Quantum speed limits on operator flows and correlation functions

N Carabba, N Hörnedal, A del Campo - Quantum, 2022 - quantum-journal.org
Quantum speed limits (QSLs) identify fundamental time scales of physical processes by
providing lower bounds on the rate of change of a quantum state or the expectation value of …

Quantum speed limits for observables

B Mohan, AK Pati - Physical Review A, 2022 - APS
In the Schrödinger picture, the state of a quantum system evolves in time and the quantum
speed limit describes how fast the state of a quantum system evolves from an initial state to a …

Stronger speed limit for observables: Tighter bound for the capacity of entanglement, the modular Hamiltonian, and the charging of a quantum battery

D Shrimali, B Panda, AK Pati - Physical Review A, 2024 - APS
How fast an observable can evolve in time is answered by so-called observable speed limit.
Here, we prove a stronger version of the observable speed limit and show that the …

[HTML][HTML] Experimental investigation of geometric quantum speed limits in an open quantum system

DP Pires, ER deAzevedo, DO Soares-Pinto… - Communications …, 2024 - nature.com
The quantum speed limit (QSL) is a fundamental lower bound on the evolution time for
quantum systems, and its tightness has been observed to be dependent on the properties of …

Capacity of entanglement for a nonlocal Hamiltonian

D Shrimali, S Bhowmick, V Pandey, AK Pati - Physical Review A, 2022 - APS
The notion of capacity of entanglement is the quantum information theoretic counterpart of
the heat capacity which is defined as the second cumulant of the entanglement spectrum …

Speed limits on correlations in bipartite quantum systems

V Pandey, D Shrimali, B Mohan, S Das, AK Pati - Physical Review A, 2023 - APS
Quantum speed limit is bound on the minimum time a quantum system requires to evolve
from an initial state to final state under a given dynamical process. It sheds light on how fast …

Generalised quantum speed limit for arbitrary time-continuous evolution

D Thakuria, A Srivastav, B Mohan… - Journal of Physics A …, 2023 - iopscience.iop.org
The quantum speed limit describes how quickly a quantum system can evolve in time from
an initial state to a final state under a given dynamics. Here, we derive a generalised …

Shortest evolution path between two mixed states and its realization

JH Huang, SS Dong, GL Chen, NR Zhou, FY Liu… - Physical Review A, 2024 - APS
In a quantum unitary system, an initial state may have different paths to evolve to a target
state, and the only requirement is that the initial and target states share the same eigenvalue …

Nonlinear speed-ups in ultracold quantum gases

S Deffner - Europhysics Letters, 2022 - iopscience.iop.org
Quantum mechanics is an inherently linear theory. However, collective effects in many body
quantum systems can give rise to effectively nonlinear dynamics. In the present work, we …

Quantum speed limit in terms of coherence variations

Z Mai, C Yu - Physical Review A, 2024 - APS
Coherence is the most fundamental quantum resource in quantum information processing.
How fast a physical system gets coherence or decoherence is a critical ingredient. We …