Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,745 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
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...
All-Gaussian Universality and Fault Tolerance with the Gottesman-Kitaev-Preskill Code.
B. Baragiola, Giacomo Pantaleoni, R. N. Alexander +2 more·Mar 1, 2019
The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator is particularly appealing for fault-tolerant quantum computing with bosons because Gaussian operations on encoded Pauli eigenstates enable Clifford quantum computing with er...
A Quantum Annealing-Based Approach to Extreme Clustering
Tim Jaschek, J. S. Oberoi·Mar 1, 2019
Clustering, or grouping, dataset elements based on similarity can be used not only to classify a dataset into a few categories, but also to approximate it by a relatively large number of representative elements. In the latter scenario, referred to as...
Reversible Pebbling Game for Quantum Memory Management
Giulia Meuli, Mathias Soeken, M. Rötteler +2 more·Mar 1, 2019
Quantum memory management is becoming a pressing problem, especially given the recent research effort to develop new and more complex quantum algorithms. The only existing automatic method for quantum states clean-up relies on the availability of man...
Bounding and Estimating the Classical Information Rate of Quantum Channels With Memory
Michael X. Cao, P. Vontobel·Mar 1, 2019
We consider the scenario of classical communication over a finite-dimensional quantum channel with memory using a separable-state input ensemble and local output measurements. We propose algorithms for estimating the information rate of such communic...
Efficient classical simulation of Clifford circuits with nonstabilizer input states
Kaifeng Bu, Dax Enshan Koh·Feb 28, 2019
We investigate the problem of evaluating the output probabilities of Clifford circuits with nonstabilizer product input states. First, we consider the case when the input state is mixed, and give an efficient classical algorithm to approximate the ou...
Tensor Product Approach to Quantum Control
D. Q. Valles, S. Dolgov, D. Savostyanov·Feb 28, 2019
In this proof-of-concept paper we show that tensor product approach is efficient for control of large quantum systems, such as Heisenberg spin wires, which are essential for emerging quantum computing technologies. We compute optimal control sequence...
Generalized XOR non-locality games with graph description on a square lattice
Monika Rosicka, P. Mazurek, A. Grudka +1 more·Feb 28, 2019
We propose a family of non-locality unique games for two parties based on a square lattice on an arbitrary surface. We show that, due to structural similarities with error correction codes of Kitaev for fault tolerant quantum computation, the games h...
Improved Fault-Tolerant Quantum Simulation of Condensed-Phase Correlated Electrons via Trotterization
I. Kivlichan, C. Gidney, D. Berry +9 more·Feb 27, 2019
Recent work has deployed linear combinations of unitaries techniques to reduce the cost of fault-tolerant quantum simulations of correlated electron models. Here, we show that one can sometimes improve upon those results with optimized implementation...
Hacking Quantum Key Distribution via Injection Locking
Xiao-Ling Pang, Ai-Lin Yang, Chao-Ni Zhang +4 more·Feb 27, 2019
Unconditionally secure communication, being pursued for thousands of years, however, hasn't been reached yet due to continuous competitions between encryption and hacking. Quantum key distribution (QKD), harnessing the quantum mechanical nature of su...
Electron spin relaxations of phosphorus donors in bulk silicon under large electric field
D. Park, Sejun Park, Hyejung H. Jee +1 more·Feb 27, 2019
Modulation of donor electron wavefunction via electric fields is vital to quantum computing architectures based on donor spins in silicon. For practical and scalable applications, the donor-based qubits must retain sufficiently long coherence times i...
Entangling spins in double quantum dots and Majorana bound states
Marko J. Ranvci'c, S. Hoffman, C. Schrade +2 more·Feb 26, 2019
We study the coupling between a singlet-triplet qubit realized in a double quantum dot to a topological qubit realized by spatially well-separated Majorana bound states. We demonstrate that the singlet-triplet qubit can be leveraged for readout of th...
Ground-state energy estimation of the water molecule on a trapped ion quantum computer
Y. Nam, Jwo-Sy Chen, N. Pisenti +23 more·Feb 26, 2019
Quantum computing leverages the quantum resources of superposition and entanglement to efficiently solve computational problems considered intractable for classical computers. Examples include calculating molecular and nuclear structure, simulating s...
Quantum computer with cold ions in the Aubry pinned phase
D. Shepelyansky·Feb 26, 2019
It is proposed to modify the Cirac-Zoller proposal of quantum computer with cold ions in a global oscillator trap potential by adding a periodic potential with an incommensurate average ratio of number of ions to number of periods being order of unit...
Operation of a silicon quantum processor unit cell above one kelvin
C. Yang, R. Leon, J. C. Hwang +12 more·Feb 25, 2019
Quantum computers are expected to outperform conventional computers in several important applications, from molecular simulation to search algorithms, once they can be scaled up to large numbers—typically millions—of quantum bits (qubits)1–3. For mos...
Quantum speedup of twin support vector machines
Zekun Ye, Lvzhou Li, Haozhen Situ +1 more·Feb 24, 2019
We devise new quantum algorithms that exponentially speeds up the training and prediction procedures of twin support vector machines (TSVM). To train TSVMs using quantum methods, we demonstrate how to prepare the desired input states according to cla...
Quantum learning Boolean linear functions w.r.t. product distributions
Matthias C. Caro·Feb 23, 2019
The problem of learning Boolean linear functions from quantum examples w.r.t. the uniform distribution can be solved on a quantum computer using the Bernstein–Vazirani algorithm (Bernstein and Vazirani, in: Kosaraju (ed) Proceedings of the twenty-fif...
Multipartite Entanglement Generation and Contextuality Tests Using Nondestructive Three-Qubit Parity Measurements.
S. V. Dam, J. Cramer, T. Taminiau +1 more·Feb 23, 2019
We report on the realization and application of nondestructive three-qubit parity measurements on nuclear spin qubits in diamond. We use high-fidelity quantum logic to map the parity of the joint state of three nuclear spin qubits onto an electronic ...
A Pattern Recognition Algorithm for Quantum Annealers
Frédéric Bapst, W. Bhimji, P. Calafiura +4 more·Feb 22, 2019
The reconstruction of charged particles will be a key computing challenge for the high-luminosity Large Hadron Collider (HL-LHC) where increased data rates lead to a large increase in running time for current pattern recognition algorithms. An altern...
A quantum solution for efficient use of symmetries in the simulation of many-body systems
A. Schmitz, S. Johri·Feb 22, 2019
A many-body Hamiltonian can be block-diagonalized by expressing it in terms of symmetry-adapted basis states. Finding the group orbit representatives of these basis states and their corresponding symmetries is currently a memory/computational bottlen...