Measurement and feedback control are essential features of quantum science, with applications ranging from quantum technology protocols to information-to-work conversion in quantum thermodynamics. Theoretical descriptions of feedback control are typically given in terms of stochastic equations requiring numerical solutions, or are limited to linear feedback protocols. Here we present a formalism for continuous quantum measurement and feedback, both linear and nonlinear. Our main result is a quantum Fokker-Planck master equation describing the joint dynamics of a quantum system and a detector with finite bandwidth. For fast measurements, we derive a Markovian master equation for the system alone, amenable to analytical treatment. We illustrate our formalism by investigating two basic information engines, one quantum and one classical.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.129.050401 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Full-dimensional accurate potential energy surface and dynamics for the unimolecular isomerization reaction CH3NC ⇌ CH3CN.
J Chem Phys
January 2025
School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing 401331, China.
The reaction CH3NC ⇌ CH3CN, a model reaction for the study of unimolecular isomerization, is important in astronomy and atmospheric chemistry and has long been studied by numerous experiments and theories. In this work, we report the first full-dimensional accurate potential energy surface (PES) of this reaction by the permutation invariant polynomial-neural network method based on 30 974 points, whose energies are calculated at the CCSD(T)-F12a/AVTZ level. Then, ring polymer molecular dynamics is used to derive the free energy barrier of the reaction at the experimental temperature range of 472.
View Article and Find Full Text PDFThe Dynamics of Pheromone Release in Two Passive Dispensers Commonly Used for Mating Disruption in the Control of and in Vineyards.
Insects
December 2024
Department of Sustainable Crop Production (DiProVeS), Università Cattolica del Sacro Cuore di Piacenza, 29122 Piacenza, Italy.
Background: Mating disruption (MD) is a worthwhile technique for the control of and in central Europe and Mediterranean areas. MD efficacy is affected by the pheromone release (PR), which in turn is influenced by environmental conditions.
Methods: The effect of weather conditions on PR was evaluated under four different fields in northern Italy.
The Impact of Nursing Heads Leadership on Research Innovation Behavior of Junior Nurses with Master's Degree: The Mediation of Perceived Barriers and the Moderation of Motivation.
J Healthc Leadersh
December 2024
Neurology Department, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China.
Background: Nursing leadership is recognized as essential to fostering innovation in hospitals, while the precise relationship between them has yet to be established.
Aim: The objective of this study is to examine the association among leadership in nursing research, research motivation, perceived barriers, and innovation behavior of junior nurses who hold a master's degree or above in the hospital.
Methods: A cross-sectional survey was conducted and electronic questionnaires were distributed online.
Key Kinetic Interactions between NO and Unsaturated Hydrocarbons: H Atom Abstraction from C-C Alkynes, Dienes, and Trienes by NO.
J Phys Chem A
January 2025
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR 999077, China.
An adequate understanding of the NO interacting chemistry is a prerequisite for a smoother transition to carbon-lean and carbon-free fuels such as ammonia and hydrogen. In this regard, this study presents a comprehensive study on the H atom abstraction by NO from C to C alkynes, dienes, and trienes forming 3 HNO isomers (i.e.
View Article and Find Full Text PDFAssociation Kinetics for Perfluorinated -Alkyl Radicals.
J Phys Chem A
December 2024
Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States.
Radical-radical reaction channels are important in the pyrolysis and oxidation chemistry of perfluoroalkyl substances (PFAS). In particular, unimolecular dissociation reactions within unbranched -perfluoroalkyl chains, and their corresponding reverse barrierless association reactions, are expected to be significant contributors to the gas-phase thermal decomposition of families of species such as perfluorinated carboxylic acids and perfluorinated sulfonic acids. Unfortunately, experimental data for these reactions are scarce and uncertain.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!