Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Phase Transitions

Phase Transitions

A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...

Phase Transitions

Phase Transitions

Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to occupy...

Phase Transitions: Melting and Freezing

Phase Transitions: Melting and Freezing

Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...

The de Broglie Wavelength

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

Entropy Changes Accompanying Specific Processes

Entropy Changes Accompanying Specific Processes

Entropy, a measure of disorder in a system, changes during phase transitions like freezing or boiling. At the transition temperature Ttrs, where two phases are in equilibrium, the phase transition is a reversible process. The entropy change can be calculated from a substance's enthalpy of transition using the equation ΔStrs = ΔtrsH /Ttrs.When a perfect gas expands isothermally from one volume to another, entropy increases logarithmically with volume. Conversely, isothermal compression results...

The Bohr Model

The Bohr Model

Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as the nucleus...

You might also read

Related Articles

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

Sort by

Same author

Quantum walks on a programmable two-dimensional 62-qubit superconducting processor.

Science (New York, N.Y.)·2021

Same author

Chimera Time-Crystalline Order in Quantum Spin Networks.

Physical review letters·2021

Same author

Ergodic-Localized Junctions in a Periodically Driven Spin Chain.

Physical review letters·2020

Same author

Simulating complex quantum networks with time crystals.

Science advances·2020

Same author

Perpetual emulation threshold of <math><mrow><mi>P</mi> <mi>T</mi></mrow></math> -symmetric Hamiltonians.

Journal of physics. A, Mathematical and theoretical·2019

Same author

LO-Phonon Emission Rate of Hot Electrons from an On-Demand Single-Electron Source in a GaAs/AlGaAs Heterostructure.

Physical review letters·2018

Search research articles

Related Experiment Video

Updated: May 24, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Nonequilibrium quantum phase transitions in the Dicke model.

V M Bastidas¹, C Emary, B Regler

¹Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, D-10623 Berlin, Germany.

Physical Review Letters

|March 10, 2012

Summary

This study reveals novel quantum phase transitions in the Dicke model using modulated atom-field coupling. Weak driving bypasses limitations for superradiant transitions, while strong driving induces multistability and various order phase transitions.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

Related Experiment Videos

Last Updated: May 24, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

Area of Science:

Quantum physics
Condensed matter theory
Atomic physics

Background:

The Dicke model describes light-matter interactions.
Superradiant phase transitions are typically forbidden under certain conditions.
Nonequilibrium quantum phenomena are crucial for understanding complex quantum systems.

Purpose of the Study:

To investigate the possibility of inducing quantum phase transitions in the Dicke model.
To explore the effects of nonadiabatic modulation on atom-field coupling.
To circumvent the no-go theorem preventing superradiant phase transitions.

Main Methods:

Applying a monochromatic nonadiabatic modulation to the atom-field coupling.
Analyzing system behavior under weak and strong driving conditions.
Identifying and characterizing nonequilibrium quantum phase transitions.

Main Results:

Established a set of nonequilibrium quantum phase transitions in the Dicke model.
Observed sidebands under weak driving, enabling the circumvention of the no-go theorem for superradiant phase transitions.
Demonstrated a rich multistable structure under strong driving, exhibiting first- and second-order nonequilibrium quantum phase transitions.

Conclusions:

Nonadiabatic modulation of atom-field coupling provides a viable route to observe superradiant phase transitions.
The Dicke model under strong driving exhibits complex nonequilibrium behavior with multiple stable states.
This work opens new avenues for exploring and controlling quantum phase transitions in driven quantum systems.