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  1. Artikel ; Online: Commentary: Increasing nursing and midwifery research leadership: impact evaluation of the National Institute for Health and Care Research Senior Nurse and Midwife Research Leader Programme at 1 year.

    Campbell, Steve

    Journal of research in nursing : JRN

    2023  Band 28, Heft 6-7, Seite(n) 529–530

    Sprache Englisch
    Erscheinungsdatum 2023-11-22
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2173772-1
    ISSN 1744-988X ; 1744-9871
    ISSN (online) 1744-988X
    ISSN 1744-9871
    DOI 10.1177/17449871231201857
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Commentary: 'And then there was silence': shaping practice through the experience of parents' emotions.

    Ford, Karen / Campbell, Steve

    Journal of research in nursing : JRN

    2023  Band 28, Heft 8, Seite(n) 606–608

    Sprache Englisch
    Erscheinungsdatum 2023-12-27
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2173772-1
    ISSN 1744-988X ; 1744-9871
    ISSN (online) 1744-988X
    ISSN 1744-9871
    DOI 10.1177/17449871231216117
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Universally Robust Quantum Control.

    Poggi, Pablo M / De Chiara, Gabriele / Campbell, Steve / Kiely, Anthony

    Physical review letters

    2024  Band 132, Heft 19, Seite(n) 193801

    Abstract: We study the robustness of the evolution of a quantum system against small uncontrolled variations in parameters in the Hamiltonian. We show that the fidelity susceptibility, which quantifies the perturbative error to leading order, can be expressed in ... ...

    Abstract We study the robustness of the evolution of a quantum system against small uncontrolled variations in parameters in the Hamiltonian. We show that the fidelity susceptibility, which quantifies the perturbative error to leading order, can be expressed in superoperator form and use this to derive control pulses that are robust to any class of systematic unknown errors. The proposed optimal control protocol is equivalent to searching for a sequence of unitaries that mimics the first-order moments of the Haar distribution, i.e., it constitutes a 1-design. We highlight the power of our results for error-resistant single- and two-qubit gates.
    Sprache Englisch
    Erscheinungsdatum 2024-05-28
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.193801
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Correlations, Information Backflow, and Objectivity in a Class of Pure Dephasing Models.

    Megier, Nina / Smirne, Andrea / Campbell, Steve / Vacchini, Bassano

    Entropy (Basel, Switzerland)

    2022  Band 24, Heft 2

    Abstract: We critically examine the role that correlations established between a system and fragments of its environment play in characterising the ensuing dynamics. We employ a dephasing model with different initial conditions, where the state of the initial ... ...

    Abstract We critically examine the role that correlations established between a system and fragments of its environment play in characterising the ensuing dynamics. We employ a dephasing model with different initial conditions, where the state of the initial environment represents a tunable degree of freedom that qualitatively and quantitatively affects the correlation profiles, but nevertheless results in the same reduced dynamics for the system. We apply recently developed tools for the characterisation of non-Markovianity to carefully assess the role that correlations, as quantified by the (quantum) Jensen-Shannon divergence and relative entropy, as well as changes in the environmental state, play in whether the conditions for classical objectivity within the quantum Darwinism paradigm are met. We demonstrate that for precisely the same non-Markovian reduced dynamics of the system arising from different microscopic models, some exhibit quantum Darwinistic features, while others show that no meaningful notion of classical objectivity is present. Furthermore, our results highlight that the non-Markovian nature of an environment does not a priori prevent a system from redundantly proliferating relevant information, but rather it is the system's ability to establish the requisite correlations that is the crucial factor in the manifestation of classical objectivity.
    Sprache Englisch
    Erscheinungsdatum 2022-02-21
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2014734-X
    ISSN 1099-4300 ; 1099-4300
    ISSN (online) 1099-4300
    ISSN 1099-4300
    DOI 10.3390/e24020304
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Of truths, concepts and social constructions.

    Campbell, Steve

    Nurse researcher

    2015  Band 23, Heft 2, Seite(n) 6–7

    Mesh-Begriff(e) Knowledge ; Nursing Research
    Sprache Englisch
    Erscheinungsdatum 2015-12-01
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 1212516-7
    ISSN 2047-8992 ; 1351-5578
    ISSN (online) 2047-8992
    ISSN 1351-5578
    DOI 10.7748/nr.23.2.6.s2
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Commentary: Vaccine-hesitant parents' reasons for choosing alternate protection methods in Turkey.

