

    Conclusions:

    • PT-symmetric dimers provide a robust platform for high-efficiency soliton switching.
    • The proposed system overcomes limitations of conventional approaches.
    • This work paves the way for advanced optical devices with enhanced performance.