Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Overcoming the Coherence Time Barrier in Quantum Machine Learning on Temporal Data
Fangjun Hu, Saeed A. Khan, Nicholas T. Bronn +4 more·Dec 26, 2023
Practical implementation of many quantum algorithms known today is limited by the coherence time of the executing quantum hardware and quantum sampling noise. Here we present a machine learning algorithm, NISQRC, for qubit-based quantum systems that ...
Microwave signal processing using an analog quantum reservoir computer
Alen Senanian, Sridhar Prabhu, Vladimir Kremenetski +8 more·Dec 26, 2023
Quantum reservoir computing (QRC) has been proposed as a paradigm for performing machine learning with quantum processors where the training takes place in the classical domain, avoiding the issue of barren plateaus in parameterized-circuit quantum n...
Universal control of four singlet–triplet qubits
Xin Zhang, E. Morozova, M. Rimbach-Russ +9 more·Dec 26, 2023
The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and ...
Designing fast quantum gates using optimal control with a reinforcement-learning ansatz
B. Sarma, Michael J. Hartmann·Dec 26, 2023
Fast quantum gates are crucial not only for the contemporary era of noisy intermediate-scale quantum devices but also for the prospective development of practical fault-tolerant quantum computing. Leakage errors, which arise from data qubits jumping ...
Celestial quantum error correction: I. Qubits from noncommutative Klein space
Alfredo Guevara, Yangrui Hu·Dec 26, 2023
Quantum gravity in 4D asymptotically flat spacetimes features spontaneous symmetry breaking due to soft radiation hair, intimately tied to the proliferation of IR divergences. A holographic description via a putative 2D CFT is expected free of such r...
The quantum house of cards
Xavier Waintal·Dec 26, 2023
Quantum computers have been proposed to solve a number of important problems such as discovering new drugs, new catalysts for fertilizer production, breaking encryption protocols, optimizing financial portfolios, or implementing new artificial intell...
Option pricing under stochastic volatility on a quantum computer
Guoming Wang, A. Kan·Dec 26, 2023
We develop quantum algorithms for pricing Asian and barrier options under the Heston model, a popular stochastic volatility model, and estimate their costs, in terms of T-count, T-depth and number of logical qubits, on instances under typical market ...
Quantum Secure Protocols for Multiparty Computations
Tapaswini Mohanty, Vikas Srivastava, S. Debnath +1 more·Dec 26, 2023
Secure multiparty computation (MPC) schemes allow two or more parties to conjointly compute a function on their private input sets while revealing nothing but the output. Existing state-of-the-art number-theoretic-based designs face the threat of att...
Accelerated quantum circuit Monte Carlo simulation for heavy quark thermalization
Xiaojian Du, Wenyang Qian·Dec 26, 2023
Thermalization of heavy quarks in the quark-gluon plasma (QGP) is one of the most promising phenomena for understanding the strong interaction. The energy loss and momentum broadening at low momentum can be well described by a stochastic process with...
A Quantum Approach to Solve N-Queens Problem
S. SanthoshG, P. Joshi, A. Barui +1 more·Dec 26, 2023
In this work, we have introduced two innovative quantum algorithms: the Direct Column Algorithm and the Quantum Backtracking Algorithm to solve N-Queens problem, which involves the arrangement of $N$ queens on an $N \times N$ chessboard such that the...
Improved Qubit Routing for QAOA Circuits
Ayse Kotil, F. Šimkovic, Martin Leib·Dec 26, 2023
We develop a qubit routing algorithm with polynomial classical run time for the Quantum Approximate Optimization Algorithm (QAOA). The algorithm follows a two step process. First, it obtains a near-optimal solution, based on Vizing's theorem for the ...
Error correction using squeezed Fock states
S. Korolev, E. N. Bashmakova, T. Golubeva·Dec 26, 2023
The paper addresses the construction of an error correction code for quantum computations based on squeezed Fock states. It is shown that the use of squeezed Fock states makes it possible to satisfy the Knill-Laflamme (KL) criteria for bosonic error ...
Classical capacity of quantum non-Gaussian attenuator and amplifier channels
Zacharie Van Herstraeten, Saikat Guha, Nicolas J. Cerf·Dec 25, 2023
We consider a quantum bosonic channel that couples the input mode via a beam splitter or two-mode squeezer to an environmental mode that is prepared in an arbitrary state. We investigate the classical capacity of this channel, which we call a non-Gau...
Skyrmion qubits: Challenges for future quantum computing applications
C. Psaroudaki, Elias Peraticos, C. Panagopoulos·Dec 25, 2023
Magnetic nano-skyrmions develop quantized helicity excitations, and the quantum tunneling between nano-skyrmions possessing distinct helicities is indicative of the quantum nature of these particles. Experimental methods capable of nondestructively r...
Quantum Algorithm for Signal Denoising
Sayantan Dutta, Adrian Basarab, Denis Kouamé +1 more·Dec 24, 2023
This letter presents a novel quantum algorithm for signal denoising, which performs a thresholding in the frequency domain through amplitude amplification and using an adaptive threshold determined by local mean values. The proposed algorithm is able...
Epitaxial growth of high-quality GaAs on Si(001) using ultrathin buffer layers
Kun Cheng, Tianyi Tang, Wenkang Zhan +4 more·Dec 24, 2023
The direct growth of III–V semiconductors on silicon holds tremendous potential for photonics applications. However, the inherent differences in their properties lead to defects in the epitaxial layer, including threading dislocations (TDs), antiphas...
Ecmas: Efficient Circuit Mapping and Scheduling for Surface Code
Mingzheng Zhu, Hao Fu, Jun Wu +3 more·Dec 23, 2023
As the leading candidate of quantum error correction codes, surface code suffers from significant overhead, such as execution time. Reducing the circuit's execution time not only enhances its execution efficiency but also improves fidelity. However, ...
Large-Area Spatially Ordered Mesa Top Single Quantum Dots: Suitable Single Photon Emitters for On-Chip Integrated Quantum Information Processing Platforms
Qi Huang, Lucas Jordao, Siyuan Lu +3 more·Dec 23, 2023
Realization of the long sought on-chip scalable photonic quantum information processing networks has been thwarted by the absence of spatially-ordered and scalable on-demand single photon emitters with emission figures-of-merit exceeding the required...
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Shaolun Ruan, Zhiding Liang, Qian-Guo Guan +4 more·Dec 23, 2023
With the rapid development of Quantum Machine Learning, quantum neural networks (QNN) have experienced great advancement in the past few years, harnessing the advantages of quantum computing to significantly speed up classical machine learning tasks....
Permutation-invariant quantum circuits
M. Mansky, Santiago Londoño Castillo, Victor Ramos Puigvert +1 more·Dec 22, 2023
The implementation of physical symmetries into problem descriptions allows for the reduction of parameters and computational complexity. We show the integration of the permutation symmetry as the most restrictive discrete symmetry into quantum circui...