Generating entanglement between quantum dots with different resonant frequencies based on dipole-induced transparency

Sridharan, Deepak; Waks, Edo

doi:10.1103/physreva.78.052321

Cited by 20 publications

(22 citation statements)

References 38 publications

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“…Using the linearization of the Heisenberg-Langevin equations, a type of dipole-induced transparency (DIT) can be well described [31,32], which is an analog of electromagnetically induced transparency (EIT) in atomic system [36][37][38][39]. Such a procedure by ignoring these nonlinear terms has been commonly adopted in many previous studies [40][41][42][43][44][45][46][47][48][49]. In the present work, we take into account the bichromatic driving field consisting of a cw control field and a cw probe field as well as the strong-coupling condition.…”

Section: Numerical Results and Discussion About High-order Sidementioning

confidence: 99%

Dipole-induced high-order sideband comb employing a quantum dot strongly coupled to a photonic crystal cavity via a waveguide

2014

Phys. Rev. B

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We propose a scheme for high-order sideband generation (HSG) by utilizing strong coupling between a single quantum dot (QD) and a photonic crystal cavity beyond the weak-excitation approximation. Here the hybrid system is coherently driven by an external bichromatic field consisting of a continuous-wave (cw) control field and a cw probe field. We take account of nonlinear terms in the Heisenberg-Langevin equations, i.e., the nonlinear nature of the QD, and give an effective method to deal with such a problem. It is shown, due to the presence of nonlinear terms, that the HSG with large intensities can be realized with experimentally achievable system parameters. This investigation may provide further insight into the understanding of solid-state cavity quantum electrodynamics system and find applications in optical comb and communication in a photonic crystal platform. In addition, the present theory can also be applied to other similar systems, such as a single quantum emitter positioned close to a microtoroidal resonator with the whispering-gallery-mode fields propagating inside the resonator.

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Section: Numerical Results and Discussion About High-order Sidementioning

confidence: 99%

Dipole-induced high-order sideband comb employing a quantum dot strongly coupled to a photonic crystal cavity via a waveguide

2014

Phys. Rev. B

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“…Entangling quantum dot spin with a flying photon could enable photon mediated entanglement between spatially separated quantum dot spin qubits [14,92] as well as other matter qubits [93] for creating hybrid quantum systems. These capabilities could ultimately lead to realization of long distance quantum networks [1,2] and distributive quantum computation [3].…”

Section: Discussionmentioning

confidence: 99%

Nanophotonic Quantum Interface for a Single Solid-state Spin

Sun

Kim

Solomon

et al. 2016

Conference on Lasers and Electro-Optics

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The ability to store and transmit quantum information plays a central role in virtually all quantum information processing applications. Single spins serve as pristine quantum memories whereas photons are ideal carriers of quantum information. Strong interactions between these two systems provide the necessary interface for developing future quantum networks and distributed quantum computers.They also enable a broad range of critical quantum information functionalities such as entanglement distribution, non-destructive quantum measurements and strong photon-photon interactions. Realizing spin-photon interactions in a solid-state device is particularly desirable because it opens up the possibility of chip-integrated quantum circuits that support gigahertz bandwidth operation.In this thesis, I demonstrate a nanophotonic quantum interface between a single solid-state spin and a photon, and explore its applications in quantum information processing. First, we experimentally realize a spin-photon quantum phase switch based on a strongly coupled quantum dot and photonic crystal cavity system. This device enables coherent light-matter interactions at the fundamental limit, where a single spin controls the polarization of a photon and a single photon flips the spin state. Furthermore, we theoretically propose a way to deterministically generate spin-photon entanglement based on the spin-photon quantum interface, which is an important step towards solid-state implementations of quantum repeaters and quantum networks. Next, we show both theoretically and experimentally, a new method to optically read out a solid-state spin based on the same cavity quantum electrodynamics (QED) system. This new method achieves significant improvement in spin readout fidelity over typical approaches using fluorescence light detection.In the end, we report efforts to realize tunable and robust quantum dot based cavity QED systems. We present a technique for tuning the frequency of a quantum dot that is strongly coupled to a photonic crystal cavity by applying strain. This tuning technique enables us to accurately control the detuning between a quantum dot and a cavity without affecting other emission properties of the dot, which is essential for lots of applications associated with cavity QED systems, including non-classical light generation, photon blockade, single photon level optical switch, and also our major focus, the spin-photon quantum interface.

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“…All of our calculations so far assumed that the atom and cavity-QD system are driven with sufficiently weak excitation such that σ z → −1, where σ z is the population inversion operator. For the QD, it has been previously shown that the weak emission lifetime of the QD [11]. For any N ref one can in principle satisfy weak excitation by make τ p sufficiently long.…”

Section: Validity Of Weak Excitation Limitmentioning

confidence: 99%

“…Photon mediated entanglement has been proposed for entangling like systems such as atoms [6,8], NV centers in diamond [9], and cavity-coupled QDs [10,11]. It has been experimentally demonstrated between electrostatically trapped ions [12] and atomic ensembles [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Protocol for hybrid entanglement between a trapped atom and a quantum dot

Waks

Monroe

2009

Phys. Rev. A

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We propose a quantum optical interface between an atomic and solid state system. We show that quantum states in a single trapped atom can be entangled with the states of a semiconductor quantum dot through their common interaction with a classical laser field. The interference and detection of the resulting scattered photons can then herald the entanglement of the disparate atomic and solid-state quantum bits. We develop a protocol that can succeed despite a significant mismatch in the radiative characteristics of the two matter-based qubits. We study in detail a particular case of this interface applied to a single trapped 171 Yb + ion and a cavity-coupled InGaAs semiconductor quantum dot. Entanglement fidelity and success rates are found to be robust to a broad range of experimental nonideal effects such as dispersion mismatch, atom recoil, and multi-photon scattering. We conclude that it should be possible to produce highly entangled states of these complementary qubit systems under realistic experimental conditions. PACS numbers: Valid PACS appear here 1 arXiv:0907.0444v1 [quant-ph]

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Generating entanglement between quantum dots with different resonant frequencies based on dipole-induced transparency

Cited by 20 publications

References 38 publications

Dipole-induced high-order sideband comb employing a quantum dot strongly coupled to a photonic crystal cavity via a waveguide

Dipole-induced high-order sideband comb employing a quantum dot strongly coupled to a photonic crystal cavity via a waveguide

Nanophotonic Quantum Interface for a Single Solid-state Spin

Protocol for hybrid entanglement between a trapped atom and a quantum dot

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