Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,854 papers in 12 months (-35% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Proposal for Quantum Simulation via All-Optically-Generated Tensor Network States.
Ish Dhand, M. Engelkemeier, L. Sansoni +3 more·Oct 17, 2017
We devise an all-optical scheme for the generation of entangled multimode photonic states encoded in temporal modes of light. The scheme employs a nonlinear down-conversion process in an optical loop to generate one- and higher-dimensional tensor net...
Majorization and the time complexity of linear optical networks
Seungbeom Chin, J. Huh·Oct 16, 2017
This work shows that the majorization of photon distributions is related to the runtime of classically simulating multimode passive linear optics, which explains one aspect of the boson sampling hardness. A Shur-concave quantity which we name the Bol...
Breaking the 49-Qubit Barrier in the Simulation of Quantum Circuits
E. Pednault, John A. Gunnels, G. Nannicini +6 more·Oct 16, 2017
With the current rate of progress in quantum computing technologies, systems with more than 50 qubits will soon become reality. Computing ideal quantum state amplitudes for devices of such and larger sizes is a fundamental step to assess their fideli...
Quantum Query Complexity of Entropy Estimation
Tongyang Li, Xiaodi Wu·Oct 16, 2017
Estimation of Shannon and Rényi entropies of unknown discrete distributions is a fundamental problem in statistical property testing. In this paper, we give the first quantum algorithms for estimating <inline-formula> <tex-math notation="LaTeX">$\alp...
Robust quantum control for adiabatic quantum computation
G. Quiroz·Oct 16, 2017
Properly designed control has been shown to be particularly advantageous for improving adiabatic quantum computation (AQC) accuracy and time complexity scaling. Here, an in situ quantum control optimization protocol is developed to indirectly optimiz...
Optimally stopped variational quantum algorithms
W. Vinci, A. Shabani·Oct 15, 2017
Quantum processors promise a paradigm shift in high-performance computing which needs to be assessed by accurate benchmarking measures. In this work, we introduce a new benchmark for variational quantum algorithm (VQA), recently proposed as a heurist...
Quantum Locker Using a Novel Verification Algorithm and Its Experimental Realization in IBM Quantum Computer
Avinash Dash, Sumit Rout, B. K. Behera +1 more·Oct 14, 2017
It is well known that Grover's algorithm asymptotically transforms an equal superposition state into an eigenstate (of a given basis). Here, we demonstrate a verification algorithm based on weak measurement which can achieve the same purpose even if ...
Machine learning by unitary tensor network of hierarchical tree structure
Ding Liu, Shi-Ju Ran, P. Wittek +4 more·Oct 13, 2017
The resemblance between the methods used in quantum-many body physics and in machine learning has drawn considerable attention. In particular, tensor networks (TNs) and deep learning architectures bear striking similarities to the extent that TNs can...
Analysis of measurement-based quantum network coding over repeater networks under noisy conditions
Takaaki Matsuo, Takahiko Satoh, Shota Nagayama +1 more·Oct 13, 2017
Quantum network coding is an effective solution for alleviating bottlenecks in quantum networks. We introduce a measurement-based quantum network coding scheme for quantum repeater networks (MQNC), and analyze its behavior based on results acquired f...
Adiabatic passage of radio-frequency-assisted Förster resonances in Rydberg atoms for two-qubit gates and the generation of Bell states
I. Beterov, G. Hamzina, E. Yakshina +3 more·Oct 12, 2017
High-fidelity entangled Bell states are of great interest in quantum physics. Entanglement of ultracold neutral atoms in two spatially separated optical dipole traps is promising for implementation of quantum computing and quantum simulation and for ...
Quantum Error Correcting Codes in Eigenstates of Translation-Invariant Spin Chains.
F. Brandão, E. Crosson, M. B. Şahinoğlu +1 more·Oct 12, 2017
Quantum error correction was invented to allow for fault-tolerant quantum computation. Systems with topological order turned out to give a natural physical realization of quantum error correcting codes (QECC) in their ground spaces. More recently, in...
Benchmarking non-simulable quantum processes via symmetry conservation
T. Chasseur, F. Motzoi, Michael P. Kaicher +2 more·Oct 12, 2017
As quantum devices scale up, many-body quantum gates and algorithms begin to surpass what is possible to simulate classically. Validation methods which rely on such classical simulation, such as process tomography and randomized benchmarking, cannot ...
Programmable and scalable radio-frequency pulse sequence generator for multi-qubit quantum information experiments
B. Keitch, V. Negnevitsky, Weida Zhang·Oct 11, 2017
We present a versatile rf pulse control system that has been designed for multi-qubit quantum experiments. One instrument can be scaled to provide 32 channels of rf between 10 - 450 MHz. Synchronization can be achieved across multiple instruments. By...
Back to the seminal Deutsch algorithm
G. Castagnoli·Oct 11, 2017
A bare description of the seminal quantum algorithm devised by Deutsch could mean more than an introduction to quantum computing. It could contribute to opening the field to interdisciplinary research.
Optimal control of hybrid qubits: Implementing the quantum permutation algorithm
C. M. Rivera-Ruiz, E. Lima, F. Fanchini +2 more·Oct 11, 2017
The optimal quantum control theory is employed to determine electric pulses capable of producing quantum gates with high fidelity (higher than 0.9997). Particularly, these quantum gates were chosen to perform the permutation algorithm (Z. Gedik et al...
Quantum Hopfield neural network
P. Rebentrost, T. Bromley, C. Weedbrook +1 more·Oct 10, 2017
Quantum computing allows for the potential of significant advancements in both the speed and the capacity of widely used machine learning techniques. Here we employ quantum algorithms for the Hopfield network, which can be used for pattern recognitio...
A quantum light-emitting diode for the standard telecom window around 1,550 nm
T. Müller, J. Skiba-Szymanska, A. Krysa +9 more·Oct 10, 2017
Single photons and entangled photon pairs are a key resource of many quantum secure communication and quantum computation protocols, and non-Poissonian sources emitting in the low-loss wavelength region around 1,550 nm are essential for the developme...
NMRCloudQ: a quantum cloud experience on a nuclear magnetic resonance quantum computer.
T. Xin, Shilin Huang, Sirui Lu +7 more·Oct 10, 2017
Cloud-based quantum computing is anticipated to be the most useful and reachable form for public users to experience with the power of quantum. As initial attempts, IBM Q has launched influential cloud services on a superconducting quantum processor ...
Quantum trajectories for time-dependent adiabatic master equations
K. Yip, T. Albash, Daniel A. Lidar·Oct 10, 2017
We develop a quantum trajectories technique for the unraveling of the quantum adiabatic master equation in Lindblad form. By evolving a complex state vector of dimension $N$ instead of a complex density matrix of dimension $N^2$, simulations of large...
Learning time-dependent noise to reduce logical errors: real time error rate estimation in quantum error correction
M. Huo, Ying Li·Oct 10, 2017
Quantum error correction is important to quantum information processing, which allows us to reliably process information encoded in quantum error correction codes. Efficient quantum error correction benefits from the knowledge of error rates. We prop...