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Excitation transfer in disordered spin chains with long-range exchange interactions

by Nikolaos E. Palaiodimopoulos, Maximilian Kiefer-Emmanouilidis, Gershon Kurizki and David Petrosyan

This Submission thread is now published as

Submission summary

Authors (as registered SciPost users): Nikolaos Palaiodimopoulos
Submission information
Preprint Link: scipost_202209_00031v2  (pdf)
Date accepted: 2022-12-01
Date submitted: 2022-11-04 16:08
Submitted by: Palaiodimopoulos, Nikolaos
Submitted to: SciPost Physics Core
Ontological classification
Academic field: Physics
Specialties:
  • Quantum Physics
Approaches: Theoretical, Computational

Abstract

We examine spin excitation or polarization transfer via spin chains with long-range exchange interactions in the presence of diagonal and off-diagonal disorder. To this end, we determine the mean localization length of the single-excitation eigenstates of the chain for various strengths of the disorder. We then identify the energy eigenstates of the system with large localization length and sufficient support at the chain boundaries that are suitable to transfer an excitation between the sender and receiver spins connected to the opposite ends of the chain. We quantify the performance of two transfer schemes involving weak static couplings of the sender and receiver spins to the chain, and time-dependent couplings realizing stimulated adiabatic passage of the excitation via the intermediate eigenstates of the chain which exhibits improved performance.

Published as SciPost Phys. Core 6, 017 (2023)



Author comments upon resubmission

Dear Editor and the SciPost Team members,

Thank you very much for considering our manuscript and sending it to a reviewer.
We have carefully considered the report of a Referee and made the necessary
amendments in our manuscript. We present a detailed response to the Referee's
report, followed by the summary of changes.

Sincerely,
N. E. Palaiodimopoulos,
on behalf of all the authors

List of changes

In the abstract, and throughout the manuscript, we now always specify
"exchange interactions" to avoid the confusion.

The second paragraph of Sec. 2 is modified and expanded for clear formulation
of the problem.

In the last three lines of page 4, we added a new text stating the relation
between the number variance and entanglement entropy and citing refs. [35,36].

The first sentence in the second paragraph of Sec. 4 is modified for clarity.

In the paragraph "Static coupling to the chain" in sec. 4 we have added
new text on the linear scaling of the transfer time and its relation with
the Lieb-Robinson bound, citing refs. [50-52].

A number of corrections and improvement of the text and figure captions
were made.

New references [33,34,36,50,51,52] were added, other references appropriately
shifted.

Submission & Refereeing History

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Resubmission scipost_202209_00031v2 on 4 November 2022

Reports on this Submission

Anonymous Report 1 on 2022-11-24 (Invited Report)

Report

The authors have successfully cleared all my doubts and made the required modifications to the manuscript. I am glad to recommend it for publication in SciPost Physics Core.

Requested changes

None. :)

  • validity: high
  • significance: high
  • originality: high
  • clarity: high
  • formatting: excellent
  • grammar: excellent

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