Scheme for secure swapping two unknown states of a photonic qubit and an electron-spin qubit using simultaneous quantum transmission and teleportation via quantum dots inside single-sided optical cavities

Heo, Jino; Kang, Min-Sung; Hong, Chang-Ho; Choi, Seong-Gon; Hong, Jong-Phil

doi:10.1016/j.physleta.2017.01.052

Cited by 18 publications

(40 citation statements)

References 57 publications

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“…where γ/2 is the HWHM radiative linewidth and κ is the cavity loss rate for the relevant mode. Thus, inserting the transformed Hamiltonian from equations (4), (5) and (6), the variational master equation takes the form…”

Section: Master Equationmentioning

confidence: 99%

Solid-state emitter embedded in a microcavity under intense excitation: A variational master-equation approach

Gómez-Sánchez

Ramírez

2018

Phys. Rev. A

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In this work, dissipative effects from a phonon bath on the resonance fluorescence of a solid-state two level system embedded in a high quality semiconductor microcavity and driven by an intense laser, are investigated. Within the density operator formalism, we derive a variational master equation valid for broader ranges of temperatures, pumping rates, and radiation-matter couplings, than previous studies. From the obtained master equation, fluorescence spectra for various thermal and exciting conditions are numerically calculated, and compared to those computed from weak coupling and polaronic master equations, respectively. Our results evidence the breakdown of those rougher approaches under increased temperature and strong pumping. arXiv:1611.05532v3 [cond-mat.mes-hall]

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Section: Master Equationmentioning

confidence: 99%

Solid-state emitter embedded in a microcavity under intense excitation: A variational master-equation approach

Gómez-Sánchez

Ramírez

2018

Phys. Rev. A

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“…Entanglement is significantly involved in quantum information processing schemes, such as quantum communications 1 – 3 , quantum computations 4 – 6 , and quantum networks 7 – 9 . Feasible and efficient quantum information processing schemes depend on the experimental suitability of realization and the efficient conservation of the correlations in entangled states.…”

Section: Introductionmentioning

confidence: 99%

Distribution of hybrid entanglement and hyperentanglement with time-bin for secure quantum channel under noise via weak cross-Kerr nonlinearity

Heo

Kang

Hong³

et al. 2017

Sci Rep

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We design schemes to generate and distribute hybrid entanglement and hyperentanglement correlated with degrees of freedom (polarization and time-bin) via weak cross-Kerr nonlinearities (XKNLs) and linear optical devices (including time-bin encoders). In our scheme, the multi-photon gates (which consist of XKNLs, quantum bus [qubus] beams, and photon-number-resolving [PNR] measurement) with time-bin encoders can generate hyperentanglement or hybrid entanglement. And we can also purify the entangled state (polarization) of two photons using only linear optical devices and time-bin encoders under a noisy (bit-flip) channel. Subsequently, through local operations (using a multi-photon gate via XKNLs) and classical communications, it is possible to generate a four-qubit hybrid entangled state (polarization and time-bin). Finally, we discuss how the multi-photon gate using XKNLs, qubus beams, and PNR measurement can be reliably performed under the decoherence effect.

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“…But this resource exponentially reduces the transmission rate because of optical absorption and noise in the channel (short coherence time). On the other hand, the QD-cavity system 16 , 19 – 30 has received a lot of attention for the storage of quantum information in solid-state quantum systems due to the long electron–spin coherence time ( ) 31 – 36 within a limited spin relaxation time ( ) 37 – 40 . Furthermore, other research 19 , 20 , 40 – 50 showed that operations on a single QD spin and preparations for the electron spin state have been developed.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, other research 19 , 20 , 40 – 50 showed that operations on a single QD spin and preparations for the electron spin state have been developed. Therefore, the various quantum information processing schemes that employ interactions of the photons (fast transferring) and QD-cavity systems (long coherence time), were designed for quantum communications (including quantum teleportation and quantum networks) 16 , 29 , 51 – 59 , quantum controlled operations 24 , 60 – 65 , and the analysis and generation of entanglement 21 – 23 , 30 , 66 .…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we propose a CQT scheme, consisting of an arbitrator (Trent) and two users (Alice and Bob), using the interactions of photons and QDs inside one double-sided and two single-sided optical cavities. Trent, having the QD-cavity system (a single-side cavity) 16 , 19 – 22 , 24 , 30 , takes the roles of a provider (for the authenticated entanglement channel) and of a controller (for recovering the unknown state). When Trent constructs the entanglement channel, which consists of one electron spin in a QD-cavity system (belonging to Trent) and two photons (transferred to users), Alice and Bob can activate the QT protocol.…”

Section: Introductionmentioning

confidence: 99%

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Implementation of controlled quantum teleportation with an arbitrator for secure quantum channels via quantum dots inside optical cavities

Heo

Hong²,

Kang

et al. 2017

Sci Rep

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We propose a controlled quantum teleportation scheme to teleport an unknown state based on the interactions between flying photons and quantum dots (QDs) confined within single- and double-sided cavities. In our scheme, users (Alice and Bob) can teleport the unknown state through a secure entanglement channel under the control and distribution of an arbitrator (Trent). For construction of the entanglement channel, Trent utilizes the interactions between two photons and the QD-cavity system, which consists of a charged QD (negatively charged exciton) inside a single-sided cavity. Subsequently, Alice can teleport the unknown state of the electron spin in a QD inside a double-sided cavity to Bob’s electron spin in a QD inside a single-sided cavity assisted by the channel information from Trent. Furthermore, our scheme using QD-cavity systems is feasible with high fidelity, and can be experimentally realized with current technologies.

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Scheme for secure swapping two unknown states of a photonic qubit and an electron-spin qubit using simultaneous quantum transmission and teleportation via quantum dots inside single-sided optical cavities

Cited by 18 publications

References 57 publications

Solid-state emitter embedded in a microcavity under intense excitation: A variational master-equation approach

Solid-state emitter embedded in a microcavity under intense excitation: A variational master-equation approach

Distribution of hybrid entanglement and hyperentanglement with time-bin for secure quantum channel under noise via weak cross-Kerr nonlinearity

Implementation of controlled quantum teleportation with an arbitrator for secure quantum channels via quantum dots inside optical cavities

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