Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,745 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A Lightweight McEliece Cryptosystem Co-processor Design
Lake Bu, R. Agrawal, Hai Cheng +1 more·Mar 9, 2019
Due to the rapid advances in the development of quantum computers and their susceptibility to errors, there is a renewed interest in error correction algorithms. In particular, error correcting code-based cryptosystems have reemerged as a highly desi...
Formal Constraint-based Compilation for Noisy Intermediate-Scale Quantum Systems
Prakash Murali, Ali Javadi-Abhari, F. Chong +1 more·Mar 8, 2019
Abstract Noisy, intermediate-scale quantum (NISQ) systems are expected to have a few hundred qubits, minimal or no error correction, limited connectivity and limits on the number of gates that can be performed within the short coherence window of the...
Quantized conductance of one-dimensional strongly correlated electrons in an oxide heterostructure
H. Hou, Y. Kozuka, Y. Kozuka +9 more·Mar 8, 2019
Oxide heterostructures are versatile platforms with which to research and create novel functional nanostructures. We successfully develop one-dimensional (1D) quantum-wire devices using quantum point contacts on MgZnO/ZnO heterostructures and observe...
Introduction to Coding Quantum Algorithms: A Tutorial Series Using Qiskit
Daniel Koch, L. Wessing, P. Alsing·Mar 7, 2019
As the field of Quantum Computing continues to grow, so too has the general public’s interest in testing some of the publicly available quantum computers. However, many might find learning all of the supplementary information that goes into quantum a...
Estimation and uncertainty quantification for the output from quantum simulators
R. Bennink, A. Jasra, K. Law +1 more·Mar 7, 2019
The problem of estimating certain distributions over {0, 1}d is considered here. The distribution represents a quantum system of d qubits, where there are non-trivial dependencies between the qubits. A maximum entropy approach is adopted to reconstru...
Introduction to Coding Quantum Algorithms: A Tutorial Series Using Pyquil
Daniel Koch, L. Wessing, P. Alsing·Mar 7, 2019
As the field of Quantum Computing continues to grow, so too has the general public's interest in testing some of the publicly available quantum computers. However, many might find learning all of the supplementary information that goes into quantum a...
Inverse engineering of shortcut pulses for high fidelity initialization on qubits closely spaced in frequency.
Ying Yan, Yi-Chao Li, A. Kinos +6 more·Mar 7, 2019
High-fidelity qubit initialization is of significance for efficient error correction in fault tolerant quantum algorithms. Combining two best worlds, speed and robustness, to achieve high-fidelity state preparation and manipulation is challenging in ...
Quantum simulation of negative hydrogen ion using variational quantum eigensolver on IBM quantum computer
Shubham Kumar, R. P. Singh, B. K. Behera +1 more·Mar 7, 2019
The negative hydrogen ion is the first three body quantum problem whose ground state energy is calculated using the `Chandrasekhar Wavefunction' that accounts for the electron-electron correlation. Solving multi-body systems is a daunting task in qua...
Quantum hardness of learning shallow classical circuits
Srinivasan Arunachalam, A. Grilo, Aarthi Sundaram·Mar 7, 2019
In this paper we study the quantum learnability of constant-depth classical circuits under the uniform distribution and in the distribution-independent framework of PAC learning. In order to attain our results, we establish connections between quantu...
Quantum Link Prediction in Complex Networks
João P. Moutinho, André Melo, B. Coutinho +2 more·Mar 7, 2019
Predicting new links in physical, biological, social, or technological networks has a significant scientific and societal impact. Path-based link prediction methods utilize explicit counting of even and odd-length paths between nodes to quantify a sc...
Satellite Quantum Communications When Man-in-the-Middle Attacks Are Excluded
Tom Vergoossen, R. Bedington, J. Grieve +1 more·Mar 6, 2019
An application of quantum communications is the transmission of qubits to create shared symmetric encryption keys in a process called quantum key distribution (QKD). Contrary to public-private key encryption, symmetric encryption is considered safe f...
Robust fault tolerance for continuous-variable cluster states with excess antisqueezing
B. W. Walshe, Lucas J. Mensen, B. Baragiola +1 more·Mar 6, 2019
The immense scalability of continuous-variable cluster states motivates their study as a platform for quantum computing, with fault tolerance possible given sufficient squeezing and appropriately encoded qubits [Menicucci, PRL 112, 120504 (2014)]. He...
Channel Decoding with Quantum Approximate Optimization Algorithm
Toshiki Matsumine, T. Koike-Akino, Ye Wang·Mar 6, 2019
Motivated by the recent advancement of quantum processors, we investigate quantum approximate optimization algorithm (QAOA) to employ quasi-maximum-likelihood (ML) decoding of classical channel codes. QAOA is a hybrid quantum-classical variational al...
Distributed Routing in a Quantum Internet
Kaushik Chakraborty, F. Rozpędek, A. Dahlberg +1 more·Mar 6, 2019
We develop new routing algorithms for a quantum network with noisy quantum devices such that each can store a small number of qubits. We thereby consider two models for the operation of such a network. The first is a continuous model, in which entang...
Relations between the single-pass and multi-pass qubit probabilities
N. Vitanov·Mar 6, 2019
In quantum computation the target fidelity of the qubit gates is very high, with the admissible error being in the range from $10^{-3}$ to $10^{-4}$ and even less, depending on the protocol. The direct experimental determination of such an extremely ...
Information-theoretic aspects of the generalized amplitude-damping channel
Sumeet Khatri, Kunal Sharma, M. Wilde·Mar 5, 2019
The generalized amplitude damping channel (GADC) is one of the sources of noise in superconducting-circuit-based quantum computing. It can be viewed as the qubit analogue of the bosonic thermal channel, and it thus can be used to model lossy processe...
Efficient Quantum Error Correction of Dephasing Induced by a Common Fluctuator.
David Layden, Mo Chen, P. Cappellaro·Mar 4, 2019
Quantum error correction is expected to be essential in large-scale quantum technologies. However, the substantial overhead of qubits it requires is thought to greatly limit its utility in smaller, near-term devices. Here we introduce a new family of...
Low-Depth Quantum Metropolis Algorithm
J. Moussa·Mar 4, 2019
We construct a simple quantum version of the classical Metropolis algorithm to prepare and observe quantum thermal states. It induces both a quantum Markov chain that mixes the quantum thermal state and a classical Markov chain that mixes its observa...
Demonstration of a Nonstoquastic Hamiltonian in Coupled Superconducting Flux Qubits
I. Ozfidan, C. Deng, A. Smirnov +45 more·Mar 4, 2019
Quantum annealing (QA) is a heuristic algorithm for finding low-energy configurations of a system, with applications in optimization, machine learning, and quantum simulation. Up to now, all implementations of QA have been limited to qubits coupled v...
Microwave-based arbitrary CPHASE gates for transmon qubits.
George S. Barron, Fernando A. Calderon-Vargas, J. Long +2 more·Mar 3, 2019
Superconducting transmon qubits are of great interest for quantum computing and quantum simulation. A key component of quantum chemistry simulation algorithms is breaking up the evolution into small steps, which naturally leads to the need for nonmax...