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

Detection of Black Holes01:10

Detection of Black Holes

2.2K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.2K
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

956
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
956
Sinusoidal Sources01:18

Sinusoidal Sources

570
Direct current (DC) refers to an electric current that flows in a single direction, maintaining a constant polarity. This is in contrast to alternating current (AC), which periodically changes its direction and magnitude. AC forms the backbone of modern electricity transmission and distribution systems due to its efficient long-distance transmission capabilities.
In homes, the power supplies use sinusoidal sources to provide electricity. These sources generate a voltage that varies sinusoidally...
570
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

1.1K
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...
1.1K
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

1.5K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
1.5K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

524
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
524

You might also read

Related Articles

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

Sort by
Same author

Black Hole Spectroscopy and Tests of General Relativity with GW250114.

Physical review letters·2026
Same author

GW250114: Testing Hawking's Area Law and the Kerr Nature of Black Holes.

Physical review letters·2025
Same author

A rare case of ankle peri-implant infection by multi drug resistant Chryseobacterium indologenes.

Acta orthopaedica Belgica·2025
Same author

Investigating the impact of the regularization parameter on EEG resting-state source reconstruction and functional connectivity using real and simulated data.

NeuroImage·2024
Same author

Partial rescue of the full-field electroretinogram in patients with RPE65-related retinal dystrophy following gene augmentation therapy with voretigene neparvovec-rzyl.

Documenta ophthalmologica. Advances in ophthalmology·2024
Same author

Designing the stripe-ordered cuprate phase diagram through uniaxial-stress.

Proceedings of the National Academy of Sciences of the United States of America·2023

Related Experiment Video

Updated: Jul 19, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

21.8K

Frequency-Dependent Squeezed Vacuum Source for the Advanced Virgo Gravitational-Wave Detector.

F Acernese1,2, M Agathos3, A Ain4

  • 1Dipartimento di Farmacia, Università di Salerno, I-84084 Fisciano, Salerno, Italy.

Physical Review Letters
|August 11, 2023
PubMed
Summary

We developed a frequency-dependent squeezed vacuum source to reduce quantum noise in the Advanced Virgo Plus gravitational-wave detector. This technology is crucial for enhancing gravitational-wave detection sensitivity.

More Related Videos

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.4K
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

9.8K

Related Experiment Videos

Last Updated: Jul 19, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

21.8K
Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.4K
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

9.8K

Area of Science:

  • Quantum Optics
  • Gravitational-Wave Astronomy

Background:

  • Advanced Virgo Plus requires broadband quantum noise reduction for enhanced sensitivity.
  • Quantum noise limits the sensitivity of current gravitational-wave detectors.

Purpose of the Study:

  • To design and test a frequency-dependent squeezed vacuum source for the Advanced Virgo Plus detector.
  • To achieve broadband quantum noise reduction in gravitational-wave measurements.

Main Methods:

  • Generated frequency-dependent squeezed light by phase-rotating a squeezed vacuum state.
  • Utilized a 285m long, high-finesse, near-detuned optical resonator for phase rotation.
  • Maintained rotation frequency stability within 6 Hz rms.

Main Results:

  • Achieved approximately 8.5 dB of generated squeezing.
  • Demonstrated up to 5.6 dB quantum noise suppression at high frequencies.
  • Measured ~2 dB noise reduction near the filter cavity resonance frequency due to intracavity losses.
  • Expected reduction of quantum shot noise and radiation pressure noise by up to 4.5 dB and 2 dB, respectively, within the interferometer.

Conclusions:

  • The developed frequency-dependent squeezed vacuum source meets the requirements for the Advanced Virgo Plus.
  • The technology promises significant improvements in gravitational-wave detection sensitivity by reducing quantum noise.