Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,921 papers in 12 months (-33% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Hybrid Quantum-Classical Hierarchy for Mitigation of Decoherence and Determination of Excited States
J. McClean, M. Schwartz, J. Carter +1 more·Mar 17, 2016
Author(s): McClean, JR; Kimchi-Schwartz, ME; Carter, J; De Jong, WA | Abstract: © 2017 American Physical Society. Using quantum devices supported by classical computational resources is a promising approach to quantum-enabled computation. One powerfu...
Shortcuts to adiabaticity and applications to Quantum Computation
Alan C. Santos·Mar 16, 2016
Adiabatic evolution is a powerful technique in quantum information and computation. However, its performance is limited by the adiabatic theorem of quantum mechanics. In this scenario, shortcuts to adiabaticity, such as provided by the superadiabatic...
Quantum Linear Systems Theory
I. Petersen·Mar 16, 2016
This paper surveys some recent results on the theory of quantum linear systems and presents them within a unified framework. Quantum linear systems are a class of systems whose dynamics, which are described by the laws of quantum mechanics, take the ...
Reduced quantum dynamics with initial system-environment correlations characterized by pure Markov states
A. Turkmen, A. Verccin, S. Yılmaz·Mar 16, 2016
Any tripartite state which saturates the strong subadditivity relation for the quantum entropy is defined as the Markov state.A tripartite pure state describing an open system, its environment and their purifying system isa pure Markov state iff the ...
Procedure for systematically tuning up cross-talk in the cross-resonance gate
S. Sheldon, E. Magesan, J. Chow +1 more·Mar 15, 2016
We present improvements in both theoretical understanding and experimental implementation of the cross resonance (CR) gate that have led to shorter two-qubit gate times and interleaved randomized benchmarking fidelities exceeding 99%. The CR gate is ...
Demonstration of a small programmable quantum computer with atomic qubits
S. Debnath, N. Linke, C. Figgatt +3 more·Mar 15, 2016
Quantum computers can solve certain problems more efficiently than any possible conventional computer. Small quantum algorithms have been demonstrated on multiple quantum computing platforms, many specifically tailored in hardware to implement a part...
An efficient magic state approach to small angle rotations
E. Campbell, J. O’Gorman·Mar 14, 2016
Standard error-correction techniques only provide a quantum memory and need extra gadgets to perform computation. Central to quantum algorithms are small angle rotations, which can be fault-tolerantly implemented given a supply of an unconventional s...
Fast and high-fidelity entangling gate through parametrically modulated longitudinal coupling
B. Royer, A. Grimsmo, N. Didier +1 more·Mar 14, 2016
We investigate an approach to universal quantum computation based on the modulation of longitudinal qubit-oscillator coupling. We show how to realize a controlled-phase gate by simultaneously modulating the longitudinal coupling of two qubits to a co...
Universal Fault-Tolerant Gates on Concatenated Stabilizer Codes
Theodore J. Yoder, Ryuji Takagi, I. Chuang·Mar 12, 2016
It is an oft-cited fact that no quantum code can support a set of fault-tolerant logical gates that is both universal and transversal. This no-go theorem is generally responsible for the interest in alternative universality constructions including ma...
Parametric down-conversion photon-pair source on a nanophotonic chip
Xiang Guo, Chang-ling Zou, C. Schuck +3 more·Mar 11, 2016
Quantum-photonic chips, which integrate quantum light sources alongside active and passive optical elements, as well as single-photon detectors, show great potential for photonic quantum information processing and quantum technology. Mature semicondu...
Robust concurrent remote entanglement between two superconducting qubits
A. Narla, Shyam Shankar, M. Hatridge +8 more·Mar 11, 2016
Entangling two remote quantum systems which never interact directly is an essential primitive in quantum information science and forms the basis for the modular architecture of quantum computing. When protocols to generate these remote entangled pair...
Simulated-quantum-annealing comparison between all-to-all connectivity schemes
T. Albash, W. Vinci, Daniel A. Lidar·Mar 11, 2016
Quantum annealing aims to exploit quantum mechanics to speed up the search for the solution to optimization problems. Most problems exhibit complete connectivity between the logical spin variables after they are mapped to the Ising spin Hamiltonian o...
Trapped-Ion Quantum Logic with Global Radiation Fields.
S. Weidt, J. Randall, J. Randall +8 more·Mar 10, 2016
Trapped ions are a promising tool for building a large-scale quantum computer. However, the number of required radiation fields for the realization of quantum gates in any proposed ion-based architecture scales with the number of ions within the quan...
Parallel Quantum Circuit in a Tunnel Junction
Omid Faizy Namarvar, G. Dridi, C. Joachim·Mar 10, 2016
Spectral analysis of 1 and 2-states per line quantum bus are normally sufficient to determine the effective Vab(N) electronic coupling between the emitter and receiver states through the bus as a function of the number N of parallel lines. When Vab(N...
General purpose multiplexing device for cryogenic microwave systems
Benjamin J. Chapman, B. Moores, Eric I. Rosenthal +2 more·Mar 8, 2016
We introduce and experimentally characterize a general purpose device for signal processing in circuit quantum electrodynamics systems. The device is a broadband two-port microwave circuit element with three modes of operation: it can transmit, refle...
Thresholds for Universal Concatenated Quantum Codes.
C. Chamberland, Tomas Jochym-O'Connor, R. Laflamme·Mar 8, 2016
Quantum error correction and fault tolerance make it possible to perform quantum computations in the presence of imprecision and imperfections of realistic devices. An important question is to find the noise rate at which errors can be arbitrarily su...
Photonic simulation of entanglement growth and engineering after a spin chain quench
I. Pitsios, L. Banchi, A. S. Rab +8 more·Mar 8, 2016
The time evolution of quantum many-body systems is one of the most important processes for benchmarking quantum simulators. The most curious feature of such dynamics is the growth of quantum entanglement to an amount proportional to the system size (...
Transversal Clifford gates on folded surface codes
J. Moussa·Mar 7, 2016
Surface and color codes are two forms of topological quantum error correction in two spatial dimensions with complementary properties. Surface codes have lower-depth error detection circuits and well-developed decoders to interpret and correct errors...
Dynamical Lamb effect versus dissipation in superconducting quantum circuits
A. Zhukov, D. S. Shapiro, W. Pogosov +3 more·Mar 7, 2016
Superconducting circuits provide a new platform to study nonstationary cavity QED phenomena. An example of such a phenomenon is a dynamical Lamb effect which is a parametric excitation of an atom due to the nonadiabatic modulation of its Lamb shift. ...
Verified Compilation of Space-Efficient Reversible Circuits
M. Amy, M. Rötteler, K. Svore·Mar 4, 2016
The generation of reversible circuits from high-level code is an important problem in several application domains, including low-power electronics and quantum computing. Existing tools compile and optimize reversible circuits for various metrics, suc...