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

Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

11.4K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
11.4K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

26.5K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.5K
Bewley Lattice Diagram01:12

Bewley Lattice Diagram

1.5K
The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
1.5K
BIBO stability of continuous and discrete -time systems01:24

BIBO stability of continuous and discrete -time systems

892
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....
892
Nuclear Stability03:18

Nuclear Stability

22.9K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
22.9K
RNA Stability01:53

RNA Stability

35.6K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.6K

You might also read

Related Articles

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

Sort by
Same author

Memory-Assisted Nonlocal Interferometer toward Long-Baseline Telescopes.

Physical review letters·2026
Same author

10<sup>-21</sup>-Level optical frequency dissemination over 2067 km of noise-loaded field-deployed fiber network.

Light, science & applications·2026
Same author

Low-voltage silicon photonics modulator with CMOS-compatible driving for compact quantum key distribution transmitters.

Optics express·2026
Same author

Entanglement Swapping Enables the Practical Security of Quantum Cryptography.

Entropy (Basel, Switzerland)·2026
Same author

Gaussian boson sampling with 1,024 squeezed states in 8,176 modes.

Nature·2026
Same author

Taming Rydberg Decay with Measurement-Based Quantum Computation.

Physical review letters·2026

Related Experiment Video

Updated: Jan 22, 2026

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
09:45

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

12.8K

Zero-Dead-Time Strontium Lattice Clock with a Stability at 10^{-19} Level.

Xiao-Yong Liu1,2, Peng Liu2,3, Jie Li1,2

  • 1Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China.

Physical Review Letters
|January 20, 2026
PubMed
Summary

This study introduces a zero-dead-time optical atomic clock using two interleaved strontium atom ensembles. This novel design significantly reduces laser frequency noise, achieving unprecedented stability for advanced timekeeping.

More Related Videos

Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals
11:17

Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals

Published on: February 9, 2017

10.2K
Clock Scan Protocol for Image Analysis: ImageJ Plugins
07:19

Clock Scan Protocol for Image Analysis: ImageJ Plugins

Published on: June 19, 2017

18.0K

Related Experiment Videos

Last Updated: Jan 22, 2026

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
09:45

Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

Published on: July 26, 2016

12.8K
Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals
11:17

Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals

Published on: February 9, 2017

10.2K
Clock Scan Protocol for Image Analysis: ImageJ Plugins
07:19

Clock Scan Protocol for Image Analysis: ImageJ Plugins

Published on: June 19, 2017

18.0K

Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Metrology and Measurement Science
  • Quantum Information Science

Background:

  • Optical atomic clocks are vital for fundamental physics and redefining the SI second.
  • Conventional clocks suffer from the Dick effect due to dead time in interrogation cycles.
  • Laser frequency noise aliasing onto atomic transitions limits clock stability.

Purpose of the Study:

  • To demonstrate a zero-dead-time optical clock to overcome the Dick effect.
  • To improve the stability and accuracy of optical atomic clocks.
  • To advance next-generation timekeeping applications.

Main Methods:

  • Utilized two interleaved ensembles of cold ^{87}Sr atoms.
  • Implemented a zero-dead-time interrogation sequence.
  • Measured fractional frequency instability over extended periods.

Main Results:

  • Achieved fractional frequency instability at the 10^{-19} level.
  • Demonstrated a best instability value of 2.9×10^{-19} at 20,000 seconds.
  • Estimated long-term stability reached 2.5×10^{-19} at 1 day.
  • Achieved a ninefold improvement over single-ensemble clocks.

Conclusions:

  • The zero-dead-time approach effectively suppresses the Dick effect.
  • This clock design offers superior stability for fundamental science and metrology.
  • Represents a significant advancement for future timekeeping standards.