QECOOL: On-Line Quantum Error Correction with a Superconducting Decoder for Surface Code

Due to the low error tolerance of a qubit, detecting and correcting errors on it is essential for fault-tolerant quantum computing. Surface code (SC) associated with its decoding algorithm is one of the most promising quantum error correction (QEC) methods. QEC needs to be very power-efficient since...

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Veröffentlicht in:2021 58th ACM/IEEE Design Automation Conference (DAC) S. 451 - 456
Hauptverfasser: Ueno, Yosuke, Kondo, Masaaki, Tanaka, Masamitsu, Suzuki, Yasunari, Tabuchi, Yutaka
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 05.12.2021
Schlagworte:
Hardware
Josephson junctions
Measurement errors
Power demand
Quantum Error Correction
Qubit
Refrigerators
SFQ logic
Superconducting logic circuits
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Abstract Due to the low error tolerance of a qubit, detecting and correcting errors on it is essential for fault-tolerant quantum computing. Surface code (SC) associated with its decoding algorithm is one of the most promising quantum error correction (QEC) methods. QEC needs to be very power-efficient since the power budget is limited inside of a dilution refrigerator for superconducting qubits by which one of the most successful quantum computers (QCs) is built. In this paper, we propose an online-QEC algorithm and its hardware implementation with SFQ based superconducting digital circuits. We design a key building block of the proposed hardware with an SFQ cell library and evaluate it by the SPICE-level simulation. Each logic element is composed of about 3000 Josephson junctions and power consumption is about 2.78 \mu \mathrm{W} when operating with 2 GHz clock frequency which meets the required decoding speed. Our decoder is simulated on a quantum error simulator for code distances 5 to 13 and achieves a 1.0% accuracy threshold.
AbstractList Due to the low error tolerance of a qubit, detecting and correcting errors on it is essential for fault-tolerant quantum computing. Surface code (SC) associated with its decoding algorithm is one of the most promising quantum error correction (QEC) methods. QEC needs to be very power-efficient since the power budget is limited inside of a dilution refrigerator for superconducting qubits by which one of the most successful quantum computers (QCs) is built. In this paper, we propose an online-QEC algorithm and its hardware implementation with SFQ based superconducting digital circuits. We design a key building block of the proposed hardware with an SFQ cell library and evaluate it by the SPICE-level simulation. Each logic element is composed of about 3000 Josephson junctions and power consumption is about 2.78 \mu \mathrm{W} when operating with 2 GHz clock frequency which meets the required decoding speed. Our decoder is simulated on a quantum error simulator for code distances 5 to 13 and achieves a 1.0% accuracy threshold.
Author Tanaka, Masamitsu
Kondo, Masaaki
Ueno, Yosuke
Suzuki, Yasunari
Tabuchi, Yutaka
Author_xml – sequence: 1
  givenname: Yosuke
  surname: Ueno
  fullname: Ueno, Yosuke
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  organization: The University of Tokyo,Graduate School of Information Science and Technology,Tokyo,Japan
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  givenname: Masaaki
  surname: Kondo
  fullname: Kondo, Masaaki
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  organization: The University of Tokyo,Graduate School of Information Science and Technology,Tokyo,Japan
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  givenname: Masamitsu
  surname: Tanaka
  fullname: Tanaka, Masamitsu
  email: masami_t@nagoya-u.jp
  organization: Nagoya University,Graduate School of Engineering,Aichi,Japan
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  givenname: Yasunari
  surname: Suzuki
  fullname: Suzuki, Yasunari
  email: yasunari.suzuki.gz@hco.ntt.co.jp
  organization: NTT Secure Platform Laboratories,Tokyo,Japan
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  givenname: Yutaka
  surname: Tabuchi
  fullname: Tabuchi, Yutaka
  email: yutaka.tabuchi@riken.jp
  organization: The University of Tokyo,Research Center for Advanced Science and Technology,Tokyo,Japan
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Snippet Due to the low error tolerance of a qubit, detecting and correcting errors on it is essential for fault-tolerant quantum computing. Surface code (SC)...
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SubjectTerms Hardware
Josephson junctions
Measurement errors
Power demand
Quantum Error Correction
Qubit
Refrigerators
SFQ logic
Superconducting logic circuits
Title QECOOL: On-Line Quantum Error Correction with a Superconducting Decoder for Surface Code
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