Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Analytic Filter-Function Derivatives for Quantum Optimal Control
Isabel Nha Minh Le, J. Teske, Tobias Hangleiter +2 more·Mar 16, 2021
Auto-correlated noise appears in many solid state qubit systems and hence needs to be taken into account when developing gate operations for quantum information processing. However, explicitly simulating this kind of noise is often less efficient than ...
Simultaneous Perturbation Stochastic Approximation of the Quantum Fisher Information
Julien Gacon, Christa Zoufal, Giuseppe Carleo +1 more·Mar 15, 2021
The Quantum Fisher Information matrix (QFIM) is a central metric in promising algorithms, such as Quantum Natural Gradient Descent and Variational Quantum Imaginary Time Evolution. Computing the full QFIM for a model with d parameters, however, is co...
Hardware-efficient error-correcting codes for large nuclear spins
J. Gross, Clément Godfrin, A. Blais +1 more·Mar 15, 2021
Universal quantum computers require a large network of qubits robust against errors. Recent theoretical and experimental studies on donor nuclear spins in silicon, engineered on semiconductor platforms compatible with industrial fabrication, show the...
Scalable and High-Fidelity Quantum Random Access Memory in Spin-Photon Networks
Kevin C. Chen, W. Dai, C. Errando-Herranz +2 more·Mar 13, 2021
A quantum random access memory (qRAM) is considered an essential computing unit to enable polynomial speedups in quantum information processing. Proposed implementations include using neutral atoms and superconducting circuits to construct a binary t...
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...
Low-Overhead Fault-Tolerant Quantum Error Correction with the Surface-GKP Code
Kyungjoo Noh, C. Chamberland, F. Brandão·Mar 11, 2021
Fault-tolerant quantum error correction is essential for implementing quantum algorithms of significant practical importance. In this work, we propose a highly effective use of the surface-GKP code, i.e., the surface code consisting of bosonic GKP qu...
Quantum machine learning with differential privacy
William Watkins, Samuel Yen-Chi Chen, Shinjae Yoo·Mar 10, 2021
Quantum machine learning (QML) can complement the growing trend of using learned models for a myriad of classification tasks, from image recognition to natural speech processing. There exists the potential for a quantum advantage due to the intractab...
Electric-dipole-induced resonance and decoherence of a dressed spin in a quantum dot
Peihao Huang, Xuedong Hu·Mar 10, 2021
Electron spin qubit in a quantum dot has been studied extensively for scalable quantum information processing over the past two decades. Recently, high-fidelity and fast single-spin control and strong spin-photon coupling have been demonstrated using...
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...
Machine Learning the period finding algorithm
J. Francis, Anil Shaji·Mar 9, 2021
We use differentiable programming and gradient descent to find unitary matrices that can be used in the period finding algorithm to extract period information from the state of a quantum computer post application of the oracle. The standard procedure...
Theoretical Realization of a Two Qubit Quantum Controlled-NOT Logic Gate and a Single Qubit Quantum Hadamard Logic Gate in the Anti-Jaynes-Cummings Model
Christopher Mayero, J. Omolo, S. Okeyo·Mar 4, 2021
Quantum gates are fundamental in Quantum computing for their role in manipulating elementary information carriers referred to as quantum bits. In this paper, a theoretical scheme for realizing a quantum Hadamard and a quantum controlled-NOT logic gat...
Quantum Metrology for Non-Markovian Processes.
A. Altherr, Yuxiang Yang·Mar 3, 2021
Quantum metrology is a rapidly developing branch of quantum technologies. While various theories have been established on quantum metrology for Markovian processes, i.e., quantum channel estimation, quantum metrology for non-Markovian processes is mu...
Filter-function formalism and software package to compute quantum processes of gate sequences for classical non-Markovian noise
Tobias Hangleiter, Pascal Cerfontaine, H. Bluhm·Mar 3, 2021
Correlated, non-Markovian noise is present in many solid-state systems employed as hosts for quantum information technologies, significantly complicating the realistic theoretical description of these systems. In this regime, the effects of noise on ...
Adiabatic Spectroscopy and a Variational Quantum Adiabatic Algorithm
Benjamin F. Schiffer, Jordi Tura i Brugués, J. Cirac·Mar 1, 2021
Preparing the ground state of a Hamiltonian is a problem of great significance in physics with deep implications in the field of combinatorial optimization. The adiabatic algorithm is known to return the ground state for sufficiently long preparation...
Quantum-dot-based deterministic photon–emitter interfaces for scalable photonic quantum technology
R. Uppu, L. Midolo, Xiaoyan Zhou +2 more·Mar 1, 2021
The scale-up of quantum hardware is fundamental to realize the full potential of quantum technology. Among a plethora of hardware platforms, photonics stands out: it provides a modular approach where the main challenges lie in the construction of hig...
Quantum circuits with many photons on a programmable nanophotonic chip
J. Arrazola, V. Bergholm, K. Br'adler +36 more·Mar 1, 2021
Growing interest in quantum computing for practical applications has led to a surge in the availability of programmable machines for executing quantum algorithms1,2. Present-day photonic quantum computers3–7 have been limited either to non-determinis...
MirrorME: implementation of an IoT based smart mirror through facial recognition and personalized information recommendation algorithm
Khandaker Mohammad Mohi Uddin, Samrat Kumar Dey, Gias Uddin Parvez +2 more·Feb 28, 2021
We are living in the era of the fourth industrial revolution, which also treated as 4IR or Industry 4.0. Generally, 4IR considered as the mixture of robotics, artificial intelligence (AI), quantum computing, the Internet of Things (IoT) and other fro...
Mutual information scaling for tensor network machine learning
Ian Convy, W. Huggins, Haoran Liao +1 more·Feb 27, 2021
Tensor networks have emerged as promising tools for machine learning, inspired by their widespread use as variational ansatze in quantum many-body physics. It is well known that the success of a given tensor network ansatz depends in part on how well...
Variational Learning for Quantum Artificial Neural Networks
F. Tacchino, Stefano Mangini, P. Barkoutsos +4 more·Feb 26, 2021
In the past few years, quantum computing and machine learning fostered rapid developments in their respective areas of application, introducing new perspectives on how information processing systems can be realized and programmed. The rapidly growing...