Yipu Song
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View article: Developing an Anti-Racism Tool Kit for Medical Education: A Pre-Clerkship Curriculum Audit
Developing an Anti-Racism Tool Kit for Medical Education: A Pre-Clerkship Curriculum Audit Open
Background Racialized health inequities are poorly addressed in medical education, often presenting race without social context and perpetuating racialized biases. Reframing the understanding of race as a social construct and incorporating…
View article: Transmon-assisted high-fidelity controlled-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math> gates for integer fluxonium qubits
Transmon-assisted high-fidelity controlled- gates for integer fluxonium qubits Open
Fluxoniums, as partially-protected superconducting qubits are promising to be employed to build high-performance large-scale quantum processor. The recently proposed ``integer fluxonium" operates at zero external flux bias, with a frequenc…
View article: Constant-depth fan-out with real-time feedforward on a superconducting quantum processor
Constant-depth fan-out with real-time feedforward on a superconducting quantum processor Open
When using unitary gate sequences, the growth in depth of many quantum circuits with output size poses significant obstacles to practical quantum computation. The quantum fan-out operation, which reduces the circuit depth of quantum algori…
View article: AgentNet: Decentralized Evolutionary Coordination for LLM-based Multi-Agent Systems
AgentNet: Decentralized Evolutionary Coordination for LLM-based Multi-Agent Systems Open
The rapid advancement of large language models (LLMs) has enabled the development of multi-agent systems where multiple LLM-based agents collaborate on complex tasks. However, existing systems often rely on centralized coordination, leadin…
View article: Scalable Low-overhead Superconducting Non-local Coupler with Exponentially Enhanced Connectivity
Scalable Low-overhead Superconducting Non-local Coupler with Exponentially Enhanced Connectivity Open
Quantum error correction codes with non-local connections such as quantum low-density parity-check (qLDPC) incur lower overhead and outperform surface codes on large-scale devices. These codes are not applicable on current superconducting …
View article: Unambiguous discrimination of general quantum operations
Unambiguous discrimination of general quantum operations Open
The discrimination of quantum operations has long been an intriguing challenge, with theoretical research notably advancing our understanding of the quantum features in discriminating quantum objects. This challenge is closely related to t…
View article: Quantum state transfer between superconducting cavities via exchange-free interactions
Quantum state transfer between superconducting cavities via exchange-free interactions Open
We propose and experimentally demonstrate a novel protocol for transferring quantum states between superconducting cavities using only continuous two-mode squeezing interactions, without exchange of photonic excitations between cavities. T…
View article: Frequency-tunable microwave quantum light source based on superconducting quantum circuits
Frequency-tunable microwave quantum light source based on superconducting quantum circuits Open
A non-classical light source is essential for implementing a wide range of quantum information processing protocols, including quantum computing, networking, communication and metrology. In the microwave regime, propagating photonic qubits…
View article: Frequency-tunable microwave quantum light source based on superconducting quantum circuits
Frequency-tunable microwave quantum light source based on superconducting quantum circuits Open
A nonclassical light source is essential for implementing a wide range of quantum information processing protocols, including quantum computing, networking, communication, and metrology. In the microwave regime, propagating photonic qubits…
View article: Experimental quantum end-to-end learning on a superconducting processor
Experimental quantum end-to-end learning on a superconducting processor Open
Machine learning can be enhanced by a quantum computer via its inherent quantum parallelism. In the pursuit of quantum advantages for machine learning with noisy intermediate-scale quantum devices, it was proposed that the learning model c…
View article: Protecting quantum entanglement between error-corrected logical qubits
Protecting quantum entanglement between error-corrected logical qubits Open
Entanglement represents one of the most important conceptual advances in physics during the last century and is also one of the most essential resources in quantum information science. However, entanglement is fragile and its potential adv…
View article: Deep quantum neural networks equipped with backpropagation on a superconducting processor
Deep quantum neural networks equipped with backpropagation on a superconducting processor Open
Deep learning and quantum computing have achieved dramatic progresses in recent years. The interplay between these two fast-growing fields gives rise to a new research frontier of quantum machine learning. In this work, we report the first…
View article: Information scrambling dynamics in a fully controllable quantum simulator
Information scrambling dynamics in a fully controllable quantum simulator Open
