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

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

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

1.6K
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...
1.6K
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

11.9K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
11.9K
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

966
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
966
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

1.7K
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...
1.7K
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

318
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
318
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.4K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.4K

You might also read

Related Articles

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

Sort by
Same author

Knowledge Mapping of Osteoimmunology:A Bibliometric Study.

Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae·2025
Same author

The influence of sleep disorders on perioperative neurocognitive disorders among the elderly: A narrative review.

Ibrain·2024
Same author

Epidural Anesthesia and Postoperative Delirium: Comment.

Anesthesiology·2021
Same author

The Involvement of the Chemokine RANTES in Regulating Luminal Acidification in Rat Epididymis.

Frontiers in immunology·2020
Same author

Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect.

Light, science & applications·2018
Same author

Reversible self-association of a concentrated monoclonal antibody solution mediated by Fab-Fab interaction that impacts solution viscosity.

Journal of pharmaceutical sciences·2008

Related Experiment Video

Updated: Jan 8, 2026

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

14.9K

Enhanced phase estimation with a displaced two-mode squeezed coherent state.

Pengxiang Ruan, Jun Liu, Dong-Xu Chen

    Optics Express
    |December 19, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel quantum interferometry scheme using displaced squeezed states for enhanced phase estimation. The proposed method surpasses the standard shot noise limit, offering improved precision and robustness in measurements.

    More Related Videos

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

    10.3K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.6K

    Related Experiment Videos

    Last Updated: Jan 8, 2026

    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

    14.9K
    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

    10.3K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.6K

    Area of Science:

    • Quantum optics
    • Quantum metrology
    • Interferometry

    Background:

    • Classical interferometry is limited by the shot noise limit.
    • Quantum states, particularly squeezed states, offer potential for enhanced measurement precision.

    Purpose of the Study:

    • To propose and theoretically analyze a Mach-Zehnder interferometer scheme using a displaced two-mode squeezed coherent state input.
    • To achieve phase sensitivity beyond the shot noise limit.

    Main Methods:

    • Utilizing a Mach-Zehnder interferometer with a novel displaced two-mode squeezed coherent state input.
    • Employing both intensity difference detection and balanced homodyne detection.
    • Theoretical calculations and analysis of quantum Cramér-Rao bound.

    Main Results:

    • The displaced squeezed state input achieves phase sensitivity exceeding the shot noise limit.
    • The proposed scheme demonstrates superior accuracy and robustness compared to standard two-mode squeezed coherent states.
    • Robustness increases with higher displacement strength, even with transmission and detection losses.

    Conclusions:

    • The proposed scheme offers a significant advancement in precision measurement using quantum interferometry.
    • Displaced squeezed states provide a powerful tool for overcoming classical measurement limitations.
    • This work presents new avenues for high-precision sensing applications.