Optimization of Partially Isolated Quantum Harmonic Oscillator Memory Systems by Mean Square Decoherence Time Criteria

Igor G. Vladimirov, Ian R. Petersen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper is concerned with open quantum harmonic oscillators with position-momentum system variables, whose internal dynamics and interaction with the environment are governed by linear quantum stochastic differential equations. A recently proposed approach to such systems as Heisenberg picture quantum memories exploits their ability to approximately retain initial conditions over a decoherence horizon. Using the quantum memory decoherence time defined previously in terms of a fidelity threshold on a weighted mean-square deviation of the system variables from their initial values, we apply this approach to a partially isolated subsystem of the oscillator, which is not directly affected by the external fields. The partial isolation leads to an appropriate system decomposition and a qualitatively different short-horizon asymptotic behaviour of the deviation, which yields a longer decoherence time in the high-fidelity limit. The resulting approximate decoherence time maximization over the energy parameters for improving the quantum memory performance is discussed for a coherent feedback interconnection of such systems.

Original languageEnglish
Title of host publication2025 Australian and New Zealand Control Conference, ANZCC 2025
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages64-69
Number of pages6
ISBN (Electronic)9798331532192
DOIs
Publication statusPublished - 2025
Event2025 Australian and New Zealand Control Conference, ANZCC 2025 - Gold Coast, Australia
Duration: 30 Jan 202531 Jan 2025

Publication series

Name2025 Australian and New Zealand Control Conference, ANZCC 2025

Conference

Conference2025 Australian and New Zealand Control Conference, ANZCC 2025
Country/TerritoryAustralia
CityGold Coast
Period30/01/2531/01/25

Fingerprint

Dive into the research topics of 'Optimization of Partially Isolated Quantum Harmonic Oscillator Memory Systems by Mean Square Decoherence Time Criteria'. Together they form a unique fingerprint.

Cite this