Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,673 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Classical algorithms for Forrelation
S. Bravyi, David Gosset, D. Grier +1 more·Feb 13, 2021
We study the forrelation problem: given a pair of $n$-bit Boolean functions $f$ and $g$, estimate the correlation between $f$ and the Fourier transform of $g$. This problem is known to provide the largest possible quantum speedup in terms of its quer...
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...
Pulse-Engineered Controlled-V Gate and Its Applications on Superconducting Quantum Device
Takahiko Satoh, Shun Oomura, M. Sugawara +1 more·Feb 11, 2021
In this article, we demonstrate that, by employing the OpenPulse design kit for IBM superconducting quantum devices, the controlled-V gate (cv gate) can be implemented in about half the gate time to the controlled-X gate (cx or cnot gate) and consequ...
Removing leakage-induced correlated errors in superconducting quantum error correction
M. McEwen, D. Kafri, Z. Chen +48 more·Feb 11, 2021
Quantum computing can become scalable through error correction, but logical error rates only decrease with system size when physical errors are sufficiently uncorrelated. During computation, unused high energy levels of the qubits can become excited,...
Focusing on the hybrid quantum computing - Tabu search algorithm: new results on the Asymmetric Salesman Problem
E. Osaba, Esther Villar-Rodriguez, I. Oregi +1 more·Feb 11, 2021
Quantum Computing is an emerging paradigm which is gathering a lot of popularity in the current scientific and technological community. Widely conceived as the next frontier of computation, Quantum Computing is still at the dawn of its development. T...
Dynamic compensation of stray electric fields in an ion trap using machine learning and adaptive algorithm
M. Ghadimi, Alexander Zappacosta, J. Scarabel +3 more·Feb 11, 2021
Surface ion traps are among the most promising technologies for scaling up quantum computing machines, but their complicated multi-electrode geometry can make some tasks, including compensation for stray electric fields, challenging both at the level...
Impact of graph structures for QAOA on MaxCut
R. Herrman, Lorna Treffert, James Ostrowski +3 more·Feb 11, 2021
The quantum approximate optimization algorithm (QAOA) is a promising method of solving combinatorial optimization problems using quantum computing. QAOA on the MaxCut problem has been studied extensively on graphs with specific structure; however, li...
Efficient simulation of ultrafast quantum nonlinear optics with matrix product states
Ryotatsu Yanagimoto, Edwin Ng, L. Wright +2 more·Feb 11, 2021
Ultra-short pulses propagating in nonlinear nanophotonic waveguides can simultaneously leverage both temporal and spatial field confinement, promising a route towards single-photon nonlinearities in an all-photonic platform. In this multimode quantum...
Exponential suppression of bit or phase errors with cyclic error correction
Zijun Chen, K. Satzinger, J. Atalaya +93 more·Feb 11, 2021
Realizing the potential of quantum computing requires sufficiently low logical error rates1. Many applications call for error rates as low as 10−15 (refs. 2–9), but state-of-the-art quantum platforms typically have physical error rates near 10−3 (ref...
Ultra-low-power second-order nonlinear optics on a chip
T. McKenna, H. Stokowski, V. Ansari +7 more·Feb 10, 2021
Second-order nonlinear optical processes convert light from one wavelength to another and generate quantum entanglement. Creating chip-scale devices to efficiently control these interactions greatly increases the reach of photonics. Existing silicon-...
Benchmarking Quantum Chemistry Computations with Variational, Imaginary Time Evolution, and Krylov Space Solver Algorithms
Kubra Yeter-Aydeniz, Bryan T. Gard, J. Jakowski +5 more·Feb 10, 2021
Quantum chemistry is a key application area for noisy‐intermediate scale quantum (NISQ) devices, and therefore serves as an important benchmark for current and future quantum computer performance. Previous benchmarks in this field have focused on var...
Estimation of Gaussian random displacement using non-Gaussian states
F. Hanamura, W. Asavanant, Kosuke Fukui +2 more·Feb 10, 2021
In continuous-variable quantum information processing, quantum error correction of Gaussian errors requires simultaneous estimation of both quadrature components of displacements on phase space. However, quadrature operators $x$ and $p$ are non-commu...
Learning k-qubit Quantum Operators via Pauli Decomposition
Mohsen Heidari, Wojtek Szpankowski·Feb 10, 2021
Motivated by the limited qubit capacity of current quantum systems, we study the quantum sample complexity of $k$-qubit quantum operators, i.e., operations applicable on only $k$ out of $d$ qubits. The problem is studied according to the quantum prob...
Average fidelity and fidelity deviation in noisy quantum teleportation
Wooyeong Song, Junghee Ryu, Kyunghyun Baek +1 more·Feb 10, 2021
We analyze the average fidelity (say, F) and the fidelity deviation (say, D) in noisy-channel quantum teleportation. Here, F represents how well teleportation is performed on average and D quantifies whether the teleportation is performed impartially...
Enabling multi-programming mechanism for quantum computing in the NISQ era
Siyuan Niu, A. Todri·Feb 10, 2021
NISQ devices have several physical limitations and unavoidable noisy quantum operations, and only small circuits can be executed on a quantum machine to get reliable results. This leads to the quantum hardware under-utilization issue. Here, we addres...
Layer VQE: A Variational Approach for Combinatorial Optimization on Noisy Quantum Computers
Xiaoyuan Liu, Anthony Angone, Ruslan Shaydulin +3 more·Feb 10, 2021
Combinatorial optimization on near-term quantum devices is a promising path to demonstrating quantum advantage. However, the capabilities of these devices are constrained by high noise or error rates. In this article, inspired by the variational quan...
Optomechanical interface between telecom photons and spin quantum memory
Prasoon K. Shandilya, D. Lake, Matthew Mitchell +2 more·Feb 9, 2021
Quantum networks enable a broad range of practical and fundamental applications spanning from distributed quantum computing to sensing and metrology. A cornerstone of such networks is an interface between telecom photons and quantum memories, which h...
Simulating Collider Physics on Quantum Computers Using Effective Field Theories.
C. Bauer, B. Nachman, M. Freytsis·Feb 9, 2021
Simulating the full dynamics of a quantum field theory over a wide range of energies requires exceptionally large quantum computing resources. Yet for many observables in particle physics, perturbative techniques are sufficient to accurately model al...
Energetic cost of Hamiltonian quantum gates
Sebastian Deffner·Feb 9, 2021
Landauer's principle laid the main foundation for the development of modern thermodynamics of information. However, in its original inception the principle relies on semiformal arguments and dissipative dynamics. Hence, if and how Landauer's principl...
Polynomial filter diagonalization of large Floquet unitary operators
D. J. Luitz·Feb 9, 2021
Periodically driven quantum many-body systems play a central role for our understanding of nonequilibrium phenomena. For studies of quantum chaos, thermalization, many-body localization and time crystals, the properties of eigenvectors and eigenvalue...