Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Digital Quantum Simulation for Spectroscopy of Schwinger Model
Dongwook Ghim, Masazumi Honda·Apr 23, 2024
This note discusses a method for computing the energy spectra of quantum field theory utilizing digital quantum simulation. A quantum algorithm, called coherent imaging spectroscopy, quenches the vacuum with a time-oscillating perturbation and then r...
Lattice Surgery for Dummies
Avimita Chatterjee, Subrata Das, Swaroop Ghosh·Apr 19, 2024
Quantum error correction (QEC) plays a crucial role in correcting noise and paving the way for fault-tolerant quantum computing. This field has seen significant advancements, with new quantum error correction codes emerging regularly to address error...
Fermionic quantum simulation on Andreev bound state superlattices
Peter D. Johannsen, C. Schrade·Apr 18, 2024
Arrays of superconducting qubits and cavities offer a promising route for realizing artificial materials. However, many analog simulations on superconducting circuit hardware have focused on bosonic systems. Fermionic simulations, in contrast, have l...
Quantum computing topological invariants of two-dimensional quantum matter
Marcel Niedermeier, Mark Nairn, C. Flindt +1 more·Apr 9, 2024
Quantum algorithms provide a potential strategy for solving computational problems that are intractable by classical means. Computing the topological invariants of topological matter is one central problem in research on quantum materials, and a vari...
Broadband and fabrication-tolerant 3-dB couplers with topological valley edge modes
Guo-Jing Tang, Xiaodong Chen, Lu Sun +10 more·Mar 25, 2024
3-dB couplers, which are commonly used in photonic integrated circuits for on-chip information processing, precision measurement, and quantum computing, face challenges in achieving robust performance due to their limited 3-dB bandwidths and sensitiv...
Doped stabilizer states in many-body physics and where to find them
Andi Gu, Salvatore F. E. Oliviero, L. Leone·Mar 22, 2024
This work uncovers a fundamental connection between doped stabilizer states, a concept from quantum information theory, and the structure of eigenstates in perturbed many-body quantum systems. We prove that for Hamiltonians consisting of a sum of com...
Direct Probe of Topology and Geometry of Quantum States on IBM Q
Tianqi Chen, Hai-Tao Ding, Ruizhe Shen +2 more·Mar 21, 2024
The concepts of topology and geometry are of critical importance in exploring exotic phases of quantum matter. Though they have been investigated on various experimental platforms, to date a direct probe of topological and geometric properties on a u...
Effectiveness of the syndrome extraction circuit with flag qubits on IBM quantum hardware
Younghun Kim, Hansol Kim, Jeongsoo Kang +2 more·Mar 15, 2024
Large-scale quantum circuits are required to exploit the advantages of quantum computers. Despite significant advancements in quantum hardware, scalability remains a challenge, with errors accumulating as more qubits and gates are added. To overcome ...
Quantum memory at nonzero temperature in a thermodynamically trivial system
Yifan Hong, Jinkang Guo, Andrew Lucas·Mar 15, 2024
Passive error correction protects logical information forever (in the thermodynamic limit) by updating the system based only on local information and few-body interactions. A paradigmatic example is the classical two-dimensional Ising model: a Metrop...
Quantum double structure in cold atom superfluids
E. Johansen, C. Vale, T. Simula·Mar 11, 2024
The theory of topological quantum computation is underpinned by two important classes of models. One is based on non-abelian Chern-Simons theory, which yields the so-called $\rm{SU}(2)_k$ anyon models that often appear in the context of electrically ...
Alternative Method for Estimating Betti Numbers
Nhat A. Nghiem·Mar 7, 2024
Topological data analysis (TDA) is a fast-growing field that utilizes advanced tools from topology to analyze large-scale data. A central problem in topological data analysis is estimating the so-called Betti numbers of the underlying simplicial comp...
Characterizing Dynamic Hybridization of Majorana Zero Modes for Universal Quantum Computing.
Themba Hodge, Eric Mascot, Dan Crawford +1 more·Mar 4, 2024
Qubits built out of Majorana zero modes (MZMs) have long been theorized as a potential pathway toward fault-tolerant topological quantum computation. Almost unavoidable in these processes is Majorana wave function overlap, known as hybridization, whi...
Quantum distance approximation for persistence diagrams
Bernardo Ameneyro, R. Herrman, G. Siopsis +1 more·Feb 27, 2024
Topological data analysis (TDA) methods can be useful for classification and clustering tasks in many different fields as they can provide two dimensional persistence diagrams that summarize important information about the shape of potentially comple...
Exact Calculations of Coherent Information for Toric Codes under Decoherence: Identifying the Fundamental Error Threshold
Jong Yeon Lee·Feb 26, 2024
The toric code is a canonical example of a topological error-correcting code. Two logical qubits stored within the toric code are robust against local decoherence, ensuring that these qubits can be faithfully retrieved as long as the error rate remai...
Progressive-Proximity Bit-Flipping for Decoding Surface Codes
Michele Pacenti, Mark F. Flanagan, Dimitris Chytas +1 more·Feb 24, 2024
Topological quantum codes, such as toric and surface codes, are excellent candidates for hardware implementation due to their robustness against errors and their local interactions between qubits. However, decoding these codes efficiently remains a c...
Clifford circuits over non-cyclic abelian groups
M. Moses, Jacek Horecki, Konrad Deka +1 more·Feb 21, 2024
We present a discussion of the generalized Clifford group over non-cyclic finite abelian groups. These Clifford groups appear naturally in the theory of topological error correction and abelian anyon models. We demonstrate a generalized Gottesman-Kni...
An architecture for two-qubit encoding in neutral ytterbium-171 atoms
Zhubing Jia, W. Huie, Lintao Li +8 more·Feb 20, 2024
We present an architecture for encoding two qubits within the optical “clock” transition and nuclear spin-1/2 degree of freedom of neutral ytterbium-171 atoms. Inspired by recent high-fidelity control of all pairs of states within this four-dimension...
Dynamics of symmetry-protected topological matter on a quantum computer
Miguel Mercado, Kyle Y. Chen, P. Darekar +3 more·Feb 20, 2024
Control of topological edge modes is desirable for encoding quantum information resiliently against external noise. Their implementation on quantum hardware, however, remains a long-standing problem due to current limitations of circuit depth and noi...
Replica topological order in quantum mixed states and quantum error correction
Zhuan Li, Roger S. K. Mong·Feb 14, 2024
Topological phases of matter offer a promising platform for quantum computation and quantum error correction. Nevertheless, unlike its counterpart in pure states, descriptions of topological order in mixed states remain relatively under-explored. Our...
Computational complexity of isometric tensor network states
D. Malz, Rahul Trivedi·Feb 12, 2024
We determine the computational power of isometric tensor network states (isoTNS), a variational ansatz originally developed to numerically find and compute properties of gapped ground states and topological states in two dimensions. By mapping 2D iso...