Related Experiment Video
Updated: Aug 22, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.6K
Quantum Information Scrambling in Non-Markovian Open Quantum System.
Li-Ping Han1,2, Jian Zou1, Hai Li3
1Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology, Beijing 100081, China.
Entropy (Basel, Switzerland)
|November 11, 2022
Summary
Tripartite logarithmic negativity (TLN) is a better measure of information scrambling in open quantum systems than tripartite mutual information (TMI). Non-Markovian environments can enhance scrambling, though environments are generally detrimental long-term.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Open Quantum Systems
Background:
- Information scrambling quantifies how quantum information spreads within a quantum system.
- Existing studies primarily focus on Markovian environments, leaving the role of non-Markovian environments unclear.
- The suitability of tripartite mutual information (TMI) for quantifying scrambling in open systems requires further investigation.
Purpose of the Study:
- To investigate information scrambling dynamics in a spin chain coupled to two independent non-Markovian baths.
- To determine appropriate quantifiers for information scrambling in open quantum systems.
- To explore the impact of non-Markovian environments on information scrambling.
Main Methods:
- Utilized the non-Markovian quantum state diffusion (QSD) equation approach.
- Analyzed the behavior of tripartite mutual information (TMI) and tripartite logarithmic negativity (TLN) as scrambling quantifiers.
- Studied a spin chain model interacting with two independent non-Markovian environments.
Main Results:
- Negative tripartite logarithmic negativity (TLN) is identified as a suitable quantifier for information scrambling in open quantum systems, unlike negative TMI in certain cases.
- The memory effect inherent in non-Markovian environments is found to be beneficial for information scrambling.
- While environments generally degrade information scrambling in the long term, they can enhance it in the short term under specific conditions.
Conclusions:
- Tripartite logarithmic negativity (TLN) provides a more robust measure of information scrambling in open quantum systems compared to TMI.
- Non-Markovian environments play a crucial role in information scrambling, offering potential benefits in certain timescales.
- Understanding the interplay between system dynamics and non-Markovian environments is essential for controlling quantum information scrambling.
Related Concept Videos
01:10Entropy Change in Reversible Processes
2.7K
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.
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.
2.7K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.1K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.1K
02:45The Quantum-Mechanical Model of an Atom
42.8K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
42.8K
02:39Entropy
30.7K
Salt particles that have dissolved in water never spontaneously come back together in solution to reform solid particles. Moreover, a gas that has expanded in a vacuum remains dispersed and never spontaneously reassembles. The unidirectional nature of these phenomena is the result of a thermodynamic state function called entropy (S). Entropy is the measure of the extent to which the energy is dispersed throughout a system, or in other words, it is proportional to the degree of disorder of a...
30.7K
03:25Free Energy Changes for Nonstandard States
11.6K
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:
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
11.6K
03:06The Pauli Exclusion Principle
45.0K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
45.0K