62 citations · 259 across the 18 of their papers we have counts for
19 papers
High-rate qLDPC processors
Aditya Bhardwaj, Muzhou Ma, Nadine Meister +6
Despite significant progress on quantum low-density parity-check (qLDPC) codes, building qLDPC processors that are high-rate, high-throughput, hardware-friendly, and fast-to-decode…
Logical computation with canonical lifted product codes
Han Zheng, Guo Zheng, Liang Jiang +1
High-rate quantum low-density parity-check (qLDPC) codes encode many logical qubits with low physical-qubit overhead, but realizing efficient fault-tolerant computation on such den…
Shor's algorithm is possible with as few as 10,000 reconfigurable atomic qubits
Madelyn Cain, Qian Xu, Robbie King +6
Quantum computers have the potential to perform computational tasks beyond the reach of classical machines. A prominent example is Shor's algorithm for integer factorization and di…
Error-structure-tailored early fault-tolerant quantum computing
Pei Zeng, Guo Zheng, Qian Xu +1
Fault tolerance is widely regarded as indispensable for achieving scalable and reliable quantum computing. However, the spacetime overhead required for fault-tolerant quantum compu…
High-Rate Surgery: towards constant-overhead logical operations
Guo Zheng, Liang Jiang, Qian Xu
Scalable quantum computation requires not only quantum codes with low memory overhead but also encoded operations with low space-time overhead. High rate quantum low-density parity…
Constant-Overhead Fault-Tolerant Bell-Pair Distillation using High-Rate Codes
J. Pablo Bonilla Ataides, Hengyun Zhou, Qian Xu +4
We present a fault-tolerant Bell-pair distillation scheme achieving constant overhead through high-rate quantum low-density parity-check (qLDPC) codes. Our approach maintains a con…
Optimized four-qubit quantum error correcting code for amplitude damping channel
Xuanhui Mao, Qian Xu, Liang Jiang
Quantum error correction (QEC) is essential for reliable quantum information processing. Targeting a particular error channel, both the encoding and the recovery channel can be opt…
Dark spin-cats as biased qubits
Andreas Kruckenhauser, Ming Yuan, Han Zheng +8
We present a biased atomic qubit, universally implementable across all atomic platforms, encoded as a `spin-cat' within ground state Zeeman levels. The key characteristic of our co…
Fast and Parallelizable Logical Computation with Homological Product Codes
Qian Xu, Hengyun Zhou, Guo Zheng +4
Quantum error correction is necessary to perform large-scale quantum computation, but requires extremely large overheads in both space and time. High-rate quantum low-density-parit…
Fault-Tolerant Operation of Bosonic Qubits with Discrete-Variable Ancillae
Qian Xu, Pei Zeng, Daohong Xu +1
Fault-tolerant quantum computation with bosonic qubits often necessitates the use of noisy discrete-variable ancillae. In this work, we establish a comprehensive and practical faul…
Constant-Overhead Fault-Tolerant Quantum Computation with Reconfigurable Atom Arrays
Qian Xu, J. Pablo Bonilla Ataides, Christopher A. Pattison +7
Quantum low-density parity-check (qLDPC) codes can achieve high encoding rates and good code distance scaling, providing a promising route to low-overhead fault-tolerant quantum co…
Autonomous quantum error correction and fault-tolerant quantum computation with squeezed cat qubits
Qian Xu, Guo Zheng, Yu-Xin Wang +3
We propose an autonomous quantum error correction scheme using squeezed cat (SC) code against the dominant error source, excitation loss, in continuous-variable systems. Through re…
Construction of Bias-preserving Operations for Pair-cat Code
Ming Yuan, Qian Xu, Liang Jiang
Fault-tolerant quantum computation with depolarization error often requires demanding error threshold and resource overhead. If the operations can maintain high noise bias -- domin…
Quantum capacity and codes for the bosonic loss-dephasing channel
Peter Leviant, Qian Xu, Liang Jiang +1
Bosonic qubits encoded in continuous-variable systems provide a promising alternative to two-level qubits for quantum computation and communication. So far, photon loss has been th…
Distributed quantum error correction for chip-level catastrophic errors
Qian Xu, Alireza Seif, Haoxiong Yan +5
Quantum error correction holds the key to scaling up quantum computers. Cosmic ray events severely impact the operation of a quantum computer by causing chip-level catastrophic err…
Tailored XZZX codes for biased noise
Qian Xu, Nam Mannucci, Alireza Seif +3
Quantum error correction (QEC) for generic errors is challenging due to the demanding threshold and resource requirements. Interestingly, when physical noise is biased, we can tail…
Stabilizing a Bosonic Qubit using Colored Dissipation
Harald Putterman, Joseph Iverson, Qian Xu +4
Protected qubits such as the 0- qubit, and bosonic qubits including cat qubits and GKP qubits offer advantages for fault-tolerance. Some of these protected qubits (e.g., 0- q…
Engineering fast bias-preserving gates on stabilized cat qubits
Qian Xu, Joseph K Iverson, Fernando G. S. L. Brandao +1
Stabilized cat codes can provide a biased noise channel with a set of bias-preserving (BP) gates, which can significantly reduce the resource overhead for fault-tolerant quantum co…
Quantum repeaters based on concatenated bosonic and discrete-variable quantum codes
Filip Rozpędek, Kyungjoo Noh, Qian Xu +2
We propose an architecture of quantum-error-correction-based quantum repeaters that combines techniques used in discrete- and continuous-variable quantum information. Specifically,…