Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Behavior of Analog Quantum Algorithms.
L. Brady, L. Kocia, P. Bienias +3 more·Mar 1, 2021
Analog quantum algorithms are formulated in terms of Hamiltonians rather than unitary gates and include quantum adiabatic computing, quantum annealing, and the quantum approximate optimization algorithm (QAOA). These algorithms are promising candidat...
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...
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...
Entanglement across separate silicon dies in a modular superconducting qubit device
Alysson Gold, J. Paquette, A. Stockklauser +15 more·Feb 26, 2021
Assembling future large-scale quantum computers out of smaller, specialized modules promises to simplify a number of formidable science and engineering challenges. One of the primary challenges in developing a modular architecture is in engineering h...
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...
Cross-Cross Resonance Gate
K. Heya, Naoki Kanazawa·Feb 26, 2021
Implementation of high-fidelity swapping operations is of vital importance to execute quantum algorithms on a quantum processor with limited connectivity. We present an efficient pulse control technique, cross-cross resonance (CCR) gate, to implement...
Area-Law Entangled Eigenstates from Nullspaces of Local Hamiltonians.
Volker Karle, Maksym Serbyn, A. Michailidis·Feb 26, 2021
Eigenstate thermalization in quantum many-body systems implies that eigenstates at high energy are similar to random vectors. Identifying systems where at least some eigenstates are nonthermal is an outstanding question. In this Letter we show that i...
Large-Scale Quantum Approximate Optimization via Divide-and-Conquer
Junde Li, M. Alam, Swaroop Ghosh·Feb 26, 2021
Quantum approximate optimization algorithm (QAOA) is a promising hybrid quantum-classical algorithm for solving combinatorial optimization problems. However, it cannot overcome qubit limitation for large-scale problems. Furthermore, the simulation ti...
Demonstration of a quantum advantage by a joint detection receiver for optical communication using quantum belief propagation on a trapped-ion device
Conor Delaney, K. Seshadreesan, I. MacCormack +3 more·Feb 25, 2021
Demonstrations of quantum advantage have largely focused on computational speedups and on quantum simulation of many-body physics, limited by fidelity and capability of current devices. Discriminating laser-pulse-modulated classical-communication code...
Randomized Benchmarking with Stabilizer Verification and Gate Synthesis
E. Derbyshire, R. Mezher, Theodoros Kapourniotis +1 more·Feb 25, 2021
Recently, there has been an emergence of useful applications for noisy intermediate-scale quantum (NISQ) devices notably, though not exclusively, in the fields of quantum machine learning and variational quantum algorithms. In such applications, circ...
QNLP in Practice: Running Compositional Models of Meaning on a Quantum Computer
Robin Lorenz, A. Pearson, K. Meichanetzidis +2 more·Feb 25, 2021
Quantum Natural Language Processing (QNLP) deals with the design and implementation of NLP models intended to be run on quantum hardware. In this paper, we present results on the first NLP experiments conducted on Noisy Intermediate-Scale Quantum (NI...
Control of Scanning Quantum Dot Microscopy
Michael Maiworm, C. Wagner, T. Esat +4 more·Feb 25, 2021
Scanning quantum dot microscopy is a recently developed high-resolution microscopy technique that is based on atomic force microscopy and is capable of imaging the electrostatic potential of nanostructures like molecules or single atoms. Recently, it...
An algorithm to factorize quantum walks into shift and coin operations
C. Cedzich, T. Geib, R. Werner·Feb 25, 2021
We provide an algorithm that factorizes one-dimensional quantum walks on an arbitrary but fixed cell structure into a protocol of two basic operations: a fixed conditional shift that transports particles between cells and suitable coin operators that...
Benchmarking Quantum Coprocessors in an Application-Centric, Hardware-Agnostic, and Scalable Way
S. Martiel, T. Ayral, Cyril Allouche·Feb 25, 2021
Existing protocols for benchmarking current quantum coprocessors fail to meet the usual standards for assessing the performance of high-performance-computing platforms. After a synthetic review of these protocols—whether at the gate, circuit, or appl...
Logical-qubit operations in an error-detecting surface code
J. Marques, B. Varbanov, M. Moreira +10 more·Feb 25, 2021
Future fault-tolerant quantum computers will require storing and processing quantum data in logical qubits. Here we realize a suite of logical operations on a distance-2 surface code qubit built from seven physical qubits and stabilized using repeate...
Continuous-variable multipartite vibrational entanglement
M. Abdi·Feb 25, 2021
A compact scheme for the preparation of macroscopic multipartite entanglement is proposed and analyzed. In this scheme the vibrational modes of a mechanical resonator constitute continuous variable (CV) subsystems that entangle to each other as a res...
Quantum Circuits for Exact Unitary t -Designs and Applications to Higher-Order Randomized Benchmarking
Y. Nakata, Da Zhao, T. Okuda +9 more·Feb 25, 2021
A unitary $t$-design is a powerful tool in quantum information science and fundamental physics. Despite its usefulness, only approximate implementations were known for general $t$. In this paper, we provide for the first time quantum circuits that ge...
Imaginary Time Propagation on a Quantum Chip
F. Turro, A. Roggero, Valentina Amitrano +5 more·Feb 24, 2021
Evolution in imaginary time is a prominent technique for finding the ground state of quantum many-body systems, and the heart of a number of numerical methods that have been used with great success in quantum chemistry, condensed matter and nuclear p...
Binary Subspace Chirps
Tefjol Pllaha, O. Tirkkonen, R. Calderbank·Feb 24, 2021
We describe in detail the interplay between binary symplectic geometry and notions from quantum computation, with the ultimate goal of constructing highly structured codebooks. The Binary Chirps (BCs) are Complex Grassmannian Lines in <inline-formula...