Exploring the limits of the generation of non-classical states of spins
coupled to a cavity by optimal control
- URL: http://arxiv.org/abs/2107.07992v3
- Date: Fri, 17 Jun 2022 09:05:35 GMT
- Title: Exploring the limits of the generation of non-classical states of spins
coupled to a cavity by optimal control
- Authors: Quentin Ansel, Dominique Sugny, Bruno Bellomo
- Abstract summary: We investigate the generation of non-classical states of spins coupled to a common cavity by means of a collective driving of the spins.
We propose a control strategy using specifically designed series of short coherent and squeezing pulses.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the generation of non-classical states of spins coupled to a
common cavity by means of a collective driving of the spins. We propose a
control strategy using specifically designed series of short coherent and
squeezing pulses, which have the key advantage of being experimentally
implementable with the state-of-the art techniques. The parameters of the
control sequence are found by means of optimization algorithms. We consider the
cases of two and four spins, the goal being either to reach a well-defined
target state or a state maximizing a measure of non-classicality. We discuss
the influence of cavity damping and spin offset on the generation of
non-classical states. We also explore to which extent squeezing fields help
enhancing the efficiency of the control process.
Related papers
- Quantum Optimal Control of Squeezing in Cavity Optomechanics [0.0]
Squeezing is a non-classical feature of quantum states that is a useful resource, for example in quantum sensing of mechanical forces.
We show how to use optimal control theory to maximize squeezing in an optomechanical setup with two external drives.
arXiv Detail & Related papers (2024-05-29T13:23:57Z) - A Strategy for Preparing Quantum Squeezed States Using Reinforcement Learning [0.0]
We propose a scheme leveraging reinforcement learning to engineer control fields for generating non-classical states.
The reinforcement learning agent determines the temporal sequence of control pulses, commencing from a coherent spin state.
This research paves the way for its application in manipulating other quantum systems.
arXiv Detail & Related papers (2024-01-29T17:23:25Z) - Generation of C-NOT, SWAP, and C-Z Gates for Two Qubits Using Coherent
and Incoherent Controls and Stochastic Optimization [56.47577824219207]
We consider a general form of the dynamics of open quantum systems determined by the Gorini-Kossakowsky-Sudarchhan-Lindblad type master equation.
We analyze the control problems of generating two-qubit C-NOT, SWAP, and C-Z gates using piecewise constant controls and optimization.
arXiv Detail & Related papers (2023-12-09T17:55:47Z) - Optimal State Manipulation for a Two-Qubit System Driven by Coherent and
Incoherent Controls [77.34726150561087]
State preparation is important for optimal control of two-qubit quantum systems.
We exploit two physically different coherent control and optimize the Hilbert-Schmidt target density matrices.
arXiv Detail & Related papers (2023-04-03T10:22:35Z) - Optimal control for state preparation in two-qubit open quantum systems
driven by coherent and incoherent controls via GRAPE approach [77.34726150561087]
We consider a model of two qubits driven by coherent and incoherent time-dependent controls.
The dynamics of the system is governed by a Gorini-Kossakowski-Sudarshan-Lindblad master equation.
We study evolution of the von Neumann entropy, purity, and one-qubit reduced density matrices under optimized controls.
arXiv Detail & Related papers (2022-11-04T15:20:18Z) - Multi-squeezed state generation and universal bosonic control via a
driven quantum Rabi model [68.8204255655161]
Universal control over a bosonic degree of freedom is key in the quest for quantum-based technologies.
Here we consider a single ancillary two-level system, interacting with the bosonic mode of interest via a driven quantum Rabi model.
We show that it is sufficient to induce the deterministic realization of a large class of Gaussian and non-Gaussian gates, which in turn provide universal bosonic control.
arXiv Detail & Related papers (2022-09-16T14:18:53Z) - Counterdiabatic Optimised Local Driving [0.0]
Adiabatic protocols are employed across a variety of quantum technologies.
The problem of speeding up these processes has garnered a large amount of interest.
Two approaches are complementary: optimal control manipulates control fields to steer the dynamics.
shortcuts to adiabaticity aim to retain the adiabatic condition upon speed-up.
arXiv Detail & Related papers (2022-03-03T19:00:00Z) - Numerical estimation of reachable and controllability sets for a
two-level open quantum system driven by coherent and incoherent controls [77.34726150561087]
The article considers a two-level open quantum system governed by the Gorini--Kossakowski--Lindblad--Sudarshan master equation.
The system is analyzed using Bloch parametrization of the system's density matrix.
arXiv Detail & Related papers (2021-06-18T14:23:29Z) - Generation and storage of spin squeezing via learning-assisted optimal
control [7.460567829296081]
We consider a collective spin system coupled to a bosonic field, and show that proper constant-value controls in this model can simulate the dynamical behaviors of these two models.
A better performance of squeezing can be obtained when the control is time-varying, which is generated via a reinforcement learning algorithm.
We propose a four-step strategy for the construction of a new type of combined controls, which include both constant-value and time-varying controls, but performed at different time intervals.
arXiv Detail & Related papers (2020-10-26T09:31:04Z) - Optimal non-classical correlations of light with a levitated nano-sphere [48.7576911714538]
Nonclassical correlations provide a resource for many applications in quantum technology.
Optomechanical systems can be arranged to generate quantum entanglement between the mechanics and a mode of travelling light.
We propose automated optimisation of the production of quantum correlations in such a system.
arXiv Detail & Related papers (2020-06-26T15:27:47Z)
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.