Information flow and error scaling for fully quantum control - Kölner UniversitätsPublikationsServer

Gherardini, Stefano ORCID: 0000-0002-9254-507X, Mueller, Matthias M., Montangero, Simone ORCID: 0000-0002-8882-2169, Calarco, Tommaso and Caruso, Filippo ORCID: 0000-0002-8366-4296 (2022). Information flow and error scaling for fully quantum control. Phys. Rev. Res., 4 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2643-1564

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DOI:10.1103/PhysRevResearch.4.023027

Abstract

The optimally designed control of quantum systems is playing an increasingly important role to engineer novel and more efficient quantum technologies. Here, in the scenario represented by controlling an arbitrary quantum system via the interaction with an another optimally initialized auxiliary quantum system, we show that the quantum channel capacity sets the scaling behavior of the optimal control error. Specifically, by fitting the model to numerical data, we verify that the minimum control error is ensured by maximizing the quantum capacity of the channel mapping the initial control state into the target state of the controlled system, i.e., optimizing the quantum information flow from the controller to the system to be controlled. Analytical results, supported by numerical evidences, are provided when the systems and the controller are either qubits or single Bosonic modes.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Gherardini, Stefano	UNSPECIFIED	orcid.org/0000-0002-9254-507X	UNSPECIFIED
Mueller, Matthias M.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Montangero, Simone	UNSPECIFIED	orcid.org/0000-0002-8882-2169	UNSPECIFIED
Calarco, Tommaso	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Caruso, Filippo	UNSPECIFIED	orcid.org/0000-0002-8366-4296	UNSPECIFIED