    Campbell, Steve / Crisp, Elaine

    Journal of research in nursing : JRN

    2020  Band 26, Heft 6, Seite(n) 554–556

    Sprache Englisch
    Erscheinungsdatum 2020-12-20
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2173772-1
    ISSN 1744-988X ; 1744-9871
    ISSN (online) 1744-988X
    ISSN 1744-9871
    DOI 10.1177/1744987120971292
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Rodentizide exposure of red fox (Vulpes vulpes) in Scotland, before and after the introduction of an industry stewardship scheme

    Campbell, Steve / George, Sheila / Sharp, Elizabeth

    2023  

    Schlagwörter Text ; abstract_or_summary ; ddc:630
    Sprache Englisch
    Erscheinungsland de
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  8. Artikel ; Online: Stochastic Collisional Quantum Thermometry.

    O'Connor, Eoin / Vacchini, Bassano / Campbell, Steve

    Entropy (Basel, Switzerland)

    2021  Band 23, Heft 12

    Abstract: We extend collisional quantum thermometry schemes to allow for stochasticity in the waiting time between successive collisions. We establish that introducing randomness through a suitable waiting time distribution, the Weibull distribution, allows us to ... ...

    Abstract We extend collisional quantum thermometry schemes to allow for stochasticity in the waiting time between successive collisions. We establish that introducing randomness through a suitable waiting time distribution, the Weibull distribution, allows us to significantly extend the parameter range for which an advantage over the thermal Fisher information is attained. These results are explicitly demonstrated for dephasing interactions and also hold for partial swap interactions. Furthermore, we show that the optimal measurements can be performed locally, thus implying that genuine quantum correlations do not play a role in achieving this advantage. We explicitly confirm this by examining the correlation properties for the deterministic collisional model.
    Sprache Englisch
    Erscheinungsdatum 2021-12-06
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2014734-X
    ISSN 1099-4300 ; 1099-4300
    ISSN (online) 1099-4300
    ISSN 1099-4300
    DOI 10.3390/e23121634
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Do badgers eat lamb? Using DNA and post-mortem analysis to investigate lamb predation on Scottish farms

    George, Sheila / Campbell, Steve / Kaden, Jennifer / Hale, Catherine / Webster, Lucy

    2023  

    Schlagwörter Text ; abstract_or_summary ; ddc:630
    Sprache Englisch
    Erscheinungsland de
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  10. Buch ; Online: First Passage Times for Continuous Quantum Measurement Currents

    Kewming, Michael J. / Kiely, Anthony / Campbell, Steve / Landi, Gabriel T.

    2023  

    Abstract: The First Passage Time (FPT) is the time taken for a stochastic process to reach a desired threshold. In this letter we address the FPT of the stochastic measurement current in the case of continuously measured quantum systems. Our approach is based on a ...

    Abstract The First Passage Time (FPT) is the time taken for a stochastic process to reach a desired threshold. In this letter we address the FPT of the stochastic measurement current in the case of continuously measured quantum systems. Our approach is based on a charge-resolved master equation, which is related to the Full-Counting statistics of charge detection. In the quantum jump unravelling this takes the form of a coupled system of master equations, while for quantum diffusion it becomes a type of quantum Fokker-Planck equation. In both cases, we show that the FPT can be obtained by introducing absorbing boundary conditions, making their computation extremely efficient {and analytically tractable}. The versatility of our framework is demonstrated with two relevant examples. First, we show how our method can be used to study the tightness of recently proposed kinetic uncertainty relations (KURs) for quantum jumps, which place bounds on the signal-to-noise ratio of the FPT. Second, we study the usage of qubits as threshold detectors for Rabi pulses, and show how our method can be employed to maximize the detection probability while, at the same time, minimize the occurrence of false positives.

    Comment: 8 pages, 2 figures
    Schlagwörter Quantum Physics
    Thema/Rubrik (Code) 612
    Erscheinungsdatum 2023-08-15
    Erscheinungsland us
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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