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

  • Du P
  • Wang Y
  • Liu K
  • et al.
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Abstract

A large-scale continuous variable (CV) cluster state is necessary in quantum information processing based on measurement-based quantum computing (MBQC). Specially, generating a large-scale CV cluster state multiplexed in a 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 a three-dimensional (3D) CV cluster state by combining two time-delay nondegenerate optical parametric amplification systems with beam-splitters. It is shown that the number of parallel arrays depends on the corresponding frequency comb lines, the partite number of each array can be very large (million), and the scale of the 3D cluster state can be ultra-large. In addition, the concrete quantum computing schemes of applying the generated 1D and 3D cluster states are also demonstrated. Our schemes may pave the way for fault-tolerant and topologically protected MBQC in hybrid domains, by further combining with efficient coding and quantum error correction.

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Du, P., Wang, Y., Liu, K., Yang, R., & Zhang, J. (2023). Generation of large-scale continuous-variable cluster states multiplexed both in time and frequency domains. Optics Express, 31(5), 7535. https://doi.org/10.1364/oe.479420

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