Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
28,188
This Month
0
Today
0
Research Volume
13,351 papers in 12 months (+7% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Optimized auxiliary oscillators for the simulation of general open quantum systems
F. Mascherpa, A. Smirne, D. Tamascelli +4 more·Apr 9, 2019
A method for the systematic construction of few-body damped harmonic oscillator networks accurately reproducing the effect of general bosonic environments in open quantum systems is presented. Under the sole assumptions of a Gaussian environment and ...
Study of Decoherence in Quantum Computers: A Circuit-Design Perspective
Abdullah Ash-Saki, M. Alam, Swaroop Ghosh·Apr 8, 2019
Decoherence of quantum states is a major hurdle towards scalable and reliable quantum computing. Lower decoherence (i.e., higher fidelity) can alleviate the error correction overhead and obviate the need for energy-intensive noise reduction technique...
Quantum circuit optimizations for NISQ architectures
Beatrice Nash, Vlad Gheorghiu, M. Mosca·Apr 3, 2019
Currently available quantum computing hardware platforms have limited 2-qubit connectivity among their addressable qubits. In order to run a generic quantum algorithm on such a platform, one has to transform the initial logical quantum circuit descri...
Quantum Advantage with Noisy Shallow Circuits in 3D
S. Bravyi, David Gosset, Robert Koenig +1 more·Apr 2, 2019
Prior work has shown that there exists a relation problem which can be solved with certainty by a constant-depth quantum circuit composed of geometrically local gates in two dimensions, but cannot be solved with high probability by any classical cons...
Generation of a time-frequency grid state with integrated biphoton frequency combs
N. Fabre, G. Maltese, F. Appas +9 more·Apr 2, 2019
Encoding quantum information in continuous variables is intrinsically faulty. Nevertheless, redundant qubits can be used for error correction, as proposed by Gottesman et al. [Phys. Rev. A 64 012310 (2001)]. We show how to experimentally implement th...
A quantum algorithm for evolving open quantum dynamics on quantum computing devices
Zixuan Hu, Rongxin Xia, S. Kais·Apr 1, 2019
Designing quantum algorithms for simulating quantum systems has seen enormous progress, yet few studies have been done to develop quantum algorithms for open quantum dynamics despite its importance in modeling the system-environment interaction found...
Quantum Generative Adversarial Networks for learning and loading random distributions
Christa Zoufal, Aurélien Lucchi, Stefan Woerner·Mar 29, 2019
Quantum algorithms have the potential to outperform their classical counterparts in a variety of tasks. The realization of the advantage often requires the ability to load classical data efficiently into quantum states. However, the best known method...
A fault-tolerant non-Clifford gate for the surface code in two dimensions
Benjamin J. Brown·Mar 27, 2019
We complete a universal set of fault-tolerant quantum logic gates for a two-dimensional surface code architecture. Fault-tolerant logic gates will consume a large proportion of the resources of a two-dimensional quantum computing architecture. Here w...
Extracting Success from IBM’s 20-Qubit Machines Using Error-Aware Compilation
S. Nishio, Yulu Pan, Takahiko Satoh +2 more·Mar 26, 2019
NISQ (Noisy, Intermediate-Scale Quantum) computing requires error mitigation to achieve meaningful computation. Our compilation tool development focuses on the fact that the error rates of individual qubits are not equal, with a goal of maximizing th...
Locally accurate MPS approximations for ground states of one-dimensional gapped local Hamiltonians
A. Dalzell, F. Brandão·Mar 25, 2019
A key feature of ground states of gapped local 1D Hamiltonians is their relatively low entanglement --- they are well approximated by matrix product states (MPS) with bond dimension scaling polynomially in the length N of the chain, while general sta...
Benchmarking an 11-qubit quantum computer
K. Wright, K. Beck, S. Debnath +21 more·Mar 19, 2019
The field of quantum computing has grown from concept to demonstration devices over the past 20 years. Universal quantum computing offers efficiency in approaching problems of scientific and commercial interest, such as factoring large numbers, searc...
Experimental Challenges of Implementing Quantum Phase Estimation Algorithms on IBM Quantum Computer
Hamed Mohammadbagherpoor, Young-Hyun Oh, Anand Singh +2 more·Mar 18, 2019
Many researchers have been heavily investigated on quantum phase estimation (QPE) algorithms to find the unknown phase, since QPE is the core building block of the most quantum algorithms such as the Shor's factoring algorithm, quantum sampling algor...
A quantum cellular automaton for one-dimensional QED
P. Arrighi, C. Bény, Terry Farrelly·Mar 17, 2019
We propose a discrete spacetime formulation of quantum electrodynamics in one dimension (a.k.a the Schwinger model) in terms of quantum cellular automata, i.e. translationally invariant circuits of local quantum gates. These have exact gauge covarian...
Universal variational quantum computation
J. Biamonte·Mar 11, 2019
Variational quantum algorithms dominate contemporary gate-based quantum enhanced optimisation [1], eigenvalue estimation [2] and machine learning [3]. Here we establish the quantum computational universality of variational quantum computation by deve...
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...
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...
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 ...
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...
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...
Experimental study of Shor's factoring algorithm using the IBM Q Experience
Mirko Amico, Zain Saleem, M. Kumph·Mar 2, 2019
We study the results of a compiled version of Shor's factoring algorithm on the ibmqx5 superconducting chip, for the particular case of $N=15$, $21$ and $35$. The semi-classical quantum Fourier transform is used to implement the algorithm with only a...