Related Experiment Video
Updated: Aug 16, 2025
16:23
Automated, Quantitative Cognitive/Behavioral Screening of Mice: For Genetics, Pharmacology, Animal Cognition and Undergraduate Instruction
Published on: February 26, 2014
14.4K
Pedagogical Overview of the Fewest Switches Surface Hopping Method
1Department of Chemistry, Indian Institute of Technology Bombay, Mumbai400076, India.
ACS Omega
|December 26, 2022
Summary
The fewest switches surface hopping method accurately models quantum effects in chemical reactions. This review clarifies its fundamentals, implementation, and potential pitfalls for researchers.
Area of Science:
- Computational Chemistry
- Quantum Dynamics
Background:
- The fewest switches surface hopping (FSSH) method is increasingly used for simulating nonadiabatic dynamics.
- Accurate modeling of electronic nonadiabaticity and quantum nuclear effects is crucial in chemistry.
Purpose of the Study:
- To provide a comprehensive review of the FSSH method.
- To clarify fundamental concepts, implementation details, and common challenges.
Main Methods:
- Detailed discussion of FSSH fundamentals.
- Exploration of decoherence schemes and frustrated hops.
- Guidance on calculating populations and properties.
Main Results:
- Highlights the importance of correct implementation for accurate kinetic and thermodynamic property calculations.
- Identifies potential consequences of incorrect FSSH application.
- Offers practical tips for users and an algorithm for developers.
Conclusions:
- Emphasizes the value of understanding FSSH nuances for reliable computational results.
- Aims to improve the application and interpretation of FSSH simulations in research.
- Provides resources for graduate students to deepen their appreciation of the method.
Related Concept Videos
01:22Switching of BJT
481
Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
481
01:23Propagation of Action Potentials
6.4K
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
6.4K
01:22MOSFET: Enhancement Mode
433
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
433
01:25Overview of Synapses
2.5K
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
2.5K
01:16Hydraulic Jump: Problem Solving
110
To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
110
01:17The Delta-to-Delta Circuit
700
In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.
700