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

Entropy Change in Reversible Processes01:10

Entropy Change in Reversible Processes

In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
Transition State Theory01:25

Transition State Theory

Transition-state theory, also known as activated-complex theory, provides a molecular-level explanation of reaction rates in both gas-phase and solution-phase reactions. It extends earlier kinetic models by considering the formation of a short-lived, high-energy configuration during a reaction.The progress of a chemical reaction can be represented using a reaction profile, which plots potential energy against the reaction coordinate. As two reactant molecules approach one another, their...
Free Energy Changes for Nonstandard States03:25

Free Energy Changes for Nonstandard States

The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
Directionality of Nuclear Transport01:42

Directionality of Nuclear Transport

Ras-related nuclear protein or Ran is a small G protein that cycles between its GTP and GDP bound states. Ran specific regulators, a Ran GTPase Activating Protein or RanGAP present in the cytosol and a Ran guanine nucleotide exchange factor or RanGEF present inside the nucleus regulate GTP/GDP exchange. A high concentration of GTP inside the cells, in addition to this asymmetric distribution of  Ran-specific regulators, leads to a higher RanGTP concentration inside the nucleus. This...
Mean free path and Mean free time01:22

Mean free path and Mean free time

Consider the gas molecules in a cylinder. They move in a random motion as they collide with each other and change speed and direction. The average of all the path lengths between collisions is known as the "mean free path."
Reaction Mechanisms: The Steady-State Approximation01:26

Reaction Mechanisms: The Steady-State Approximation

The steady-state approximation, also referred to as the quasi-steady-state approximation to differentiate it from a true steady state, is a widely used method for simplifying calculations in complex reaction mechanisms. This approach is particularly useful when dealing with multi-step reactions that involve reverse reactions or several steps, which can significantly increase mathematical complexity and make the reactions nearly unsolvable analytically.The steady-state approximation operates on...

You might also read

Related Articles

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

Sort by
Same author

Strong noise suppression in non-Markovian transport through a vibrating molecular junction.

The Journal of chemical physics·2026
Same author

Beyond photon shot noise: Chemical limits in spectrophotometric precision.

The Journal of chemical physics·2026
Same author

Full-Counting Statistics and Quantum Information of Dispersive Readout with a Squeezed Environment.

Physical review letters·2026
Same author

Effects of LED light on fecundity of the Spodoptera frugiperda via the regulation of VgR.

Journal of photochemistry and photobiology. B, Biology·2026
Same author

Non-Markovian waiting-time distribution for electron transport through a vibrating molecular junction.

The Journal of chemical physics·2025
Same author

Phase-controlled quantum transport signatures in a quantum dot-Majorana hybrid ring system.

The Journal of chemical physics·2025

Related Experiment Video

Updated: Jun 24, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Complex non-Markovian effect on time-dependent quantum transport.

Xiao Zheng1, JunYan Luo, Jinshuang Jin

  • 1Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong. chxzheng@ust.hk

The Journal of Chemical Physics
|April 2, 2009
PubMed
Summary

Intra-system coupling in double-quantum-dot systems influences transient electronic dynamics. Complex non-Markovian effects are crucial for understanding quantum transport in nanoelectronic devices.

Related Experiment Videos

Last Updated: Jun 24, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Nanotechnology

Background:

  • Quantum dots are semiconductor nanocrystals with unique electronic properties.
  • Interdot coupling significantly influences the behavior of multi-dot systems.
  • Understanding transient electronic dynamics is key for developing quantum devices.

Purpose of the Study:

  • To investigate the impact of intrasystem and lead-mediated interdot coupling on transient electronic dynamics in a single-lead double-quantum-dot system.
  • To identify unique features in the response current spectrum arising from coupling effects.
  • To numerically demonstrate complex non-Markovian effects in quantum transport.

Main Methods:

  • Utilizing the exact theory based on hierarchical equations of motion.
  • Analyzing the reduced dynamics of quantum transport systems.
  • Numerical simulation of electronic dynamics.

Main Results:

  • Observed unique occupancy-state transition features in the response current spectrum.
  • Demonstrated the presence of irreducible frequency-dependent correlation functions.
  • Numerically confirmed complex non-Markovian effects.

Conclusions:

  • Intrasystem and lead-mediated interdot coupling significantly affect transient electronic dynamics.
  • Non-Markovian effects play a crucial and complex role in quantum transport.
  • These findings are relevant for realistic nanoelectronic devices.