Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,744 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Incorporation of random alloy GaBixAs1−x barriers in InAs quantum dot molecules: Energy levels and confined hole states
A. Lin, M. Doty, G. Bryant·Oct 22, 2018
Self-assembled InAs quantum dots (QDs), which have long hole-spin coherence times and are amenable to optical control schemes, have long been explored as building blocks for qubit architectures. One such design consists of vertically stacking two QDs...
Quantum annealing learning search for solving QUBO problems
D. Pastorello, E. Blanzieri·Oct 22, 2018
In this paper, we present a novel strategy to solve optimization problems within a hybrid quantum-classical scheme based on quantum annealing, with a particular focus on QUBO problems. The proposed algorithm implements an iterative structure where th...
2D quantum computation with 3D topological codes
H. Bombin·Oct 22, 2018
I present a fault-tolerant quantum computing method for 2D architectures that is particularly appealing for photonic qubits. It relies on a crossover of techniques from topological stabilizer codes and measurement based quantum computation. In partic...
Subspace-search variational quantum eigensolver for excited states
Ken M. Nakanishi, K. Mitarai, K. Fujii·Oct 22, 2018
The variational quantum eigensolver (VQE), a variational algorithm to obtain an approximated ground state of a given Hamiltonian, is an appealing application of near-term quantum computers. The original work [A. Peruzzo et al.; \textit{Nat. Commun.};...
PQC: Triple Decomposition Problem Applied To GL(d, Fp) - A Secure Framework For Canonical Non-Commutative Cryptography
P. Hecht·Oct 21, 2018
Post-Quantum Cryptography (PQC) attempts to find cryptographic protocols resistant to attacks using Shor polynomial time algorithm for numerical field problems or Grover search algorithm. A mostly overlooked but valuable line of solutions is provided...
Reverse quantum annealing approach to portfolio optimization problems
D. Venturelli, A. Kondratyev·Oct 19, 2018
We investigate a hybrid quantum-classical solution method to the mean-variance portfolio optimization problems. Starting from real financial data statistics and following the principles of the Modern Portfolio Theory, we generate parametrized samples...
Quantum error correction with the semion code
G. Dauphinais, L. Ortiz, S. Varona +1 more·Oct 19, 2018
We present a full quantum error correcting procedure with the semion code: an off-shell extension of the double-semion model. We construct open-string operators that recover the quantum memory from arbitrary errors and closed-string operators that im...
Holographic quantum information and (de)confinement
A. Patrascu·Oct 18, 2018
Analysing the phenomenon of deconfinement from a holographic point of view, it appears that the brane configuration in the bulk, corresponding to the confinement phase imposes a restriction on the strength of the holographic quantum error correction ...
Qubit Allocation for Noisy Intermediate-Scale Quantum Computers
Will Finigan, Michael Cubeddu, Thomas Lively +2 more·Oct 18, 2018
In the era of noisy-intermediate-scale quantum computers, we expect to see quantum devices with increasing numbers of qubits emerge in the foreseeable future. To practically run quantum programs, logical qubits have to be mapped to the physical qubit...
Minimal nonorthogonal gate decomposition for qubits with limited control
Xiao-Ming Zhang, Jianan Li, Xin Wang +1 more·Oct 17, 2018
In quantum control theory, a question of fundamental and practical interest is how an arbitrary unitary transformation can be decomposed into minimum number of elementary rotations for implementation, subject to various physical constraints. Examples...
Controlling error orientation to improve quantum algorithm success rates
Daniel Murphy, K. Brown·Oct 17, 2018
The success probability of a quantum algorithm constructed from noisy quantum gates cannot be accurately predicted from single parameter metrics that compare noisy and ideal gates. We illustrate this concept by examining a system with coherent errors...
Chip-Integrated Voltage Sources for Control of Trapped Ions
J. Stuart, R. Panock, C. Bruzewicz +5 more·Oct 16, 2018
Trapped-ion quantum information processors offer many advantages for achieving high-fidelity operations on a large number of qubits, but current experiments require bulky external equipment for classical and quantum control of many ions. We demonstra...
Spin Foam Vertex Amplitudes on Quantum Computer—Preliminary Results
J. Mielczarek·Oct 16, 2018
Vertex amplitudes are elementary contributions to the transition amplitudes in the spin foam models of quantum gravity. The purpose of this article is to make the first step towards computing vertex amplitudes with the use of quantum algorithms. In o...
Reinforcement learning decoders for fault-tolerant quantum computation
R. Sweke, Markus S. Kesselring, E. van Nieuwenburg +1 more·Oct 16, 2018
Topological error correcting codes, and particularly the surface code, currently provide the most feasible road-map towards large-scale fault-tolerant quantum computation. As such, obtaining fast and flexible decoding algorithms for these codes, with...
Scaled Quantum Circuits Emulated with Room Temperature p-Bits
Kerem Y Çamsarı, S. Chowdhury, S. Datta·Oct 16, 2018
Exploiting a well-established mapping from a d-dimensional quantum Hamiltonian to a d+1dimensional classical Hamiltonian that is commonly used in software quantum Monte Carlo algorithms, we propose a scalable hardware emulator where quantum circuits ...
Experimental Reconstruction of Entanglement Quasiprobabilities.
J. Sperling, E. Meyer-Scott, S. Barkhofen +2 more·Oct 16, 2018
We report on the first experimental reconstruction of an entanglement quasiprobability. In contrast to related techniques, the negativities in our distributions are a necessary and sufficient identifier of separability and entanglement and enable a f...
Quantum simulation of clustered photosynthetic light harvesting in a superconducting quantum circuit
M. Tao, Ming Hua, N. Zhang +3 more·Oct 13, 2018
We propose a scheme to simulate the exciton energy transfer (EET) of photosynthetic complexes in a quantum superconducting circuit system. Our system is composed of two pairs of superconducting charge qubits coupled to two separated high-Q supercondu...
Error Estimation at the Information Reconciliation Stage of Quantum Key Distribution
E. Kiktenko, A. O. Malyshev, A. A. Bozhedarov +3 more·Oct 13, 2018
Quantum key distribution (QKD) offers a practical solution for secure communication between two distinct parties via a quantum channel and an authentic public channel. In this work, we consider different approaches to the quantum bit error rate (QBER...
Topographic Representation for Quantum Machine Learning
B. MacLennan·Oct 13, 2018
This paper proposes a brain-inspired approach to quantum machine learning with the goal of circumventing many of the complications of other approaches. The fact that quantum processes are unitary presents both opportunities and challenges. A principa...
Probing Context-Dependent Errors in Quantum Processors
K. Rudinger, T. Proctor, Dylan Langharst +3 more·Oct 12, 2018
Gates in error-prone quantum information processors are often modeled using sets of one- and two-qubit process matrices, the standard model of quantum errors. However, the results of quantum circuits on real processors often depend on additional exte...