Nondestructive single-photon trigger

Howell, John C.; Yeazell, John A.

doi:10.1103/physreva.62.032311

Cited by 49 publications

(29 citation statements)

References 16 publications

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“…18,19 In a QND measurement, the signal photons are not destroyed and can be reused if required. 20 The photon number QND measurement is in princple achieved using a simple cross-Kerr nonlinearity 17,21 given by…”

Section: Single-photon Qnd Detectormentioning

confidence: 99%

Toward quantum information processing using EIT in diamond

et al. 2006

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We describe how a quantum non-demolition device based on electromagnetically-induced transparency in solidstate atom-like systems could be realized. Such a resource, requiring only weak optical nonlinearities, could potentially enable photonic quantum information processing (QIP) that is much more efficient than QIP based on linear optics alone. As an example, we show how a parity gate could be constructed. A particularly interesting physical system for constructing devices is the nitrogen-vacancy defect in diamond, but the excited-state structure for this system is unclear in the existing literature. We include some of our latest spectroscopic results that indicate that the optical transitions are generally not spin-preserving, even at zero magnetic field, which allows the realization of a Λ-type system.

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Section: Single-photon Qnd Detectormentioning

confidence: 99%

Toward quantum information processing using EIT in diamond

et al. 2006

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“…[ 7 ] Moreover, the rapid development in quantum computation and communication has rendered further interest in the production and investigation of entangled resources. In such a context, a large number of theoretical as well as experimental schemes have been proposed for generating the entangled states based on photonic [ 8,9 ] and atomic [ 10,11 ] qubits as well as qudit [ 12 ] and infinite dimensional [ 13,14 ] states. With the advent of the newer applications of entanglement, it has become extremely important to quantify the amount of entanglement.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Quantum Correlation of Quasi‐Werner State and Probing Its Suitability for Quantum Teleportation

2021

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The significance of photon addition in engineering the single‐ and two‐mode (bipartite correlations) nonclassical properties of a quantum state is investigated. Specifically, the behavior of the Wigner function of two quasi‐Werner states constructed by superposing two normalized bipartite m‐photon added coherent states are analyzed. This allows the authors' to quantify the nonclassicality present in the quantum states using Wigner logarithmic negativity (WLN), while quantum correlations are measured using concurrence, entanglement of formation, and quantum discord. The WLN for a two‐mode state corresponds to the sum of the single‐mode nonclassicality and quantum correlations, and both of these are observed to enhance with photon addition manifesting the efficacy of photon addition in the entanglement distillation. Usefulness of photon addition is further established by showing that the performance of the quasi‐Werner states as quantum channel for the teleportation of single‐mode coherent and squeezed states, as quantified via teleportation fidelity, improves with the photon addition. The non‐Gaussian operation is shown effective in stalling the detrimental effects of transmission through noisy channel and/or inefficient detection under realistic scenario. Further, in contrast to a set of existing results, it is established that the negative values of two‐mode Wigner function is not a witness of quantum correlation.

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Section: Introductionmentioning

confidence: 99%