304 citations · 2.2k across the 37 of their papers we have counts for
35 papers · 1 filter
Dissipatively Stabilized 0-n Fock Qubits for Noise-Biased Quantum Computing
Su Direkci, Simon Lieu, Kyungjoo Noh +1
Noise-biased qubits have bit-flip errors that are exponentially suppressed relative to phase-flip errors, and offer a promising route toward fault-tolerant quantum computing. Howev…
Bias-preserving cat-cat CNOT gate via vacuum-conditional beam-splitter
Yufeng Ye, Connor T. Hann, Kyungjoo Noh +4
Cat qubits can exhibit strong noise bias due to their exponentially enhanced bit-flip times and only polynomially reduced phase-flip times with increasing photon number, which make…
Classical simulation of noisy random circuits from exponential decay of correlation
Su-un Lee, Soumik Ghosh, Changhun Oh +3
We study the classical simulability of noisy random quantum circuits under general noise models. While various classical algorithms for simulating noisy random circuits have been p…
Frequency-noise-insensitive universal control of Kerr-cat qubits
Lennart Maximilian Seifert, Connor T. Hann, Kyungjoo Noh
We theoretically study the influence of frequency uncertainties on the operation of a Kerr-cat qubit. As the mean photon number increases, Kerr-cat qubits provide an increasing lev…
Viewing protected superconducting qubits through the lens of the cat qubit
Simon Lieu, Emma L. Rosenfeld, Kyungjoo Noh +1
We draw analogies between protected superconducting qubits and bosonic qubits by studying the fluxonium Hamiltonian in its Fock basis. The mean-field phase diagram of fluxonium (at…
Performance and achievable rates of the Gottesman-Kitaev-Preskill code for pure-loss and amplification channels
Guo Zheng, Wenhao He, Gideon Lee +2
Quantum error correction codes protect information from realistic noisy channels and lie at the heart of quantum computation and communication tasks. Understanding the optimal perf…
Exploring the quantum capacity of a Gaussian random displacement channel using Gottesman-Kitaev-Preskill codes and maximum likelihood decoding
Mao Lin, Kyungjoo Noh
Determining the quantum capacity of a noisy quantum channel is an important problem in the field of quantum communication theory. In this work, we consider the Gaussian random disp…
Hybrid cat-transmon architecture for scalable, hardware-efficient quantum error correction
Connor T. Hann, Kyungjoo Noh, Harald Putterman +6
Dissipative cat qubits are a promising physical platform for quantum computing, since their large noise bias can enable more hardware-efficient quantum error correction. In this wo…
Preserving phase coherence and linearity in cat qubits with exponential bit-flip suppression
Harald Putterman, Kyungjoo Noh, Rishi N. Patel +17
Cat qubits, a type of bosonic qubit encoded in a harmonic oscillator, can exhibit an exponential noise bias against bit-flip errors with increasing mean photon number. Here, we foc…
Hardware-efficient quantum error correction via concatenated bosonic qubits
Harald Putterman, Kyungjoo Noh, Connor T. Hann +118
In order to solve problems of practical importance, quantum computers will likely need to incorporate quantum error correction, where a logical qubit is redundantly encoded in many…
Cross-resonance control of an oscillator with an auxiliary fluxonium qubit
Guo Zheng, Simon Lieu, Emma L. Rosenfeld +2
The conditional displacement (CD) gate between an oscillator and a discrete-variable auxiliary qubit plays a key role in quantum information processing tasks, such as enabling univ…
Closest lattice point decoding for multimode Gottesman-Kitaev-Preskill codes
Mao Lin, Christopher Chamberland, Kyungjoo Noh
Quantum error correction (QEC) plays an essential role in fault-tolerantly realizing quantum algorithms of practical interest. Among different approaches to QEC, encoding logical q…
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…
Quantum Computation and Communication in Bosonic Systems
Kyungjoo Noh
Quantum computation and communication are important branches of quantum information science. However, noise in realistic quantum devices fundamentally limits the utility of these q…
Autonomous quantum error correction and quantum computation
José Lebreuilly, Kyungjoo Noh, Chiao-Hsuan Wang +2
In this work, we present a general theoretical framework for the study of autonomously corrected quantum devices. First, we identify a necessary and sufficient revised version of t…
Low overhead fault-tolerant quantum error correction with the surface-GKP code
Kyungjoo Noh, Christopher Chamberland, Fernando G. S. L. Brandão
Fault-tolerant quantum error correction is essential for implementing quantum algorithms of significant practical importance. In this work, we propose a highly effective use of the…
Classical simulation of lossy boson sampling using matrix product operators
Changhun Oh, Kyungjoo Noh, Bill Fefferman +1
Characterizing the computational advantage from noisy intermediate-scale quantum (NISQ) devices is an important task from theoretical and practical perspectives. Here, we numerical…
A fault-tolerant continuous-variable measurement-based quantum computation architecture
Mikkel V. Larsen, Christopher Chamberland, Kyungjoo Noh +2
Continuous variable measurement-based quantum computation on cluster states has in recent years shown great potential for scalable, universal, and fault-tolerant quantum computatio…
Building a fault-tolerant quantum computer using concatenated cat codes
Christopher Chamberland, Kyungjoo Noh, Patricio Arrangoiz-Arriola +13
We present a comprehensive architectural analysis for a proposed fault-tolerant quantum computer based on cat codes concatenated with outer quantum error-correcting codes. For the…
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,…
Photon-Number-Dependent Hamiltonian Engineering for Cavities
Chiao-Hsuan Wang, Kyungjoo Noh, José Lebreuilly +2
Cavity resonators are promising resources for quantum technology, while native nonlinear interactions for cavities are typically too weak to provide the level of quantum control re…
Quantum information processing with bosonic qubits in circuit QED
Atharv Joshi, Kyungjoo Noh, Yvonne Y. Gao
The unique features of quantum theory offer a powerful new paradigm for information processing. Translating these mathematical abstractions into useful algorithms and applications…
Very low overhead fault-tolerant magic state preparation using redundant ancilla encoding and flag qubits
Christopher Chamberland, Kyungjoo Noh
The overhead cost of performing universal fault-tolerant quantum computation for large scale quantum algorithms is very high. Despite several attempts at alternative schemes, magic…
Efficient classical simulation of noisy random quantum circuits in one dimension
Kyungjoo Noh, Liang Jiang, Bill Fefferman
Understanding the computational power of noisy intermediate-scale quantum (NISQ) devices is of both fundamental and practical importance to quantum information science. Here, we ad…