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Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction

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Merynilda Ferreira, Onofre Rojas, Moises Rojas

Mesoscale and Nanoscale Physics · Submitted 12 Mar 2022

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We observe that the correlated coherence is more robust than the thermal entanglement in all cases, so quantum algorithms based only on correlated coherence may be stronger than those based on entanglement.

how it is stated · hedged possibility 0.62 read the record →

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arXiv ID2203.06301 (version 2)
Pith IDKDRLN4AX, Pith's permanent record of this paper and its review
CitationMerynilda Ferreira, Moises Rojas, Onofre Rojas. "Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction." arXiv:2203.06301 (2022). https://pith.science/paper/KDRLN4AX
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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,196 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.15 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.12 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

In this work, we study the thermal quantum coherence and fidelity in a semiconductor double quantum dot. The device consists of a single electron in a double quantum dot with Rashba spin-orbit coupling in the presence of an external magnetic field. In our scenario, the thermal entanglement of the single electron is driven by the charge and spin qubits, the latter controlled by Rashba coupling. Analytical expressions are obtained for thermal concurrence and correlated coherence using the density matrix formalism. The main goal of this work is to provide a good understanding of the effects of temperature and several parameters in quantum coherence. In addition, our findings show that we can use the Rashba coupling to tune in the thermal entanglement, quantum coherence, as well as, the thermal fidelity behavior of the system. Moreover, we focus on the role played by thermal entanglement and correlated coherence responsible for quantum correlations. We observe that the correlated coherence is more robust than the thermal entanglement in all cases, so quantum algorithms based only on correlated coherence may be stronger than those based on entanglement.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 In this work, we study the thermal quantum coherence and fidelity in a semiconductor double quantum dot. contribution 0.99 0.86 0.03 asserted 0.67
s1 The device consists of a single electron in a double quantum dot with Rashba spin-orbit coupling in the presence of an external magnetic field. method 0.67 0.16 0.02 asserted 0.99
s2 In our scenario, the thermal entanglement of the single electron is driven by the charge and spin qubits, the latter controlled by Rashba coupling. contribution 0.43 0.48 0.06 asserted 1.00
s3 Analytical expressions are obtained for thermal concurrence and correlated coherence using the density matrix formalism. method 0.96 0.94 0.04 asserted 1.00
s4 The main goal of this work is to provide a good understanding of the effects of temperature and several parameters in quantum coherence. contribution 0.92 0.41 0.06 asserted 0.78
s5 In addition, our findings show that we can use the Rashba coupling to tune in the thermal entanglement, quantum coherence, as well as, the thermal fidelity behavior of the system. result 0.96 0.94 0.35 asserted 0.77
s6 Moreover, we focus on the role played by thermal entanglement and correlated coherence responsible for quantum correlations. contribution 0.95 0.66 0.07 asserted 0.60
s7 We observe that the correlated coherence is more robust than the thermal entanglement in all cases, so quantum algorithms based only on correlated coherence may be stronger than those based on entanglement. interpretation 0.57 0.94 0.58 hedged possibility 0.62

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.99.

What was examined, and what was not

sources read
  • arXiv listing abstract v2
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

In this work, we study the thermal quantum coherence and fidelity in a semiconductor double quantum dot. The device consists of a single electron in a double quantum dot with Rashba spin-orbit coupling in the presence of an external magnetic field. In our scenario, the thermal entanglement of the single electron is driven by the charge and spin qubits, the latter controlled by Rashba coupling. Analytical expressions are obtained for thermal concurrence and correlated coherence using the density matrix formalism. The main goal of this work is to provide a good understanding of the effects of temperature and several parameters in quantum coherence. In addition, our findings show that we can use the Rashba coupling to tune in the thermal entanglement, quantum coherence, as well as, the thermal fidelity behavior of the system. Moreover, we focus on the role played by thermal entanglement and correlated coherence responsible for quantum correlations. We observe that the correlated coherence is more robust than the thermal entanglement in all cases, so quantum algorithms based only on correlated coherence may be stronger than those based on entanglement.

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2 arXiv papers cite this in 2 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

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Cites it as background 1 paper
  • Quantum correlations have been studied in many quantum systems, such as Heisenberg spin chain models (for instance, spin-1 Heisenberg chains [ref] , anisotropic spin-1/2 XY chain in transverse magnetic field [ref] ) and quantum dot systems such as two coupled double quantum dots systems [ref] and double quantum dot system with single electron under Rashba interaction [ref] ).

    Intrinsic decoherence effects on correlated coherence and quantum discord in XXZ Heisenberg model · Introduction · 0.92

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