Qiyao (Catherine) Liang
Qiyao (Catherine) Liang
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How Diffusion Models Learn to Factorize and Compose
We explore how diffusion models factorize and compose concepts.
Qiyao (Catherine) Liang
,
Ziming Liu
,
Mitchell Ostrow
,
Ila R. Fiete
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Pulse optimization for high-precision motional-mode characterization in trapped-ion quantum computers
High-fidelity operation of quantum computers requires precise knowledge of the physical system through characterization. For motion-mediated entanglement generation in trapped ions, it is crucial to have precise knowledge of the motional-mode parameters such as the mode frequencies and the Lamb-Dicke parameters.
Qiyao (Catherine) Liang
,
Mingyu Kang
,
Ming Li
,
Yunseong Nam
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Do Diffusion Models Learn Semantically Meaningful and Efficient Representations?
Diffusion models are capable of impressive feats of image generation with uncommon juxtapositions such as astronauts riding horses on the moon with properly placed shadows. These outputs indicate the ability to perform compositional generalization, but how do the models do so?
Qiyao (Catherine) Liang
,
Ziming Liu
,
Ila R. Fiete
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Modeling the Performance of Early Fault-Tolerant Quantum Algorithms
Progress in fault-tolerant quantum computation (FTQC) has driven the pursuit of practical applications with early fault-tolerant quantum computers (EFTQC). These devices, limited in their qubit counts and fault-tolerance capabilities, require algorithms that can accommodate some degrees of error, which are known as EFTQC algorithms.
Qiyao (Catherine) Liang
,
Yiqing Zhou
,
Archismita Dalal
,
Peter D. Johnson
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Efficient motional-mode characterization for high-fidelity trapped-ion quantum computing
To achieve high-fidelity operations on a large-scale quantum computer, the parameters of the physical system must be efficiently characterized with high accuracy.
Mingyu Kang
,
Qiyao (Catherine) Liang
,
Ming Li
,
Yunseong Nam
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Batch Optimization of Frequency-Modulated Pulses for Robust Two-Qubit Gates in Ion Chains
Two-qubit gates in trapped-ion quantum computers are generated by applying spin-dependent forces that temporarily entangle the internal state of the ion with its motion.Laser pulses are carefully designed to generate a maximally entangling gate between the ions while minimizing any residual entanglement between the motion and the ion.
Mingyu Kang
,
Qiyao (Catherine) Liang
,
Bichen Zhang
,
Shilin Huang
,
Ye Wang
,
Chao Fang
,
Jungsang Kim
,
Kenneth R. Brown
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High-Fidelity Two-Qubit Gates Using a Microelectromechanical-System-Based Beam Steering System for Individual Qubit Addressing
In a large scale trapped atomic ion quantum computer, high-fidelity two-qubit gates need to be extended over all qubits with individual control. We realize and characterize high-fidelity two-qubit gates in a system with up to four ions using radial modes.
Ye Wang
,
Stephen Crain
,
Chao Fang
,
Bichen Zhang
,
Shilin Huang
,
Qiyao (Catherine) Liang
,
Pak Hong Leung
,
Kenneth R. Brown
,
Jungsang Kim
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