arXiv subjects

Peilin Du

Publications and source records attributed to Peilin Du.

5 recordsLinked to original sources

arXiv2026

A Flexible GKP-State-Embedded Fault-Tolerant Quantum Computation Configuration Based on a Three-Dimensional Cluster State

The integration of diverse quantum resources and the exploitation of more degrees of freedom provide key operational flexibility for universal fault-tolerant quantum computation. In this work, we propose a flexible Gottesman-Kitaev-Preskill-state-embedded fault-tolerant quantum computation architecture based on a three-dimensional cluster state constructed in polarization, frequency, and orbital angular momentum domains. Specifically, we design optical entanglement generators to produce three diverse entangled pairs, and subsequently construct a three-dimensional cluster state via a beam-splitter network with several time delays. Furthermore, we present a partially squeezed surface-GKP code to achieve fault-tolerant quantum computation and ultimately find the optimal choice of implementing the squeezing gate to give the best fault-tolerant performance (the fault-tolerant squeezing threshold is 11.5 dB). Our scheme is flexible, scalable, and experimentally feasible, providing versatile options for future optical fault-tolerant quantum computation architecture.

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arXiv2025

Fault-Tolerant Optical Quantum Computation using 3D Hybrid Cluster States

Hybridizing different physical systems or degrees of freedom offers significant advantages for realizing practical, universal, scalable, and fault-tolerant quantum computation (FTQC). Here, we propose optical FTQC schemes with low squeezing thresholds by leveraging the strengths of both discrete-variable (DV) and continuous-variable (CV) systems while utilizing frequency, time, and orbital angular momentum degrees of freedom. First, we design an optical entanglement generator (OEG) capable of producing various types of entangled pairs, including cluster pairs, hybrid entangled pairs, and GKP Bell pairs, which can be flexibly chosen by adjusting the measurement basis. Additionally, the OEG features extra ports for directly inputting (outputting) data (result) states via quantum teleportation, eliminating the need for optical switches. Secondly, large-scale one-dimensional, two-dimensional, and three-dimensional (3D) hybrid cluster states, composed of DV Gottesman-Kitaev-Preskill (GKP) qubits and CV squeezed states, are deterministically generated using the entangled pairs passed through a time-delay system. Moreover, we optimize the surface-GKP code to further reduce logical errors during the stabilizer measurements in the surface code. By combining the 3D cubic hybrid cluster state with the modified surface-GKP code and accounting for full circuit-level noise, FTQC is achieved with a squeezing threshold of 10 dB. Moreover, our method can also generate a 3D macronode Raussendorf-Harrington-Goyal (RHG) cluster state, facilitating an alternative FTQC scheme via the RHG-GKP code. Our work provides a viable pathway toward future optical FTQC architectures.

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arXiv2025

A Compact One-Way Fault-Tolerant Optical Quantum Computation

One-way quantum computation is a promising approach to achieving universal, scalable, and fault-tolerant quantum computation. However, a main challenge lies in the creation of universal, scalable three-dimensional cluster states. Here, an experimental scheme is proposed for building large-scale canonical three-dimensional cubic cluster states, which are compatible with the majority of qubit error-correcting codes, using the spatiospectral modes of an optical parametric oscillator. Combining with Gottesman-Kitaev-Preskill states, one-way fault-tolerant optical quantum computation can be achieved with a lower fault-tolerant squeezing threshold. Our scheme drastically simplify experimental configurations, paving the way for compact realizations of one-way fault-tolerant optical quantum computation.

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arXiv2025

A complete continuous-variable quantum computation architecture based on the 2D spatiotemporal cluster state

Continuous-variable measurement-based quantum computation, which requires deterministically generated large-scale cluster state, is a promising candidate for practical, scalable, universal, and fault-tolerant quantum computation. In this work, based on our compact and scalable scheme of generating a two-dimensional spatiotemporal cluster state, a complete architecture including cluster state preparation, gate implementations, and error correction, is proposed. First, a scheme for generating two-dimensional large-scale continuous-variable cluster state by multiplexing both the temporal and spatial domains is proposed. Then, the corresponding gate implementations by gate teleportation are discussed and the actual gate noise from the generated cluster state is considered. After that, the quantum error correction can be further achieved by utilizing the square-lattice Gottesman-Kitaev-Preskill (GKP) code. Finally, a fault-tolerant quantum computation can be realized by introducing bias into the square-lattice GKP code (to protect against phase-flip errors) and concatenating a repetition code (to handle the residual bit-flip errors), with a squeezing threshold of 12.3 dB. Our work provides a possible option for a complete fault-tolerant quantum computation architecture in the future.

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arXiv2023

Generation of large-scale continuous-variable cluster states multiplexed both in time and frequency domains

Large-scale continuous variable (CV) cluster state is necessary in quantum information processing based on measurement-based quantum computing (MBQC). Specially, generating large-scale CV cluster state multiplexed in time domain is easier to implement and has strong scalability in experiment. Here one-dimensional (1D) large-scale dual-rail CV cluster states multiplexed both in time and frequency domains are parallelly generated, which can be further extended to three-dimensional (3D) CV cluster state by combining two time-delay NOPA systems with beamsplitters. It is shown that the number of parallel arrays depends on the corresponding frequency comb lines and the partite number of each array can be very large (million), and scale of the 3D cluster state can be ultra-large. This scheme provides some special-structured CV cluster states, which will be valuable for quantum computing of hybrid domains.

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