Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Perfect quantum state transfer in a superconducting qubit chain with parametrically tunable couplings.
Xuegang Li, Yuwei Ma, Jiaxiu Han +8 more·Jun 11, 2018
Faithfully transferring the quantum state is essential for quantum information processing. Here we demonstrate a fast (in 84 ns) and high-fidelity (99.2%) transfer of arbitrary quantum states in a chain of four superconducting qubits with nearest-nei...
A Unification of the Coding Theory and OAQEC Perspectives on Hybrid Codes
Shayan Majidy·Jun 10, 2018
There is an advantage in simultaneously transmitting both classical and quantum information over a quantum channel compared to sending independent transmissions. The successful implementation of simultaneous transmissions of quantum and classical inf...
Hamiltonian Engineering in Quantum Spin Networks.
Ieshan Vaidya·Jun 7, 2018
Quantum simulation presents itself as one of the biggest advantages of developing quantum computers. Simulating a quantum system classically is almost impossible beyond a certain system size whereas a controllable quantum system inherently has the re...
Verified quantum information scrambling
K. Landsman, C. Figgatt, T. Schuster +4 more·Jun 7, 2018
Quantum scrambling is the dispersal of local information into many-body quantum entanglements and correlations distributed throughout an entire system. This concept accompanies the dynamics of thermalization in closed quantum systems, and has recentl...
Fault-Tolerant Logical Gates in the IBM Quantum Experience.
R. Harper, S. Flammia·Jun 6, 2018
Quantum computers will require encoding of quantum information to protect them from noise. Fault-tolerant quantum computing architectures illustrate how this might be done but have not yet shown a conclusive practical advantage. Here we demonstrate t...
Modeling noise and error correction for Majorana-based quantum computing
Christina Knapp, M. Beverland, D. Pikulin +1 more·Jun 4, 2018
Majorana-based quantum computing seeks to use the non-local nature of Majorana zero modes to store and manipulate quantum information in a topologically protected way. While noise is anticipated to be significantly suppressed in such systems, finite ...
Bayesian estimation for quantum sensing in the absence of single-shot detection
H. T. Dinani, D. Berry, Raúl B. Gonzalez +2 more·Jun 4, 2018
Quantum information protocols, such as quantum error correction and quantum phase estimation, have been widely used to enhance the performance of quantum sensors. While these protocols have relied on single-shot detection, in most practical applicati...
Quantifying Memory Capacity as a Quantum Thermodynamic Resource.
Varun Narasimhachar, Jayne Thompson, Jiajun Ma +2 more·May 31, 2018
The information-carrying capacity of a memory is known to be a thermodynamic resource facilitating the conversion of heat to work. Szilard's engine explicates this connection through a toy example involving an energy-degenerate two-state memory. We d...
Efficient quantum algorithm for solving travelling salesman problem: An IBM quantum experience
K. Srinivasan, Saipriya Satyajit, B. K. Behera +1 more·May 28, 2018
The famous Travelling Salesman Problem (TSP) is an important category of optimization problems that is mostly encountered in various areas of science and engineering. Studying optimization problems motivates to develop advanced techniques more suited...
8×8 reconfigurable quantum photonic processor based on silicon nitride waveguides.
C. Taballione, T. Wolterink, J. Lugani +10 more·May 28, 2018
The development of large-scale optical quantum information processing circuits ground on the stability and reconfigurability enabled by integrated photonics. We demonstrate a reconfigurable 8×8 integrated linear optical network based on silicon nitri...
High-fidelity non-adiabatic cutting and stitching of a spin chain via local control
Pavlo V. Pyshkin, E. Sherman, J. You +1 more·May 25, 2018
We propose and analyze, focusing on non-adiabatic effects, a technique of manipulating quantum spin systems based on local ‘cutting’ and ‘stitching’ of the Heisenberg exchange coupling between the spins. This first operation is cutting of a bond sepa...
cQASM v1.0: Towards a Common Quantum Assembly Language
N. Khammassi, G. Guerreschi, I. Ashraf +3 more·May 24, 2018
The quantum assembly language (QASM) is a popular intermediate representation used in many quantum compilation and simulation tools to describe quantum circuits. Currently, multiple different dialects of QASM are used in different quantum computing t...
Quantum error correction and universal gate set operation on a binomial bosonic logical qubit
Ling Hu, Yuwei Ma, W. Cai +10 more·May 23, 2018
Logical qubit encoding and quantum error correction (QEC) protocols have been experimentally demonstrated in various physical systems with multiple physical qubits, generally without reaching the break-even point, at which the lifetime of the quantum...
Quantum probe of an on-chip broadband interferometer for quantum microwave photonics
P. Eder, T. Ramos, J. Goetz +11 more·May 22, 2018
Quantum microwave photonics aims at generating, routing, and manipulating propagating quantum microwave fields in the spirit of optical photonics. To this end, the strong nonlinearities of superconducting quantum circuits can be used to either improv...
Quantum classification of the MNIST dataset via Slow Feature Analysis
Iordanis Kerenidis, Alessandro Luongo·May 22, 2018
Quantum machine learning carries the promise to revolutionize information and communication technologies. While a number of quantum algorithms with potential exponential speedups have been proposed already, it is quite difficult to provide convincing...
Fast and robust control of two interacting spins
Xiao-tong Yu, Qi Zhang, Y. Ban +1 more·May 16, 2018
Rapid preparation, manipulation, and correction of spin states with high fidelity are requisite for quantum information processing and quantum computing. In this paper, we propose a fast and robust approach for controlling two spins with Heisenberg a...
Local equivalence of complete bipartite and repeater graph states
I. Tzitrin·May 15, 2018
Classifying locally equivalent graph states, and stabilizer states more broadly, is a significant problem in the theories of quantum information and multipartite entanglement. A special focus is given to those graph states for which equivalence throu...
Optimization and synchronization of programmable quantum communication channels
Mee Seong Im, Venkateswara Dasari·May 15, 2018
Quantum applications transmit and receive data through quantum and classical communication channels. Channel capacity, the distance and the photon path between transmitting and receiving parties and the speed of the computation links play an essentia...
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 ...
Measurement-based quantum control of mechanical motion
M. Rossi, D. Mason, Junxin Chen +2 more·May 14, 2018
Controlling a quantum system by using observations of its dynamics is complicated by the backaction of the measurement process—that is, the unavoidable quantum disturbance caused by coupling the system to a measurement apparatus. An efficient measure...