Quantum information scrambling has received tremendous attention owing to its key concept in the fields of quantum chaos and quantum gravity. Here, with exploiting a fully controllable superconducting quantum processor, we study the verifi…
View article: An ultra-high gain single-photon transistor in the microwave regime
An ultra-high gain single-photon transistor in the microwave regime Open
A photonic transistor that can switch or amplify an optical signal with a single gate photon requires strong non-linear interaction at the single-photon level. Circuit quantum electrodynamics provides great flexibility to generate such an …
View article: dataset for: An ultra-high gain single-photon transistor in the microwave regime
dataset for: An ultra-high gain single-photon transistor in the microwave regime Open
The dataset for: An ultra-high gain single-photon transistor in the microwave regime
View article: dataset for: An ultra-high gain single-photon transistor in the microwave regime
dataset for: An ultra-high gain single-photon transistor in the microwave regime Open
The dataset for: An ultra-high gain single-photon transistor in the microwave regime
View article: Experimental preparation of generalized cat states for itinerant microwave photons
Experimental preparation of generalized cat states for itinerant microwave photons Open
Generalized cat states represent arbitrary superpositions of coherent states, which are of great importance in various quantum information processing protocols. Here we demonstrate a versatile approach to creating generalized itinerant cat…
View article: Experimental Quantum End-to-End Learning on a Superconducting Processor
Experimental Quantum End-to-End Learning on a Superconducting Processor Open
Machine learning can be substantially powered by a quantum computer owing to its huge Hilbert space and inherent quantum parallelism. In the pursuit of quantum advantages for machine learning with noisy intermediate-scale quantum devices, …
View article: A flying Schrödinger’s cat in multipartite entangled states
A flying Schrödinger’s cat in multipartite entangled states Open
Schrödinger’s cat originates from the famous thought experiment querying the counterintuitive quantum superposition of macroscopic objects. As a natural extension, several “cats” (quasi-classical objects) can be prepared into coherent quan…
View article: Demonstration of multi-qubit entanglement and algorithms on a programmable neutral atom quantum computer
Demonstration of multi-qubit entanglement and algorithms on a programmable neutral atom quantum computer Open
Gate model quantum computers promise to solve currently intractable computational problems if they can be operated at scale with long coherence times and high fidelity logic. Neutral atom hyperfine qubits provide inherent scalability due t…
View article: A flying Schrödinger cat in multipartite entangled states
A flying Schrödinger cat in multipartite entangled states Open
Schrödinger's cat originates from the famous thought experiment querying the counterintuitive quantum superposition of macroscopic objects. As a natural extension, several "cats" (quasi-classical objects) can be prepared into coherent quan…
View article: All-microwave nonadiabatic multiqubit geometric phase gate for superconducting qubits
All-microwave nonadiabatic multiqubit geometric phase gate for superconducting qubits Open
Geometric phase gates are promising tools toward robust quantum computing owing to their robustness against certain control errors and decoherence. Here, we propose a multiqubit architecture with a nonadiabatic geometric phase gate scheme …
View article: High-Efficiency Arbitrary Quantum Operation on a High-Dimensional Quantum System
High-Efficiency Arbitrary Quantum Operation on a High-Dimensional Quantum System Open
The ability to manipulate quantum systems lies at the heart of the development of quantum technology. The ultimate goal of quantum control is to realize arbitrary quantum operations (AQuOs) for all possible open quantum system dynamics. Ho…
View article: Impact of Spectators on a Two-Qubit Gate in a Tunable Coupling Superconducting Circuit
Impact of Spectators on a Two-Qubit Gate in a Tunable Coupling Superconducting Circuit Open
Cross-resonance (CR) gates have emerged as a promising scheme for fault-tolerant quantum computation with fixed-frequency qubits. We experimentally implement an entangling CR gate by using a microwave-only control in a tunable coupling sup…
View article: Experimental Simulation of Open Quantum System Dynamics via Trotterization
Experimental Simulation of Open Quantum System Dynamics via Trotterization Open
Digital quantum simulators provide a diversified tool for solving the evolution of quantum systems with complicated Hamiltonians and hold great potential for a wide range of applications. Although much attention is paid to the unitary evol…
View article: On-Demand Storage and Retrieval of Microwave Photons Using a Superconducting Multiresonator Quantum Memory
On-Demand Storage and Retrieval of Microwave Photons Using a Superconducting Multiresonator Quantum Memory Open
We realize on-demand storage and retrieval of weak coherent microwave photon pulses at the single-photon level. A superconducting multiresonator system which is composed of a set of frequency-tunable coplanar waveguide resonators is implem…