Remote Individual Addressing of Quantum Emitters with Chirped Pulses

Casulleras, Silvia; Gonzalez-Ballestero, Carlos; Maurer, Patrick; García-Ripoll, Juan José; Romero‐Isart, Oriol

doi:10.1103/physrevlett.126.103602

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…In light of the reported results, we believe that quantum networks made of superconducting qubits and wavguides constitute a promising platform to implement quantum operations on both long-distant (inter-node) and short-distance (intranode) quantum processors. Furthermore, we expect further theoretical developments, such as chirping [52] and quantum control [35,36], to overcome the limitations induced by propagation and Stark shifts, and to further optimize the speed of state transfer. Now, for the case of propagation, we can expand the dispersion relation up to second order in the vicinity of the central frequency ω c ,…”

Section: Discussionmentioning

confidence: 99%

Universal deterministic quantum operations in microwave quantum links

Peñas,

Puebla,

Ramos

et al. 2021

Preprint

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We propose a realistic setup, inspired by already existing experiments [1], within which we develop a general formalism for the implementation of distributed quantum gates. Mediated by a quantum link that establishes a bidirectional quantum channel between distant nodes, our proposal works both for inter-and intra node communication and handles scenarios ranging from the few to the many modes limit of the quantum link. We are able to design fast and reliable state transfer protocols in every regime of operation, which, together with a detailed description of the scattering process, allows us to engineer two sets of deterministic universal distributed quantum gates. Gates whose implementation in quantum networks does not need entanglement distribution nor measurements. By employing a realistic description of the physical setup we identify the most relevant imperfections in the quantum links as well as optimal points of operation with resulting infidelities of 1 − F ≈ 10 −2 − 10 −3 .

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Section: Discussionmentioning

confidence: 99%

Universal deterministic quantum operations in microwave quantum links

Peñas,

Puebla,

Ramos

et al. 2021

Preprint

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“…Regarding the first factor, Peñas et al [23] showed that the curvature of the dispersion relation in a quantum link sets stringent bounds on the ultimate state transfer fidelity. This affects potentially many experiments with microwave guides [17,18], photonic crystals [24,25] or spin waves [26,27]. As for the non-Markovian effects [28,29], these arise in the chirping of qubit-photon couplings, and manifest in distortions of the emitted wavepackets, which deviate from the predictions of the usual input-output theory.…”

Section: Introductionmentioning

confidence: 99%

Improving quantum state transfer: correcting non-Markovian and distortion effects

Peñas,

Puebla,

José García-Ripoll

2023

Quantum Sci. Technol.

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Quantum state transfer is a key operation for quantum information processing. The original pitch-and-catch protocols rely on flying qubits or single photons with engineered wavepacket shapes to achieve a deterministic, fast and high-fidelity transfer. Yet, these protocols overlook two important factors, namely, the distortion of the wavepacket during the propagation and non-Markovian effects during the emission and reabsorption processes due to time-dependent controls. Here we address both difficulties in a general quantum-optical model and propose a correction strategy to improve quantum state transfer protocols. Including non-Markovian effects in our theoretical description, we show how to derive control pulses that imprint phases on the wavepacket that compensate the distortion caused by propagation. Our theoretical results are supported by detailed numerical simulations showing that a suitable correction strategy can improve state transfer fidelities up to three orders of magnitude.

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“…[18,19] Specifically, a method was proposed and theoretically investigated for obtaining rectangular pulses. [20,21] This method relied on coherent control and free induction decay of low-frequency oscillations in nonlinear media. The quantum entanglement, maximum fidelity, quantum Fisher information, and the analytical spectrum formula of the rectangular pulses have been studied in detail.…”

Section: Introductionmentioning

confidence: 99%

Noise‐Based Damping of Chaotic Entanglement in Pulsed Driven Two‐Qubit System

Abd‐Rabbou,

Khalil,

Al‐Awfi

2023

Annalen der Physik

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This paper investigates the entanglement dynamics of a two‐qubit system in the presence of n‐sequential sin 2‐pulse shape. The study explores entanglement under two scenarios: when the system is completely isolated from the environment and when it interacts with one of the surrounding environments, namely the thermal environment and the common dephasing environment. The authors quantify entanglement through concurrence while systematically examining the effects of initial state preparation, qubit coupling strength, laser‐qubit interaction intensity, pulse sequences, and decohering environments. The results highlight that the entanglement of the two‐qubit system strongly depends on the initial state. Increasing the coupling strength between the qubits and the n‐sequential pulse enhances the maximum values of entanglement. Conversely, augmenting the laser‐qubits coupling or introducing the influence of the environment diminishes the entanglement.

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Remote Individual Addressing of Quantum Emitters with Chirped Pulses

Cited by 6 publications

References 41 publications

Universal deterministic quantum operations in microwave quantum links

Universal deterministic quantum operations in microwave quantum links

Improving quantum state transfer: correcting non-Markovian and distortion effects

Noise‐Based Damping of Chaotic Entanglement in Pulsed Driven Two‐Qubit System

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