Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Variational quantum eigensolver for dynamic correlation functions
Hongxiang Chen, Max Nusspickel, J. Tilly +1 more·May 4, 2021
Recent practical approaches for the use of current generation noisy quantum devices in the simulation of quantum many-body problems have been dominated by the use of a variational quantum eigensolver (VQE). These coupled quantum-classical algorithms ...
Entangling Quantum Generative Adversarial Networks.
M. Niu, Alexander Zlokapa, M. Broughton +4 more·Apr 30, 2021
Generative adversarial networks (GANs) are one of the most widely adopted machine learning methods for data generation. In this work, we propose a new type of architecture for quantum generative adversarial networks (an entangling quantum GAN, EQ-GAN...
Quantum Architecture Search via Deep Reinforcement Learning
En-Jui Kuo, Yao-Lung L. Fang, Samuel Yen-Chi Chen·Apr 15, 2021
Recent advances in quantum computing have drawn considerable attention to building realistic application for and using quantum computers. However, designing a suitable quantum circuit architecture requires expert knowledge. For example, it is non-tri...
Reduced density matrix sampling: Self-consistent embedding and multiscale electronic structure on current generation quantum computers
J. Tilly, P. V. Sriluckshmy, Akashkumar Patel +6 more·Apr 12, 2021
We investigate fully self-consistent multiscale quantum-classical algorithms on current generation superconducting quantum computers, in a unified approach to tackle the correlated electronic structure of large systems in both quantum chemistry and co...
Logical abstractions for noisy variational Quantum algorithm simulation
Yipeng Huang, Steven Holtzen, T. Millstein +2 more·Mar 31, 2021
Due to the unreliability and limited capacity of existing quantum computer prototypes, quantum circuit simulation continues to be a vital tool for validating next generation quantum computers and for studying variational quantum algorithms, which are...
Variational quantum algorithm with information sharing
C. Self, K. Khosla, Alistair W. R. Smith +5 more·Mar 30, 2021
We introduce an optimisation method for variational quantum algorithms and experimentally demonstrate a 100-fold improvement in efficiency compared to naive implementations. The effectiveness of our approach is shown by obtaining multi-dimensional en...
Quantum machine learning of graph-structured data
Kerstin Beer, Megha Khosla, Julius Kohler +1 more·Mar 19, 2021
Graph structures are ubiquitous throughout the natural sciences. Here we consider graph-structured quantum data and describe how to carry out its quantum machine learning via quantum neural networks. In particular, we consider training data in the fo...
Millisecond Coherence in a Superconducting Qubit.
A. Somoroff, Q. Ficheux, R. Mencia +3 more·Mar 15, 2021
Improving control over physical qubits is a crucial component of quantum computing research. Here we report a superconducting fluxonium qubit with uncorrected coherence time T_{2}^{*}=1.48±0.13 ms, exceeding the state of the art for transmons by an ...
Leveraging Randomized Compiling for the QITE Algorithm
J. Ville, A. Morvan, A. Hashim +13 more·Mar 15, 2021
The success of the current generation of Noisy Intermediate-Scale Quantum (NISQ) hardware shows that quantum hardware may be able to tackle complex problems even without error correction. One outstanding issue is that of coherent errors arising from ...
Generation and dynamical manipulation of polarization entangled Bell states by a silicon quantum photonic circuit
Dongning Liu, Jingyuan Zheng, Lingjie Yu +5 more·Mar 13, 2021
A silicon quantum photonic circuit was proposed and demonstrated as an integrated quantum light source for telecom band polarization entangled Bell state generation and dynamical manipulation. Biphoton states were firstly generated in four silicon wa...
Topologically Protected Valley-Dependent Quantum Photonic Circuits.
Yang Chen, Xin-Tao He, Yujie Cheng +7 more·Mar 11, 2021
Topological photonics has been introduced as a powerful platform for integrated optics, since it can deal with robust light transport, and be further extended to the quantum world. Strikingly, valley-contrasting physics in topological photonic struct...
Dependence of integrated, instantaneous, and fluctuating entropy production on the initial state in quantum and classical processes.
Artemy Kolchinsky, D. Wolpert·Mar 9, 2021
We consider the additional entropy production (EP) incurred by a fixed quantum or classical process on some initial state ρ, above the minimum EP incurred by the same process on any initial state. We show that this additional EP, which we term the "m...
Massively-multiplexed generation of Bell-type entanglement using a quantum memory
M. Lipka, Mateusz Mazelanik, Adam Leszczyński +2 more·Mar 8, 2021
High-rate generation of hybrid photon-matter entanglement remains a fundamental building block of quantum network architectures enabling protocols such as quantum secure communication or quantum distributed computing. While a tremendous effort has be...
Generating cryptographically-strong random lattice bases and recognizing rotations of Zn
Tamar Lichter Blanks, Stephen D. Miller·Feb 12, 2021
Lattice-based cryptography relies on generating random bases which are difficult to fully reduce. Given a lattice basis (such as the private basis for a cryptosystem), all other bases are related by multiplication by matrices in $GL(n,\mathbb{Z})$. W...
Loss-tolerant concatenated Bell-state measurement with encoded coherent-state qubits for long-range quantum communication
Seok-Hyung Lee, Seung-Woo Lee, Hyunseok Jeong·Feb 8, 2021
The coherent-state qubit is a promising candidate for optical quantum information processing due to its nearly-deterministic nature of the Bell-state measurement (BSM). However, its nonorthogonality incurs difficulties such as failure of the BSM. One...
An Open-source Library of Large Integer Polynomial Multipliers
Malik Imran, Zain Ul Abideen, S. Pagliarini·Jan 27, 2021
Polynomial multiplication is a bottleneck in most of the public-key cryptography protocols, including Elliptic-curve cryptography and several of the post-quantum cryptography algorithms presently being studied. In this paper, we present a library of ...
SpinQ Gemini: a desktop quantum computer for education and research
Shi-Yao Hou, Guanru Feng, Zipeng Wu +13 more·Jan 25, 2021
SpinQ Gemini is a commercial desktop quantum computer designed and manufactured by SpinQ Technology. It is an integrated hardware-software system. The first generation product with two qubits was launched in January 2020. The hardware is based on NMR...
Quantum Learning Based Nonrandom Superimposed Coding for Secure Wireless Access in 5G URLLC
Dongyang Xu, Pinyi Ren·Jan 24, 2021
Secure wireless access in ultra-reliable low-latency communications (URLLC), which is a critical aspect of 5G security, has become increasingly important due to its potential support of grant-free configuration. In grant-free URLLC, precise allocatio...
Quantum Permutation Synchronization
Tolga Birdal, Vladislav Golyanik, C. Theobalt +1 more·Jan 19, 2021
We present QuantumSync, the first quantum algorithm for solving a synchronization problem in the context of computer vision. In particular, we focus on permutation synchronization which involves solving a non-convex optimization problem in discrete v...
Bright Electrically Controllable Quantum‐Dot‐Molecule Devices Fabricated by In Situ Electron‐Beam Lithography
Johannes Schall, M. Deconinck, N. Bart +15 more·Jan 10, 2021
Self‐organized semiconductor quantum dots represent almost ideal two‐level systems, which have strong potential to applications in photonic quantum technologies. For instance, they can act as emitters in close‐to‐ideal quantum light sources. Coupled ...