Temporal-mode continuous-variable three-dimensional cluster state for topologically protected measurement-based quantum computation

Fukui, Kosuke; Asavanant, Warit; Furusawa, Akira

doi:10.1103/physreva.102.032614

Cited by 29 publications

(36 citation statements)

References 44 publications

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“…The Gaussian resource is provided by easy-to-generate CV cluster states, which are multi-mode Gaussian states [8]. There has been substantial progress in designing and deterministically generating CV cluster states in one [9][10][11], two [12][13][14][15][16], and higher dimensions [17][18][19]. In each of these architectures, the quantum information is encoded in a bosonic qubit introduced by Gottesman, Kitaev and Preskill (GKP) [20].…”

Section: Overview Of Architecturementioning

confidence: 99%

Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer

Bourassa

Alexander

Vasmer

et al. 2021

Quantum

218

202

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Photonics is the platform of choice to build a modular, easy-to-network quantum computer operating at room temperature. However, no concrete architecture has been presented so far that exploits both the advantages of qubits encoded into states of light and the modern tools for their generation. Here we propose such a design for a scalable fault-tolerant photonic quantum computer informed by the latest developments in theory and technology. Central to our architecture is the generation and manipulation of three-dimensional resource states comprising both bosonic qubits and squeezed vacuum states. The proposal exploits state-of-the-art procedures for the non-deterministic generation of bosonic qubits combined with the strengths of continuous-variable quantum computation, namely the implementation of Clifford gates using easy-to-generate squeezed states. Moreover, the architecture is based on two-dimensional integrated photonic chips used to produce a qubit cluster state in one temporal and two spatial dimensions. By reducing the experimental challenges as compared to existing architectures and by enabling room-temperature quantum computation, our design opens the door to scalable fabrication and operation, which may allow photonics to leap-frog other platforms on the path to a quantum computer with millions of qubits.

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Section: Overview Of Architecturementioning

confidence: 99%

Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer

Bourassa

Alexander

Vasmer

et al. 2021

Quantum

218

202

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show abstract

“…The promise of this technology is enabled by room-temperature functionality, manufacturability, tolerance to photon loss, and the potential for long-range networking. In this approach, the need for robust and stable optical quantum information is met by combining bosonic codes known as Gottesman-Kitaev-Preskill (GKP) qubits [1] with qubit quantum error correcting codes implemented through measurement-based quantum computation (MBQC) [2][3][4], in a hybrid continuous-variable (CV) and discretevariable (DV) architecture [5][6][7][8][9]. However, the current best architectures of this type still have critical challenges: inline squeezing in circuit or measurement-based implementations of CZ gates introduce noise [6,[9][10][11]; the requirement of deterministic GKP sources leads to onerous multiplexing costs; and the need for rapid reconfiguration in the linear optics networks is a substantial burden on integrated chips [12].…”

mentioning

confidence: 99%

Fault-tolerant quantum computation with static linear optics

Tzitrin,

Matsuura,

Alexander

et al. 2021

Preprint

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The scalability of photonic implementations of fault-tolerant quantum computing based on Gottesman-Kitaev-Preskill (GKP) qubits is injured by the requirements of inline squeezing and reconfigurability of the linear optical network. In this work we propose a topologically error-corrected architecture that does away with these elements at no cost-in fact, at an advantage-to state preparation overheads. Our computer consists of three modules: a 2D array of probabilistic sources of GKP states; a depth-four circuit of static beamsplitters, phase shifters, and short delay lines; and a 2D array of homodyne detectors. The symmetry of our proposed circuit allows us to combine the effects of finite squeezing and uniform photon loss within the noise model, resulting in more comprehensive threshold estimates. These jumps over both architectural and analytical hurdles considerably expedite the construction of a photonic quantum computer.

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“…In topological QC, the qubits are encoded in a two-dimensional plane while the actual computation takes place in a third dimension, thus rendering the need for the construction of 3D cluster states. Proposals do exist for the generation of 3D cluster states [51,52], and the next interesting step is thus to analyze the performance of these states using the techniques developed in this article. the output mode cannot be phase rotated, θ 7 = 0.…”

Section: Discussionmentioning

confidence: 99%

Architecture and noise analysis of continuous-variable quantum gates using two-dimensional cluster states

2020

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Temporal-mode continuous-variable three-dimensional cluster state for topologically protected measurement-based quantum computation

Cited by 29 publications

References 44 publications

Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer

Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer

Fault-tolerant quantum computation with static linear optics

Architecture and noise analysis of continuous-variable quantum gates using two-dimensional cluster states

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