Logical measurement-based quantum computation in circuit-QED

Joo, Jaewoo; Lee, Chang-Woo; Kono, Shingo; Kim, Jaewan

doi:10.1038/s41598-019-52866-3

Cited by 11 publications

(8 citation statements)

References 62 publications

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“…Preparatory work on generalizing graph states, implicitly including the cluster-state special case, to qudit graph states has been reported [85]. Regarding implement, qudit-based approaches have only been reported for the error-correction aspect of measurement-based qubit quantum computing [82]. In this approach, the cluster state is envisioned as comprising qudits, with the high-dimensional nature of qudits serving to encode qubits for error correction.…”

Section: Measurement-based Qudit Computingmentioning

confidence: 99%

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Qudits and High-Dimensional Quantum Computing

et al. 2020

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Section: Measurement-based Qudit Computingmentioning

confidence: 99%

“…In this approach, the cluster state is envisioned as comprising qudits, with the high-dimensional nature of qudits serving to encode qubits for error correction. They propose continuous-variable realizations of a qudit cluster state in a continuous-variable setting [82].…”

Section: Measurement-based Qudit Computingmentioning

confidence: 99%

Qudits and High-Dimensional Quantum Computing

et al. 2020

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“…It has been proposed that 3D cavities interacting with transmon can create a superposition of two arbitrary states in two cavities, a quantum adder phenomenon for quantum information processing [17,18]. Furthermore, the coupled system of superconducting qubit and 3D cavities offer excellent capabilities for creating quantum cavity states through the nonlinearly of intermediary qubits [19,20,21,22,23]. In this manuscript, we briefly review the current status of superconducting resonators and research towards the development of 3D resonators in order to increase the qubit coherence time.…”

Section: Introductionmentioning

confidence: 99%

Superconducting Radio Frequency Resonators for Quantum Computing: A Short Review

Dhakal

2021

J. Nep. Phys. Soc.

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Superconducting radiofrequency (SRF) technology is being used not only in discovery science programs and basic research but also for several applications that benefit society more directly. The advantage of superconducting resonators over those made of normal-conducting metal is their ability to store electromagnetic energy with much lower dissipation. The high-quality factor and longer dissipation time provided by these superconducting resonators can deliver superior performance. Currently, the quantum processing architecture uses resonators and interconnecting circuits operating in the microwave regime with superconducting strip-line technology and low noise electronic devices for switching and communication. The performance of these devices can be enhanced by embedding them in 3D SRF cavity resonators to prolong the coherence time, which improves the utility of the device by reducing error rates and allowing more manipulations (calculations) before the quantum state decays. Here, we present a short review of current microwave technology used in quantum computers and progress towards the 3D resonators to enhance thecoherence time.

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“…The new and rapidly growing field of circuit QED, consisting of microwave radiation fields and fixed artificial atoms, offers extremely exciting prospects for solid-state QIP [20][21][22][23][24][25][26][27][28]. In the following, we will present an approach to transfer the entangled state (1) between n SPS qubits and n CS qubits, in a circuit QED system that consists of 2n microwave cavities coupled to a superconducting flux qutrit.…”

Section: Introductionmentioning

confidence: 99%

Transferring quantum entangled states between multiple single-photon-state qubits and coherent-state qubits in circuit QED

Zhang

Yang

2021

Preprint

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We present a way to transfer maximally-or partially-entangled states of n single-photon-state (SPS) qubits onto n coherent-state (CS) qubits, by employing 2n microwave cavities coupled to a superconducting flux qutrit. The two logic states of a SPS qubit here are represented by the vacuum state and the single-photon state of a cavity, while the two logic states of a CS qubit are encoded with two coherent states of a cavity. Because of using only one superconducting qutrit as the coupler, the circuit architecture is significantly simplified. The operation time for the state transfer does not increase with the increasing of the number of qubits. When the dissipation of the system is negligible, the quantum state can be transferred in a deterministic way since no measurement is required. Furthermore, the higher-energy intermediate level of the coupler qutrit is not excited during the entire operation and thus decoherence from the qutrit is greatly suppressed.As a specific example, we numerically demonstrate that the high-fidelity transfer of a Bell state of two SPS qubits onto two CS qubits is achievable within the present-day circuit QED technology.Finally, it is worthy to note that when the dissipation is negligible, entangled states of n CS qubits can be transferred back onto n SPS qubits by performing reverse operations. This proposal is quite general and can be extended to accomplish the same task, by employing a natural or artificial atom to couple 2n microwave or optical cavities.

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Logical measurement-based quantum computation in circuit-QED

Cited by 11 publications

References 62 publications

Qudits and High-Dimensional Quantum Computing

Qudits and High-Dimensional Quantum Computing

Superconducting Radio Frequency Resonators for Quantum Computing: A Short Review

Transferring quantum entangled states between multiple single-photon-state qubits and coherent-state qubits in circuit QED

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