233 citations · 1.2k across the 31 of their papers we have counts for
31 papers
Trotter error compensation with polylogarithmic precision and nested-commutator scaling without ancillas
Xinzhao Wang, Shuo Zhou, Ziruo Wang +5
Product formulas are among the most practical approaches to Hamiltonian simulation, requiring no ancillary qubits and exhibiting error bounds governed by nested commutators rather…
Quantum-classical crossover in fault-tolerant quantum dynamics simulation
Jinzhao Sun, Bozhen Zhou, Jue Xu +28
While quantum computers promise to solve classically intractable problems, identifying the point at which fault-tolerant quantum computation outperforms the best classical algorith…
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…
Scaling Quantum Networks via Phase-Stable Vacuum Beam Guide: Architectural Blueprint and Benchmark
Yuexun Huang, Delaney Smith, Pei Zeng +4
Scaling quantum networks to continental distances requires physical infrastructure capable of overcoming both exponential attenuation and severe phase decoherence. While the concep…
Randomised composite linear-combination-of-unitaries: its role in quantum simulation and observable estimation
Jinzhao Sun, Pei Zeng
Randomisation is widely used in quantum algorithms to reduce the number of quantum gates and ancillary qubits required. A range of randomised algorithms, including eigenstate prope…
Practical hybrid PQC-QKD protocols with enhanced security and performance
Pei Zeng, Debayan Bandyopadhyay, José A. Méndez Méndez +10
Quantum resistance is vital for emerging cryptographic systems as quantum technologies continue to advance towards large-scale, fault-tolerant quantum computers. Resistance may be…
Towards efficient and secure quantum-classical communication networks
Pei Zeng, Debayan Bandyopadhyay, José A. Méndez Méndez +7
The rapid advancement of quantum technologies calls for the design and deployment of quantum-safe cryptographic protocols and communication networks. There are two primary approach…
Quantum subspace verification for error correction codes
Junjie Chen, Pei Zeng, Qi Zhao +2
Benchmarking the performance of quantum error correction codes in physical systems is crucial for achieving fault-tolerant quantum computing. Current methodologies, such as (shadow…
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…
High-precision and low-depth quantum algorithm design for eigenstate problems
Jinzhao Sun, Pei Zeng, Tom Gur +1
Estimating the eigenstate properties of quantum systems is a long-standing, challenging problem for both classical and quantum computing. Existing universal quantum algorithms typi…
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…
Pilot-reference-free continuous-variable quantum key distribution with efficient decoy-state analysis
Anran Jin, Xingjian Zhang, Liang Jiang +2
Continuous-variable quantum key distribution (CV QKD) using optical coherent detectors is practically favorable due to its low implementation cost, flexibility of wavelength divisi…
Simple and high-precision Hamiltonian simulation by compensating Trotter error with linear combination of unitary operations
Pei Zeng, Jinzhao Sun, Liang Jiang +1
Trotter and linear-combination-of-unitary (LCU) are two popular Hamiltonian simulation methods. We propose Hamiltonian simulation algorithms using LCU to compensate Trotter error,…
Experimental mode-pairing measurement-device-independent quantum key distribution without global phase-locking
Hao-Tao Zhu, Yizhi Huang, Hui Liu +11
In the past two decades, quantum key distribution networks based on telecom fibers have been implemented on metropolitan and intercity scales. One of the bottlenecks lies in the ex…
Scalable fast benchmarking for individual quantum gates with local twirling
Yihong Zhang, Wenjun Yu, Pei Zeng +2
With the development of controllable quantum systems, fast and practical characterization for multi-qubit gates is essential for building high-fidelity quantum computing devices. T…
Quantum key distribution surpassing the repeaterless rate-transmittance bound without global phase locking
Pei Zeng, Hongyi Zhou, Weijie Wu +1
Quantum key distribution -- the establishment of information-theoretically secure keys based on quantum physics -- is mainly limited by its practical performance, which is characte…
Quantum Complementarity Approach to Device-Independent Security
Xingjian Zhang, Pei Zeng, Tian Ye +2
Complementarity is an essential feature of quantum mechanics. The preparation of an eigenstate of one observable implies complete randomness in its complementary observable. In qua…
Reference-frame-independent design of phase-matching quantum key distribution
Anran Jin, Pei Zeng, Richard V. Penty +1
The recently proposed phase-matching quantum key distribution offers means to overcome the linear key rate-transmittance bound. Since the key information is encoded onto the phases…
Universal quantum algorithmic cooling on a quantum computer
Pei Zeng, Jinzhao Sun, Xiao Yuan
Quantum cooling, a deterministic process that drives any state to the lowest eigenstate, has been widely used from studying ground state properties of chemistry and condensed matte…
Characterizing correlation within multipartite quantum systems via local randomized measurements
Zhenhuan Liu, Pei Zeng, You Zhou +1
Given a quantum system on many qubits split into a few different parties, how many total correlations are there between these parties? Such a quantity, aimed to measure the deviati…
One-shot dynamical resource theory
Xiao Yuan, Pei Zeng, Minbo Gao +1
A fundamental problem in resource theory is to study the manipulation of the resource. Focusing on a general dynamical resource theory of quantum channels, here we consider tasks o…
Recent advances on quantum key distribution overcoming the linear secret key capacity bound
Yingqiu Mao, Pei Zeng, Teng-Yun Chen
A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances. Previous studies show that the key rate of point-to-point QKD is l…
Robust shadow estimation
Senrui Chen, Wenjun Yu, Pei Zeng +1
Efficiently estimating properties of large and strongly coupled quantum systems is a central focus in many-body physics and quantum information theory. While quantum computers prom…
Phase-Matching Quantum Cryptographic Conferencing
Shuai Zhao, Pei Zeng, Wen-Fei Cao +6
Quantum cryptographic conferencing (QCC) holds promise for distributing information-theoretic secure keys among multiple users over long distance. Limited by the fragility of Green…