Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,714
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Research Volume
15,734 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Transforming graph states using single-qubit operations
A. Dahlberg, S. Wehner·May 14, 2018
Stabilizer states form an important class of states in quantum information, and are of central importance in quantum error correction. Here, we provide an algorithm for deciding whether one stabilizer (target) state can be obtained from another stabi...
Fidelity benchmarks for two-qubit gates in silicon
W. Huang, C. Yang, K. Chan +11 more·May 14, 2018
Universal quantum computation will require qubit technology based on a scalable platform1, together with quantum error correction protocols that place strict limits on the maximum infidelities for one- and two-qubit gate operations2,3. Although vario...
How to transform graph states using single-qubit operations: computational complexity and algorithms
A. Dahlberg, J. Helsen, S. Wehner·May 14, 2018
Graph states are ubiquitous in quantum information with diverse applications ranging from quantum network protocols to measurement based quantum computing. Here we consider the question whether one graph (source) state can be transformed into another...
Information-theoretic meaning of quantum information flow and its applications to amplitude amplification algorithms
S. Roy, J. Bae·May 14, 2018
The advantages of quantum information processing are in many cases obtained as consequences of quantum interactions, especially for computational tasks where two-qubit interactions are essential. In this work, we establish the framework of analyzing ...
Massively parallel quantum computer simulator, eleven years later
H. Raedt, F. Jin, D. Willsch +5 more·May 12, 2018
A revised version of the massively parallel simulator of a universal quantum computer, described in this journal eleven years ago, is used to benchmark various gate-based quantum algorithms on some of the most powerful supercomputers that exist today...
Low-cost quantum circuits for classically intractable instances of the Hamiltonian dynamics simulation problem
Y. Nam, D. Maslov·May 12, 2018
We develop circuit implementations for digital-level quantum Hamiltonian dynamics simulation algorithms suitable for implementation on a reconfigurable quantum computer, such as trapped ions. Our focus is on the codesign of a problem, its solution, a...
Quantum algorithms for electronic structure calculations: Particle-hole Hamiltonian and optimized wave-function expansions
P. Barkoutsos, J. Gonthier, I. Sokolov +9 more·May 11, 2018
In this work we investigate methods to improve the efficiency and scalability of quantum algorithms for quantum chemistry applications. We propose a transformation of the electronic structure Hamiltonian in the second quantization framework into the ...
Extended Lagrange's four-square theorem
Jesús Lacalle, Laura N. Gatti·May 11, 2018
Lagrange's four-square theorem states that every natural number $n$ can be represented as the sum of four integer squares: $n=x_1^2+x_2^2+x_3^2+x_4^2$. Ramanujan generalized Lagrange's result by providing, up to equivalence, all $54$ quadratic forms ...
Quantum network routing and local complementation
F. Hahn, A. Pappa, J. Eisert·May 11, 2018
Quantum communication between distant parties is based on suitable instances of shared entanglement. For efficiency reasons, in an anticipated quantum network beyond point-to-point communication, it is preferable that many parties can communicate sim...
Superconducting cavity electro-optics: A platform for coherent photon conversion between superconducting and photonic circuits
Linran Fan, Chang-ling Zou, Risheng Cheng +5 more·May 11, 2018
Electro-optical chips promise a quantum link between electronic and optical circuits. Leveraging the quantum information-processing ability of superconducting circuits and long-distance distribution ability of optical photons promises the realization...
High-dimensional optical quantum logic in large operational spaces
Poolad Imany, J. Jaramillo-Villegas, Mohammed S. Alshaykh +6 more·May 11, 2018
The probabilistic nature of single-photon sources and photon–photon interactions encourages encoding as much quantum information as possible in every photon for the purpose of photonic quantum information processing. Here, by encoding high-dimensiona...
Error mitigation extends the computational reach of a noisy quantum processor
A. Kandala, K. Temme, A. Córcoles +3 more·May 11, 2018
Quantum computation, a paradigm of computing that is completely different from classical methods, benefits from theoretically proved speed-ups for certain problems and can be used to study the properties of quantum systems1. Yet, because of the inher...
Tunable charge qubit based on barrier-controlled triple quantum dots
Xu-Chen Yang, G. Chan, Xin Wang·May 11, 2018
We present a theoretical proposal of a tunable charge qubit, hosted in triple quantum dots. The manipulation is solely performed by changing the heights of the two potential barriers between the three dots, while the energy of all three dots are fixe...
Using and reusing coherence to realize quantum processes
M. D'iaz, K. Fang, Xin Wang +4 more·May 10, 2018
Coherent superposition is a key feature of quantum mechanics that underlies the advantage of quantum technologies over their classical counterparts. Recently, coherence has been recast as a resource theory in an attempt to identify and quantify it in...
Electric-Field Inputs for Molecular Quantum-Dot Cellular Automata Circuits
E. Blair·May 10, 2018
Quantum-dot cellular automata (QCA) is a low-power, non-von-Neumann, general-purpose paradigm for classical computing using transistor-free logic. An elementary QCA device called a “cell” is made from a system of coupled quantum dots with a few mobil...
Performance Assessment of Resonantly Driven Silicon Two-Qubit Quantum Gate
Tong Wu, Jing Guo·May 10, 2018
Two-qubit quantum gates play an essential role in quantum computing, whose operation critically depends on the entanglement between two qubits. Resonantly driven controlled-NOT (CNOT) gates based on silicon double quantum dots (DQDs) are studied theo...
Encoding Electronic Spectra in Quantum Circuits with Linear T Complexity
R. Babbush, C. Gidney, D. Berry +5 more·May 9, 2018
We construct quantum circuits which exactly encode the spectra of correlated electron models up to errors from rotation synthesis. By invoking these circuits as oracles within the recently introduced "qubitization" framework, one can use quantum phas...
Quantum control for high-fidelity multi-qubit gates
R. Spiteri, M. Schmidt, J. Ghosh +2 more·May 9, 2018
Quantum control for error correction is critical for the practical use of quantum computers. We address quantum optimal control for single-shot multi-qubit gates by framing it as a feasibility problem for the Hamiltonian model that is then solved wit...
Quassical Computing
H. Edward, Cristian S. Calude·May 8, 2018
We present a class of hybrid classical systems using quantum co-processors and point out that unlike purely quantum computers, such hybrids can be both universal and Turing complete; we introduce such quantum-classical hybrids as "quassical." We disc...
Quantum Algorithms for Scientific Computing and Approximate Optimization
Stuart Hadfield·May 8, 2018
Quantum computation appears to offer significant advantages over classical computation and this has generated a tremendous interest in the field. In this thesis we consider the application of quantum computers to scientific computing and combinatoria...