Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
ZZ-Interaction-Free Single-Qubit-Gate Optimization in Superconducting Qubits
S. Watanabe, Y. Tabuchi, K. Heya +2 more·Sep 25, 2023
Overcoming the issue of qubit-frequency fluctuations is essential to realize stable and practical quantum computing with solid-state qubits. Static ZZ interaction, which causes a frequency shift of a qubit depending on the state of neighboring qubits...
Randomized term grouping over physical law on digital quantum simulation
Songqin Yang·Sep 24, 2023
We introduce a randomized algorithm based on qDrift to compute Hamiltonian dynamics on digital quantum computers. We frame it as physDrift because conservation laws in physics are obeyed during evolution of arbitrary quantum states. Empirically we ac...
An Architecture for Improved Surface Code Connectivity in Neutral Atoms
Joshua Viszlai, S. Lin, Siddharth Dangwal +2 more·Sep 24, 2023
In order to achieve error rates necessary for advantageous quantum algorithms, Quantum Error Correction (QEC) will need to be employed, improving logical qubit fidelity beyond what can be achieved physically. As today's devices begin to scale, co-des...
Light correcting light with nonlinear optics
Sachleen Singh, B. Sephton, Wagner Tavares Buono +3 more·Sep 23, 2023
Abstract. Structured light, where complex optical fields are tailored in all their degrees of freedom, has become highly topical of late, advanced by a sophisticated toolkit comprising both linear and nonlinear optics. Removing undesired structure fr...
Completeness of qufinite ZXW calculus, a graphical language for finite-dimensional quantum theory
Quanlong Wang, Boldizsár Poór, Razin A. Shaikh·Sep 22, 2023
Finite-dimensional quantum theory serves as the theoretical foundation for quantum information and computation. Mathematically, it is formalized in the category FHilb, comprising all finite-dimensional Hilbert spaces and linear maps between them. How...
Ultrathin Magnesium‐Based Coating as an Efficient Oxygen Barrier for Superconducting Circuit Materials
Chenyu Zhou, Junsik Mun, Juntao Yao +15 more·Sep 22, 2023
Scaling up superconducting quantum circuits based on transmon qubits necessitates substantial enhancements in qubit coherence time. Over recent years, tantalum (Ta) has emerged as a promising candidate for transmon qubits, surpassing conventional cou...
Dynamical subset sampling of quantum error-correcting protocols
Sascha Heußen, Don Winter, M. Rispler +1 more·Sep 22, 2023
Quantum error correcting (QEC) stabilizer codes enable protection of quantum information against errors during storage and processing. Simulation of noisy QEC codes is used to identify the noise parameters necessary for advantageous operation of logi...
ERASER: Towards Adaptive Leakage Suppression for Fault-Tolerant Quantum Computing
S. Vittal, Poulami Das, Moinuddin K. Qureshi·Sep 22, 2023
Quantum error correction (QEC) codes can tolerate hardware errors by encoding fault-tolerant logical qubits using redundant physical qubits and detecting errors using parity checks. Leakage errors occur in quantum systems when a qubit leaves its comp...
Encoding optimization for quantum machine learning demonstrated on a superconducting transmon qutrit
Shuxiang Cao, Weixi Zhang, Jules Tilly +9 more·Sep 22, 2023
A qutrit represents a three-level quantum system, so that one qutrit can encode more information than a qubit, which corresponds to a two-level quantum system. This work investigates the potential of qutrit circuits in machine learning classification...
Compatibility of Generalized Noisy Qubit Measurements
Martin J. Renner·Sep 21, 2023
It is a crucial feature of quantum mechanics that not all measurements are compatible with each other. However, if measurements suffer from noise they may lose their incompatibility. Here, we consider the effect of white noise and determine the criti...
Optimization of Quantum Circuits for Stabilizer Codes
Arijit Mondal, Keshab K. Parhi·Sep 21, 2023
Quantum computing is an emerging technology that has the potential to achieve exponential speedups over their classical counterparts. To achieve quantum advantage, quantum principles are being applied to fields such as communications, information pro...
Variational Quantum Harmonizer: Generating Chord Progressions and Other Sonification Methods with the VQE Algorithm
P. Itaboraí, Tim Schwägerl, María Aguado Yáñez +4 more·Sep 21, 2023
This work investigates a case study of using physical-based sonification of Quadratic Unconstrained Binary Optimization (QUBO) problems, optimized by the Variational Quantum Eigensolver (VQE) algorithm. The VQE approximates the solution of the proble...
Quantum computing perspective for electromagnetic wave propagation in cold magnetized plasmas
E. Koukoutsis, K. Hizanidis, G. Vahala +3 more·Sep 21, 2023
Electromagnetic waves are an inherent part of all plasmas—laboratory fusion plasmas or astrophysical plasmas. The conventional methods for studying properties of electromagnetic waves rely on discretization of Maxwell equations suitable for implement...
Quantum Circuits for Stabilizer Error Correcting Codes: A Tutorial
Arijit Mondal, Keshab K. Parhi·Sep 21, 2023
Quantum computers have the potential to provide exponential speedups over their classical counterparts. Quantum principles are being applied to fields such as communications, information processing, and artificial intelligence to achieve quantum adva...
Wavelet correlation noise analysis for qubit operation variable time series
A. Seedhouse, N. D. Stuyck, S. Serrano +10 more·Sep 21, 2023
In quantum computing, characterizing the full noise profile of qubits can aid in increasing coherence times and fidelities by developing error-mitigating techniques specific to the noise present. This characterization also supports efforts in advanci...
Silicon spin qubit noise characterization using real-time feedback protocols and wavelet analysis
N. Dumoulin Stuyck, A. Seedhouse, S. Serrano +10 more·Sep 21, 2023
Recently, several groups have demonstrated two-qubit gate fidelities in semiconductor spin qubit systems above 99%. Achieving this regime of fault-tolerant compatible high fidelities is nontrivial and requires exquisite stability and precise control ...
A Robust Large-Period Discrete Time Crystal and its Signature in a Digital Quantum Computer
Tianqi Chen, Ruizhe Shen, Ching Hua Lee +2 more·Sep 20, 2023
Discrete time crystals (DTCs) are novel out-of-equilibrium quantum states of matter which break time translational symmetry. DTCs have been extensively realized in experiments, particularly their subclass that is characterized by period-doubling dyna...
Classical combinations of quantum states for solving banded circulant linear systems
Po-Wei Huang, Xiufan Li, Kelvin Koor +1 more·Sep 20, 2023
Solving linear systems is of great importance in numerous fields. Proposed quantum algorithms for preparing solutions for linear systems include the HHL algorithm with subsequent refinements and variational methods. Circulant linear systems appear in...
Three-qubit parity gate via simultaneous cross-resonance drives
Toshinari Itoko, Moein Malekakhlagh, Naoki Kanazawa +1 more·Sep 20, 2023
Native multi-qubit parity gates have various potential quantum computing applications, such as entanglement creation, logical state encoding and parity measurement in quantum error correction. Here, using simultaneous cross-resonance drives on two co...
Reducing hardware requirements for entanglement distribution via joint hardware-protocol optimization
Adrià Labay Mora, Francisco Ferreira da Silva, Stephanie Wehner·Sep 20, 2023
We conduct a numerical investigation of fiber-based entanglement distribution over distances of up to 1600 km using a chain of processing-node quantum repeaters. We determine minimal hardware requirements while simultaneously optimizing over protocol...