Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Exponential Improvement for Quantum Cooling through Finite-Memory Effects
Philip Taranto, F. Bakhshinezhad, Philipp Schüttelkopf +2 more·Apr 1, 2020
Practical implementations of quantum technologies require one to prepare physical states with a high degree of purity---or, in thermodynamic terms, very low temperatures. The ability to do so is restricted by the Third Law of thermodynamics, which pr...
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Ravi Anand, Arpita Maitra, S. Mukhopadhyay·Apr 1, 2020
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Beyond Product State Approximations for a Quantum Analogue of Max Cut
Anurag Anshu, David Gosset, Karen J. Morenz·Mar 31, 2020
We consider a computational problem where the goal is to approximate the maximum eigenvalue of a two-local Hamiltonian that describes Heisenberg interactions between qubits located at the vertices of a graph. Previous work has shed light on this prob...
Small quantum computers and large classical data sets
A. Harrow·Mar 31, 2020
We introduce hybrid classical-quantum algorithms for problems involving a large classical data set X and a space of models Y such that a quantum computer has superposition access to Y but not X. These algorithms use data reduction techniques to const...
Tunable Quantum Neural Networks for Boolean Functions
Viet Pham Ngoc, H. Wiklicky·Mar 31, 2020
In this paper we propose a new approach to quantum neural networks. Our multi-layer architecture avoids the use of measurements that usually emulate the non-linear activation functions which are characteristic of the classical neural networks. Despit...
No Free Lunch for Quantum Machine Learning
K. Poland, Kerstin Beer, T. Osborne·Mar 31, 2020
The ultimate limits for the quantum machine learning of quantum data are investigated by obtaining a generalisation of the celebrated No Free Lunch (NFL) theorem. We find a lower bound on the quantum risk (the probability that a trained hypothesis is...
End-To-End Quantum Machine Learning Implemented with Controlled Quantum Dynamics
R. Wu, Xi Cao, Pinchen Xie +1 more·Mar 30, 2020
This work presents a hardware-friendly end-to-end quantum machine learning scheme that can be implemented with imperfect near-term intermediate-scale quantum processors. The proposal transforms the machine learning task to the optimization of a quant...
A Roadmap for Automating the Selection of Quantum Computers for Quantum Algorithms
Marie Olivia Salm, Johanna Barzen, Uwe Breitenbucher +3 more·Mar 30, 2020
Quantum computing can enable a variety of breakthroughs in research and industry in the future. Although some quantum algorithms already exist that show a theoretical speedup compared to the best known classical algorithms, the implementation and exe...
Driven Dissipative Majorana Dark Spaces.
M. Gau, R. Egger, A. Zazunov +1 more·Mar 30, 2020
Pure quantum states can be stabilized in open quantum systems subject to external driving forces and dissipation by environmental modes. We show that driven dissipative (DD) Majorana devices offer key advantages for stabilizing degenerate state manif...
Moonshine, superconformal symmetry, and quantum error correction
J. Harvey, G. Moore·Mar 30, 2020
Special conformal field theories can have symmetry groups which are interesting sporadic finite simple groups. Famous examples include the Monster symmetry group of a c = 24 two-dimensional conformal field theory (CFT) constructed by Frenkel, Lepowsk...
Circuit optimization of Hamiltonian simulation by simultaneous diagonalization of Pauli clusters
E. Berg, K. Temme·Mar 30, 2020
Many applications of practical interest rely on time evolution of Hamiltonians that are given by a sum of Pauli operators. Quantum circuits for exact time evolution of single Pauli operators are well known, and can be extended trivially to sums of co...
Melting of the critical behavior of a Tomonaga-Luttinger liquid under dephasing
Jean-Sébastien Bernier, Ryan Tan, Chu Guo +2 more·Mar 30, 2020
Strongly correlated quantum systems often display universal behavior as, in certain regimes, their properties are found to be independent of the microscopic details of the underlying system. An example of such a situation is the Tomonaga-Luttinger li...
Quantum simulations of a qubit of space
Grzegorz Czelusta, J. Mielczarek·Mar 29, 2020
In loop quantum gravity approach to Planck scale physics, quantum geometry is represented by superposition of the so-called spin network states. In the recent literature, a class of spin networks promising from the perspective of quantum simulations ...
Fluctuation-enhanced quantum metrology.
Yu Chen, Hongzhen Chen, Jing Liu +2 more·Mar 29, 2020
The main obstacle for practical quantum technology is the noise, which can induce the decoherence and destroy the potential quantum advantages. The fluctuation of a field, which induces the dephasing of the system, is one of the most common noises an...
Solving Large‐Scale Linear Systems of Equations by a Quantum Hybrid Algorithm
M. Perelshtein, A. Pakhomchik, A. Melnikov +5 more·Mar 28, 2020
Today's intermediate‐scale quantum computers, although imperfect, already perform computational tasks that are manifestly beyond the capabilities of modern classical supercomputers. However, so far, quantum‐enabled large‐scale solutions have been rea...
A Hybrid Quantum-Classical Approach to Mitigating Measurement Errors in Quantum Algorithms
Hyeokjea Kwon, J. Bae·Mar 27, 2020
When noisy intermediate scalable quantum (NISQ) devices are applied in information processing, all of the stages through preparation, manipulation, and measurement of multipartite qubit states contain various types of noise that are generally hard to...
Hardware efficient quantum algorithms for vibrational structure calculations
Pauline J. Ollitrault, Alberto Baiardi, M. Reiher +1 more·Mar 27, 2020
We introduce a framework for the calculation of ground and excited state energies of bosonic systems suitable for near-term quantum devices and apply it to molecular vibrational anharmonic Hamiltonians.
Entanglement production and convergence properties of the variational quantum eigensolver
Andreas J. C. Woitzik, P. Barkoutsos, F. Wudarski +2 more·Mar 27, 2020
We perform a systematic investigation of variational forms (wave function Ansatze), to determine the ground state energies and properties of two-dimensional model fermionic systems on triangular lattices (with and without periodic boundary conditions...
Enabling Pulse-Level Programming, Compilation, and Execution in XACC
Thien Nguyen, A. McCaskey·Mar 26, 2020
Noisy gate-model quantum processing units (QPUs) are currently available from vendors over the cloud, and digital quantum programming approaches exist to run low-depth circuits on physical hardware. These digital representations are ultimately lowere...
Robust quantum minimum finding with an application to hypothesis selection
Yihui Quek, C. Canonne, P. Rebentrost·Mar 26, 2020
We consider the problem of finding the minimum element in a list of length $N$ using a noisy comparator. The noise is modelled as follows: given two elements to compare, if the values of the elements differ by at least $\alpha$ by some metric defined...