Analyzing photon-count heralded entanglement generation between solid-state spin qubits by decomposing the master-equation dynamics

Wein, Stephen C.; Ji, Jia-Wei; Yu-feng, WU; Asadi, Faezeh Kimiaee; Ghobadi, Roohollah; Simon, Christoph

doi:10.1103/physreva.102.033701

Cited by 18 publications

(16 citation statements)

References 70 publications

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“…This section is dedicated to the basic structure and components of our proposed architecture. We start with the introduction to the spin-optomechanics interface [31], and then quantify the efficiency and fidelity of entan-glement generation between two remote nodes based on the recently developed photon number decomposition method [37]. Then we discuss entanglement storage and swapping under ambient conditions.…”

Section: Quantum Repeater Architecturementioning

confidence: 99%

“…In order to quantify the entanglement fidelity and efficiency, we follow the photon number decomposition method developed in [37] to compute the time dynamics. Due to the existing mechanically-induced cavity emission at room temperature, the initial state of the cavity is not perfectly the vacuum state.…”

Section: Fig 3 Entanglement Generation Fidelity Fgen and Efficiencymentioning

confidence: 99%

“…3. Since this thermal occupation is so small, and it does not affect the quantum system dynamics significantly, we can treat its contributions classically by modelling it as dark counts to simplify the calculations [37]. This dark count rate is given by D th = κ 1 κ 2 /(κ 1 −κ 2 ).…”

Section: Fig 3 Entanglement Generation Fidelity Fgen and Efficiencymentioning

confidence: 99%

“…In our proposal the entanglement between two distant NV electron spins is established via photons following the Barrett-Kok scheme [25,35,36]. We apply the photon number decomposition method [37] to quantify and analyze the entanglement generation efficiency and fidelity. Mapping of the electron spin entanglement onto nuclear spins is achieved via performing CNOT gates and electron spin readout through the spin-optomechanics interface.…”

Section: Introductionmentioning

confidence: 99%

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Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics

Ji¹,

Wu²,

Wein³

et al. 2020

Preprint

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We propose a quantum repeater architecture that can operate under ambient conditions. Our proposal builds on recent progress towards non-cryogenic spin-photon interfaces based on nitrogenvacancy centers, which have excellent spin coherence times even at room temperature, and optomechanics, which allows to avoid phonon-related decoherence and also allows the emitted photons to be in the telecom band. We apply the photon number decomposition method to quantify the fidelity and the efficiency of entanglement established between two remote electron spins. We describe how the entanglement can be stored in nuclear spins and extended to long distances via quasi-deterministic entanglement swapping operations involving the electron and nuclear spins. We furthermore propose schemes to achieve high-fidelity readout of the spin states at room temperature using the spin-optomechanics interface. Our work shows that long-distance quantum networks made of solid-state components that operate at room temperature are within reach of current technological capabilities.

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Section: Quantum Repeater Architecturementioning

confidence: 99%

Section: Fig 3 Entanglement Generation Fidelity Fgen and Efficiencymentioning

confidence: 99%

Section: Fig 3 Entanglement Generation Fidelity Fgen and Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics

Ji¹,

Wu²,

Wein³

et al. 2020

Preprint

Self Cite

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“…In the SNSPD with good enough control electronics, there are no effects associated with previous triggers [9]. That is, we can consider all processes as Markovian [10]. There is a "memory" of earlier triggers in SPAD-based SPDs -the processes has more complicate influence on counting statistics [11], and the construction of a global SPD model becomes complicated.…”

Section: Introductionmentioning

confidence: 99%

Dead time duration and active reset influence on the afterpulse probability of InGaAs/InP single-photon avalanche diodes

Losev,

Zavodilenko,

Koziy

et al. 2021

Preprint

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We perform the detailed study of the afterpulse probability's dependence in the InGaAs/InP sine-gated SPAD on the dead time and the used approach for its implementation. We have found that the comparator's simple latching can significantly reduce afterpulses' probability, even without using a dead time pulse that lowers the diode bias voltage. We have found that with a low probability of afterpulse (< 5 %) or with a large dead time (τ > 10 µs), it is sufficient to use a circuit with latching of the comparator, which will significantly simplify the development of an SPD device for applications in which such parameters are acceptable. We also proposed a precise method for measuring and the afterpulse and presented a model describing the recurrent nature of this effect. We have shown that it should not use a simple model to describe the afterpulse probability due to rough underlying physical processes. A second-order model is preferable.

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High-rate entanglement between a semiconductor spin and indistinguishable photons

et al. 2023

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Analyzing photon-count heralded entanglement generation between solid-state spin qubits by decomposing the master-equation dynamics

Cited by 18 publications

References 70 publications

Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics

Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics

Dead time duration and active reset influence on the afterpulse probability of InGaAs/InP single-photon avalanche diodes

High-rate entanglement between a semiconductor spin and indistinguishable photons

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