Correlations and energy in mediated dynamics
- URL: http://arxiv.org/abs/2208.14310v1
- Date: Tue, 30 Aug 2022 14:49:08 GMT
- Title: Correlations and energy in mediated dynamics
- Authors: Tanjung Krisnanda, Su-Yong Lee, Changsuk Noh, Jaewan Kim, Alexander
Streltsov, Timothy C. H. Liew, and Tomasz Paterek
- Abstract summary: We study the time required to maximally entangle two principal systems interacting under the same energy constraints.
Direct interactions are proved to provide the fastest way to entangle the principal systems, but it turns out that there exist mediated dynamics that are just as fast.
The final message is that correlations save energy: one has to supply extra energy if maximal entanglement across the principal systems is to be obtained as fast as with an initially correlated mediator.
- Score: 50.220421906597416
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The minimum time required for a quantum system to evolve to a distinguishable
state is set by the quantum speed limit, and consequently influences the change
of quantum correlations and other physical properties. Here we study the time
required to maximally entangle two principal systems interacting either
directly or via a mediating ancillary system, under the same energy
constraints. The direct interactions are proved to provide the fastest way to
entangle the principal systems, but it turns out that there exist mediated
dynamics that are just as fast. We show that this can only happen if the
mediator is initially correlated with the principal systems. These correlations
can be fully classical and can remain classical during the entangling process.
The final message is that correlations save energy: one has to supply extra
energy if maximal entanglement across the principal systems is to be obtained
as fast as with an initially correlated mediator.
Related papers
- Observing Time-Dependent Energy Level Renormalisation in an Ultrastrongly Coupled Open System [37.69303106863453]
We show how strong coupling and memory effects influence the energy levels of open quantum systems.
Measurements reveal a time-dependent shift in the system's energy levels of up to 15% of the bare system frequency.
Our findings provide direct evidence of dynamic energy level renormalisation in strongly coupled open quantum systems.
arXiv Detail & Related papers (2024-08-28T16:40:55Z) - Improving the understanding of the dynamics of open quantum systems [0.0]
This thesis presents studies performed on open quantum systems, that is, quantum systems interacting with their surrounding environment.
A common assumption is that the system and the environment are in separated initial states to begin with.
We show that the role played by initial correlations can be noticeable even if the SE coupling strength is kept smaller.
arXiv Detail & Related papers (2023-12-24T17:19:03Z) - Fundamental limits on anomalous energy flows in correlated quantum systems [0.0]
In classical thermodynamics energy always flows from the hotter system to the colder one.
If these systems are initially correlated, the energy flow can reverse, making the cold system colder and the hot system hotter.
This intriguing phenomenon is called anomalous energy flow'' and shows the importance of initial correlations in determining physical properties of thermodynamic systems.
arXiv Detail & Related papers (2023-07-07T20:51:48Z) - Quantum dynamical speedup for correlated initial states [0.0]
We consider a model in which the system has a correlation with the environment.
The influence of the initial correlation between the system and environment on the quantum speed limit is investigated.
arXiv Detail & Related papers (2023-02-18T15:37:53Z) - Quantum Lyapunov exponent in dissipative systems [68.8204255655161]
The out-of-time order correlator (OTOC) has been widely studied in closed quantum systems.
We study the interplay between these two processes.
The OTOC decay rate is closely related to the classical Lyapunov.
arXiv Detail & Related papers (2022-11-11T17:06:45Z) - Initial Correlations in Open Quantum Systems: Constructing Linear
Dynamical Maps and Master Equations [62.997667081978825]
We show that, for any predetermined initial correlations, one can introduce a linear dynamical map on the space of operators of the open system.
We demonstrate that this construction leads to a linear, time-local quantum master equation with generalized Lindblad structure.
arXiv Detail & Related papers (2022-10-24T13:43:04Z) - Energy dynamics, information and heat flow in quenched cooling and the
crossover from quantum to classical thermodynamics [0.0]
We show that at the shortest timescales there is an energy increase in each system linked to the entropy gain.
Counter-intuitively, this implies that also the hotter of the two systems generically experiences an initial energy increase when brought into contact with the other colder system.
In the limit where the energy relaxation overwhelms the (quantum) correlation build-up, classical energy dynamics emerges where the energy in the hot system decreases immediately upon contact with a cooler system.
arXiv Detail & Related papers (2022-04-26T16:11:01Z) - A shortcut to adiabaticity in a cavity with a moving mirror [58.720142291102135]
We describe for the first time how to implement shortcuts to adiabaticity in quantum field theory.
The shortcuts take place whenever there is no dynamical Casimir effect.
We obtain a fundamental limit for the efficiency of an Otto cycle with the quantum field as a working system.
arXiv Detail & Related papers (2022-02-01T20:40:57Z) - There is only one time [110.83289076967895]
We draw a picture of physical systems that allows us to recognize what is this thing called "time"
We derive the Schr"odinger equation in the first case, and the Hamilton equations of motion in the second one.
arXiv Detail & Related papers (2020-06-22T09:54:46Z) - Speed limit for open systems coupled to general environments [0.0]
We show that a Mandelstam-Tamm type speed limit exists and energy fluctuation still plays a crucial role in this speed limit inequality for open quantum systems.
As potential applications, we discuss the fundamental limitation of the state change in quantum cyclic engines and the equilibriation time required for the thermalization phenomena of isolated quantum systems.
arXiv Detail & Related papers (2020-02-27T09:27:35Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.