8 papers
Degeneracy Cutting: A Local and Efficient Post-Processing for Belief Propagation Decoding of Quantum Low-Density Parity-Check Codes
Kento Tsubouchi, Hayata Yamasaki, Shiro Tamiya
Quantum low-density parity-check (qLDPC) codes are promising for realizing scalable fault-tolerant quantum computation due to their potential for low-overhead protocols. A common a…
Simple, Efficient, and Generic Post-Selection Decoding for qLDPC codes
Haipeng Xie, Nobuyuki Yoshioka, Kento Tsubouchi +1
Quantum error correction is indispensable for scalable quantum computation. Although encoding logical qubits substantially enhances noise resilience, achieving logical error rates…
Noise-Agnostic Unbiased Quantum Error Mitigation for Logical Qubits
Haipeng Xie, Nobuyuki Yoshioka, Kento Tsubouchi +1
Probabilistic error cancellation is a quantum error mitigation technique capable of producing unbiased computation results but requires an accurate error model. Constructing this m…
Symmetric channel verification for purifying noisy quantum channels
Kento Tsubouchi, Yosuke Mitsuhashi, Ryuji Takagi +1
Symmetry inherent in quantum states has been widely used to reduce the effect of noise in quantum error correction and a quantum error mitigation technique known as symmetry verifi…
Symmetric Clifford twirling for cost-optimal quantum error mitigation in early FTQC regime
Kento Tsubouchi, Yosuke Mitsuhashi, Kunal Sharma +1
Twirling noise affecting quantum gates is essential in understanding and controlling errors, but applicable operations to noise are usually restricted by symmetries inherent in qua…
Quantum error mitigation for rotation symmetric bosonic codes with symmetry expansion
Suguru Endo, Yasunari Suzuki, Kento Tsubouchi +4
The rotation symmetric bosonic code (RSBC) is a unified framework of practical bosonic codes that have rotation symmetries, such as cat codes and binomial codes. While cat codes ac…