Environment-induced quantum correlations in a driven two-qubit system

Li, Junqi; Liu, Jian; Liang, Jin

doi:10.1088/0031-8949/85/06/065008

Cited by 7 publications

(5 citation statements)

References 74 publications

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“…Several varying results are obtained showing the partial and maximal quantum correlations generation along with the entropy suppression. For this sake, various types of physical models have been proposed previously [72][73][74][75] . However, we find the states either undergoing losses or resulting in partial non-classical correlations generation.…”

Section: Deviation Between the Inclusive Measuresmentioning

confidence: 99%

Extremal quantum correlation generation using a hybrid channel

Rahman,

Ali,

Zangi

et al. 2023

Sci Rep

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The preservation of quantum correlations requires optimal procedures and the proper design of the transmitting channels. In this regard, we address designing a hybrid channel comprising a single-mode cavity accompanied by a super-Gaussian beam and local dephasing parts based on the dynamics of quantum characteristics. We choose two-level atoms and various functions such as traced-distance discord, concurrence, and local-quantum uncertainty to analyze the effectiveness of the hybrid channel to preserve quantum correlations along with entropy suppression discussed using linear entropy. The joint configuration of the considered fields is found to not only preserve but also generate quantum correlations even in the presence of local dephasing. Most importantly, within certain limits, the proposed channel can be readily regulated to generate maximal quantum correlations and complete suppression of the disorder. Besides, compared to the individual parts, mixing the Fock state cavity, super-Gaussian beam, and local dephasing remains a resourceful choice for the prolonged quantum correlations’ preservation. Finally, we present an interrelationship between the considered two-qubit correlations’ functions, showing the deviation between each two correlations and of the considered state from maximal entanglement under the influence of the assumed hybrid channel.

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Section: Deviation Between the Inclusive Measuresmentioning

confidence: 99%

Extremal quantum correlation generation using a hybrid channel

Rahman,

Ali,

Zangi

et al. 2023

Sci Rep

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“…The effect of such coupling would be to create coherences and quantum correlations between the two donors. [46][47][48] In the present case, right from the outset, we assume the presence of quantum coherences and correlations between the donors and so coupling to a common mode can serve only to quantitatively modify these coherences and the exciton transfer rates without leading to any new or qualitatively different effect. 23 We choose therefore to avoid this additional technicality in the interest of keeping our discussion simple.…”

Section: Fret With Multiple Donors and Coherencementioning

confidence: 99%

A simple model for exploring the role of quantum coherence and the environment in excitonic energy transfer

Manikandan

Shaji

2015

Phys. Chem. Chem. Phys.

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We investigate the role of quantum coherence in modulating the energy transfer rate between two independent energy donors and a single acceptor participating in an excitonic energy transfer process. The energy transfer rate depends explicitly on the nature of the initial coherent superposition state of the two donors and we connect it to the observed absorption profile of the acceptor and the stimulated emission profile of the energy donors. We consider simple models with mesoscopic environments interacting with the donors and the acceptor and compare the expression we obtained for the energy transfer rate with the results of numerical integration.

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“…[52][53][54][55][56]. Moreover, investigations of systems in relativistic motion [57][58][59] or subjects to classical, chaotic, thermal, and other kinds of noise environments were also reported [60][61][62][63][64][65][66][67][68][69][70][71]. Studies considering interesting physical systems like quantum dots [72,73], atoms interacting with separated or common cavities [74][75][76] or interacting via plasmonic waveguides [77,78] appeared in the literature.…”

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confidence: 99%

The Sudden Change Phenomenon of Quantum Discord

Céleri

Maziero

2017

Quantum Science and Technology

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Even if the parameters determining a system's state are varied smoothly, the behavior of quantum correlations alike to quantum discord, and of its classical counterparts, can be very peculiar, with the appearance of non-analyticities in its rate of change. Here we review this sudden change phenomenon (SCP) discussing some important points related to it: Its uncovering, interpretations, and experimental verifications, its use in the context of the emergence of the pointer basis in a quantum measurement process, its appearance and universality under Markovian and non-Markovian dynamics, its theoretical and experimental investigation in some other physical scenarios, and the related phenomenon of double sudden change of trace distance discord. Several open questions are identified, and we envisage that in answering them we will gain significant further insight about the relation between the SCP and the symmetry-geometric aspects of the quantum state space.

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Environment-induced quantum correlations in a driven two-qubit system

Cited by 7 publications

References 74 publications

Extremal quantum correlation generation using a hybrid channel

Extremal quantum correlation generation using a hybrid channel

A simple model for exploring the role of quantum coherence and the environment in excitonic energy transfer

The Sudden Change Phenomenon of Quantum Discord

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