Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
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...
Synthesis of energy-conserving quantum circuits with XY interaction
Ge Bai, Iman Marvian·Sep 20, 2023
We study quantum circuits constructed from iSWAP gates and, more generally, from the entangling gates that can be realized with the XX + YY interaction alone. Such gates preserve the Hamming weight of states in the computational basis, which means th...
Qutrit state discrimination with mid-circuit measurements
Naoki Kanazawa, Haruki Emori, D. McKay·Sep 20, 2023
Qutrit state readout is an important technology not only for execution of qutrit algorithms but also for erasure detection in error correction circuits and leakage error characterization of the gate set. Conventional technique using a specialized IQ ...
Quantum Algorithm for Estimating Betti Numbers Using Cohomology Approach
Nhat A. Nghiem, Xianfeng David Gu, Tzu-Chieh Wei·Sep 19, 2023
Topological data analysis has emerged as a powerful tool for analyzing large-scale data. An abstract simplicial complex, in principle, can be built from data points, and by using tools from homology, topological features could be identified. Given a ...
Hardness results for decoding the surface code with Pauli noise
Alex Fischer, Akimasa Miyake·Sep 19, 2023
Real quantum computers will be subject to complicated, qubit-dependent noise, instead of simple noise such as depolarizing noise with the same strength for all qubits. We can do quantum error correction more effectively if our decoding algorithms tak...
QuBEC: Boosting Equivalence Checking for Quantum Circuits With QEC Embedding
Chao Lu, Navnil Choudhury, Utsav Banerjee +2 more·Sep 19, 2023
Quantum computing has proven to be capable of accelerating many algorithms by performing tasks that classical computers cannot. As quantum algorithms and implementations grow more complex, the need for rigorous circuit verification becomes critical, ...
Ultrafast Cascade Charge Transfer in Multibandgap Colloidal Quantum Dot Solids Enables Threshold Reduction for Optical Gain and Stimulated Emission.
N. Taghipour, M. Dalmases, G. Whitworth +2 more·Sep 19, 2023
Achieving low-threshold infrared stimulated emission in solution-processed quantum dots is critical to enable real-life applications including photonic integrated circuits (PICs), LIDAR application, and optical telecommunication. However, realization...
QubiC 2.0: An Extensible Open-Source Qubit Control System Capable of Mid-Circuit Measurement and Feed-Forward
Yilun Xu, Gang-Ming Huang, Neelay Fruitwala +5 more·Sep 19, 2023
Researchers manipulate and measure quantum processing units via the classical electronics control system. We developed an open-source FPGA-based quantum bit control system called QubiC for superconducting qubits. After a few years of qubit calibratio...
A hybrid algorithm for quadratically constrained quadratic optimization problems
Hongyi Zhou, Sirui Peng, Q. Li +1 more·Sep 19, 2023
Quadratically Constrained Quadratic Programs (QCQPs) are an important class of optimization problems with diverse real-world applications. In this work, we propose a variational quantum algorithm for general QCQPs. By encoding the variables in the am...
Quantum Multiplier Based on Exponent Adder
Junpeng Zhan·Sep 18, 2023
Quantum multiplication is a fundamental operation in quantum computing. It is important to have a quantum multiplier with low complexity. In this paper, we propose the Quantum Multiplier Based on Exponent Adder (QMbead), a new approach that requires ...
Fault-tolerant hyperbolic Floquet quantum error correcting codes
Ali Fahimniya, Hossein Dehghani, Kishor Bharti +4 more·Sep 18, 2023
A central goal in quantum error correction is to reduce the overhead of fault-tolerant quantum computing by increasing noise thresholds and reducing the number of physical qubits required to sustain a logical qubit. We introduce a potential path towa...