Related Experiment Video
Updated: Jul 12, 2026
11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Dissipative Phase Transition of Interacting Nonreciprocal Fermions.
Rafael D Soares1,2, Matteo Brunelli2, Marco Schirò2
1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany.
Physical Review Letters
|July 10, 2026
Summary
Nonreciprocal couplings in quantum systems drive a novel phase transition, altering relaxation dynamics and entanglement. Reciprocity is restored at higher interaction strengths.
Area of Science:
- Quantum physics
- Condensed matter physics
- Many-body systems
Background:
- Nonreciprocal couplings are common in classical systems but their quantum effects are understudied.
- Quantum many-body criticality and entanglement are key areas of research.
Purpose of the Study:
- Investigate the impact of nonreciprocal gain and loss on interacting fermionic chains.
- Explore quantum many-body criticality and entanglement in dissipative systems.
Main Methods:
- Exact numerical simulations of an interacting fermionic chain.
- Analysis of quantum trajectories and entanglement properties.
Main Results:
- A dissipative phase transition driven by dissipation and interactions.
- Opening of a many-body gap and crossover from power-law to exponential relaxation.
- Nonreciprocal signatures like nonzero currents and directional charge accumulation (skin effect).
- Volume-law entanglement observed despite localization.
- Dynamic restoration of reciprocity above a critical interaction strength.
Conclusions:
- Nonreciprocal couplings can induce unique dissipative phase transitions in quantum systems.
- These transitions affect relaxation dynamics and exhibit intriguing entanglement properties.
- The interplay between dissipation, interactions, and nonreciprocity offers new avenues for quantum research.
More Related Videos
10:08Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
Published on: October 24, 2017
06:26Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
Related Concept Videos
01:21Phase 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...
02:31Phase 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...
02:33Phase Transitions: Sublimation and Deposition
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
02:39Phase Transitions: Vaporization and Condensation
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
02:39Phase 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...
01:24Electrochemical Systems
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...