Quantum speed of evolution of neutral mesons
- URL: http://arxiv.org/abs/2206.13938v2
- Date: Fri, 4 Aug 2023 13:52:16 GMT
- Title: Quantum speed of evolution of neutral mesons
- Authors: Subhashish Banerjee and K. G. Paulson
- Abstract summary: We investigate the quantum-mechanical time-evolution speed limit for neutral $K$ and $B$ mesons, both single as well as correlated, within the framework of open quantum systems.
The role of coherence--mixing, a crucial feature of the open system evolution of the underlying quantum systems (here, the mesons) on the quantum-mechanical time-evolution speed limit is studied.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the quantum-mechanical time-evolution speed limit for neutral
$K$ and $B$ mesons, both single as well as correlated, within the framework of
open quantum systems. The role of coherence--mixing, a crucial feature of the
open system evolution of the underlying quantum systems (here, the mesons), on
the quantum-mechanical time-evolution speed limit is studied. The impact of
decoherence and CP (charge conjugation parity) symmetry violation on
quantum-mechanical time-evolution speed limit is also investigated. The
quantum-mechanical time-evolution speed limit increases with the evolution time
for the single mesons, a signature of the underlying open system dynamics of
the evolution being semi-group in nature. The evolution of the correlated
mesons slows down for an evolution time of approximately one-fourth of the
lifetime, after which it is sped up. An overall pattern that emerges is that
correlated mesons evolve faster as compared to their uncorrelated counterparts,
suggesting that quantum correlations can speed up evolution.
Related papers
- Improvement of Speed Limits: Quantum Effect on the Speed in Open Quantum Systems [0.0]
entropy-based speed limits can be used to estimate the minimum time for evolution.
We have combined the knowledge of the entropy-based speed limits with that of the resource theory of asymmetry.
arXiv Detail & Related papers (2024-10-15T13:40:24Z) - 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 Speed Limit for Change of Basis [55.500409696028626]
We extend the notion of quantum speed limits to collections of quantum states.
For two-qubit systems, we show that the fastest transformation implements two Hadamards and a swap of the qubits simultaneously.
For qutrit systems the evolution time depends on the particular type of the unbiased basis.
arXiv Detail & Related papers (2022-12-23T14:10:13Z) - Generalised quantum speed limit for arbitrary time-continuous evolution [0.0]
We derive a generalised quantum speed limit (GQSL) for arbitrary time-continuous evolution using the geometrical approach of quantum mechanics.
The GQSL is applicable for quantum systems undergoing unitary, non-unitary, completely positive, non-completely positive and relativistic quantum dynamics.
arXiv Detail & Related papers (2022-07-08T21:00:11Z) - Unified entropies and quantum speed limits for nonunitary dynamics [0.0]
We discuss a class of quantum speed limits based on unified quantum ($alpha,mu$)-entropy for nonunitary physical processes.
We specialize these results to quantum channels and non-Hermitian evolutions.
arXiv Detail & Related papers (2022-04-13T15:51:43Z) - Optimal bounds on the speed of subspace evolution [77.34726150561087]
In contrast to the basic Mandelstam-Tamm inequality, we are concerned with a subspace subject to the Schroedinger evolution.
By using the concept of maximal angle between subspaces we derive optimal bounds on the speed of such a subspace evolution.
These bounds may be viewed as further generalizations of the Mandelstam-Tamm inequality.
arXiv Detail & Related papers (2021-11-10T13:32:15Z) - Time and Evolution in Quantum and Classical Cosmology [68.8204255655161]
We show that it is neither necessary nor sufficient for the Poisson bracket between the time variable and the super-Hamiltonian to be equal to unity in all of the phase space.
We also discuss the question of switching between different internal times as well as the Montevideo interpretation of quantum theory.
arXiv Detail & Related papers (2021-07-02T09:17:55Z) - Preserving quantum correlations and coherence with non-Markovianity [50.591267188664666]
We demonstrate the usefulness of non-Markovianity for preserving correlations and coherence in quantum systems.
For covariant qubit evolutions, we show that non-Markovianity can be used to preserve quantum coherence at all times.
arXiv Detail & Related papers (2021-06-25T11:52:51Z) - Observing crossover between quantum speed limits [0.0]
Two well-known quantum speed limits are the Mandelstam-Tamm and the Margolus-Levitin bounds.
Here, we test concurrently both limits in a multi-level system by following the motion of a single atom in an optical trap.
Our data reveal two different regimes: one where the Mandelstam-Tamm limit constrains the evolution at all times, and a second where a crossover to the Margolus-Levitin limit is manifested at longer times.
arXiv Detail & Related papers (2021-04-12T17:01:47Z) - Quantum speed limits for time evolution of a system subspace [77.34726150561087]
In the present work, we are concerned not with a single state but with a whole (possibly infinite-dimensional) subspace of the system states that are subject to the Schroedinger evolution.
We derive an optimal estimate on the speed of such a subspace evolution that may be viewed as a natural generalization of the Fleming bound.
arXiv Detail & Related papers (2020-11-05T12:13:18Z) - Jumptime unraveling of Markovian open quantum systems [68.8204255655161]
We introduce jumptime unraveling as a distinct description of open quantum systems.
quantum jump trajectories emerge, physically, from continuous quantum measurements.
We demonstrate that quantum trajectories can also be ensemble-averaged at specific jump counts.
arXiv Detail & Related papers (2020-01-24T09:35:32Z)
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.