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Related Concept Videos

Reducing Line Loss01:18

Reducing Line Loss

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
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The Squeeze Theorem01:30

The Squeeze Theorem

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Certain mathematical functions exhibit unpredictable or highly variable behavior near specific input values, making direct evaluation of their limits challenging. This complexity may arise from rapid oscillations or irregular patterns that obscure the function’s trend. In such cases, the Squeeze Theorem offers a reliable method for determining limits.According to the Squeeze Theorem, if a function is confined between two other functions near a particular point, and both outer functions...
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Boundary Conditions: Lossless Lines01:21

Boundary Conditions: Lossless Lines

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Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
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Pinching-off of Coated Vesicles01:32

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Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

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As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
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Lossy Lines and Overvoltages01:22

Lossy Lines and Overvoltages

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Transmission-line series resistance and shunt conductance cause three primary effects: attenuation, distortion, and power losses.
Attenuation
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Quasi-light Storage for Optical Data Packets
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Loss-tolerant cross-Kerr enhancement via modulated squeezing.

Ankit Tiwari, Daniel Burgarth, Linran Fan

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    Summary

    We developed new squeezing protocols to boost cross-Kerr interactions for quantum computing. These methods amplify interaction strength, enabling faster controlled phase gates and overcoming photon loss challenges.

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    Area of Science:

    • Quantum optics
    • Quantum information science
    • Photonic quantum computing

    Background:

    • Cross-Kerr interactions are crucial for photonic quantum computing.
    • Enhancing these interactions is key to improving gate speeds and reducing errors.
    • Current methods face limitations in efficiency and scalability.

    Purpose of the Study:

    • To develop novel squeezing protocols for enhancing cross-Kerr interactions.
    • To apply these protocols to accelerate the implementation of controlled phase gates.
    • To analyze the performance of these protocols concerning gate error and photon loss.

    Main Methods:

    • Alternating squeezing along different quadratures of a single photonic mode.
    • Developing theoretical bounds for squeezing strength and speed required for specific gate errors.
    • Investigating the resilience of protocols against photon loss.

    Main Results:

    • Generic amplification of cross-Kerr interaction strength demonstrated.
    • Established bounds for achieving desired gate fidelity with single-mode squeezing.
    • Protocols shown to be robust against photon loss.

    Conclusions:

    • Squeezing protocols offer a viable route to enhance cross-Kerr interactions.
    • Accelerated deterministic implementation of controlled phase gates is achievable.
    • Experimental realization in optical fibers and nanophotonic waveguides is feasible.