Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

4.8K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.8K
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

6.1K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
6.1K
BIBO stability of continuous and discrete -time systems01:24

BIBO stability of continuous and discrete -time systems

953
System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
953
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

1.7K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.7K
Continuous Charge Distributions01:17

Continuous Charge Distributions

8.5K
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
8.5K
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

820
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
820

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Activating bulk S/Se/Te positive electrodes by acidic binder-induced Cu corrosion for wide-temperature Na-Chalcogen batteries.

Nature communications·2026
Same author

Epstein-Barr virus-associated smooth muscle tumor of the lung in a child: a case report and literature review.

Frontiers in medicine·2026
Same author

A novel Bacillus aerolatus CX253 alleviates dextromethorphan-induced neurotoxicity via modulating the microbiota-gut-brain axis and hippocampal Apelin signaling pathway.

Brain, behavior, and immunity·2026
Same author

New Record of Pipefish from the Coast of Mainland China with Phylogeography and Conservation Insights.

Animals : an open access journal from MDPI·2026
Same author

Alisol B as a novel inhibitor of TβRs suppresses the growth and metastasis of non-small cell lung cancer by inhibiting TGF-β-induced epithelial-mesenchymal transition.

Phytomedicine : international journal of phytotherapy and phytopharmacology·2026
Same author

Prebiotic Potential of Whey Protein Conjugate/Anthocyanin Nanoparticles: in vitro Fermentation and Gut Microbiota Modulation.

Plant foods for human nutrition (Dordrecht, Netherlands)·2026

Related Experiment Video

Updated: Feb 21, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.0K

Adaptive-sign CMA for continuous-variable quantum key distribution under high-speed polarization disturbances.

Si Qiu, Yan Tian, Shaobo Ren

    Optics Express
    |February 20, 2026
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an adaptive-sign constant modulus algorithm (AS-CMA) to combat polarization disturbance in fiber optics. The new method ensures robust polarization recovery for quantum communications, even under extreme conditions.

    More Related Videos

    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
    09:23

    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

    Published on: May 30, 2014

    15.1K
    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
    14:18

    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

    Published on: February 28, 2016

    12.0K

    Related Experiment Videos

    Last Updated: Feb 21, 2026

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    9.0K
    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
    09:23

    Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

    Published on: May 30, 2014

    15.1K
    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
    14:18

    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

    Published on: February 28, 2016

    12.0K

    Area of Science:

    • Optics and Photonics
    • Quantum Information Science
    • Telecommunications Engineering

    Background:

    • Polarization fluctuations in long-distance single-mode fiber optic cables disrupt classical and quantum communication systems.
    • Maintaining signal integrity is crucial for secure data transmission, especially in quantum key distribution (QKD).

    Purpose of the Study:

    • To develop an efficient and low-complexity algorithm for polarization recovery in fiber optic systems.
    • To enhance the performance and resilience of continuous-variable quantum key distribution (CV-QKD) systems against polarization disturbances.

    Main Methods:

    • Proposing an adaptive-sign constant modulus algorithm (AS-CMA) with an error-driven adaptive step size.
    • Implementing a sign-based weight update mechanism to reduce computational complexity compared to conventional CMA.
    • Validating the AS-CMA algorithm within a simulated continuous-variable quantum key distribution (CV-QKD) system.

    Main Results:

    • AS-CMA demonstrated robust polarization recovery under simulated polarization disturbance rates of up to 10 Mrad/s over 25 km of single-mode fiber, with only a 12.9% decrease in secret key rate.
    • The algorithm maintained a positive secret key rate even under extreme transient disturbances of 43 Mrad/s, simulating lightning events.
    • Significant reduction in computational complexity was achieved compared to traditional CMA methods.

    Conclusions:

    • The AS-CMA offers an efficient and computationally inexpensive solution for polarization recovery in CV-QKD systems.
    • This algorithm enhances the reliability and security of quantum communication networks operating over long-distance fiber optic links.
    • AS-CMA shows promise for practical implementation in future secure communication infrastructures.