Papers

Qi-Kai He, Duan-Lu Zhou·May 28, 2018

Abstract Coherent manipulation of a quantum system is one of the main themes in current physics researches. In this work, we design a circuit QED system with a tunable coupling between an artificial atom and a superconducting resonator while keeping ...

A. McCaskey, E. Dumitrescu, D. Liakh +1 more·May 23, 2018

Recent computations involving quantum processing units (QPUs)have demonstrated a series of challenges inherent to hybrid classical-quantum programming, compilation, execution, and verification and validation. Despite considerable progress, system-lev...

E. Campbell·May 23, 2018

Single-shot error correction is a technique for correcting physical errors using only a single round of noisy check measurements, such that any residual noise affects a small number of qubits. We propose a general theory of single-shot error correcti...

Stefanie J. Beale, Joel J. Wallman, Mauricio Gutiérrez +2 more·May 22, 2018

Typical studies of quantum error correction assume probabilistic Pauli noise, largely because it is relatively easy to analyze and simulate. Consequently, the effective logical noise due to physically realistic coherent errors is relatively unknown. ...

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...

E. Huang, A. Doherty, S. Flammia·May 21, 2018

We compare the performance of quantum error correcting codes when memory errors are unitary with the more familiar case of dephasing noise. For a wide range of codes we analytically compute the effective logical channel that results when the error co...

Sahil Imtiyaz·May 16, 2018

Big Data is characterized by Volume, Velocity, Veracity and Complexity. The interaction between this huge data is complex with an associated free will having dynamic and non linear nature. We reduced big data based on its characteristics, conceptuall...

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...

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...

Felix Kleißler, A. Lazariev, Silvia Arroyo-Camejo·Apr 29, 2018

Geometric phases and holonomies are a promising resource for the realization of high-fidelity quantum operations in noisy devices, due to their intrinsic fault-tolerance against parametric noise. However, for a long time their practical use in quantu...

Yink Loong Len, H. Ng·Apr 25, 2018

We study the performance of quantum error correction (QEC) on a system undergoing open-system (OS) dynamics. The noise on the system originates from a joint quantum channel on the system-bath composite, a framework that includes and interpolates betw...

Arne Hollmann, D. Jirovec, M. Kucharski +3 more·Apr 25, 2018

Solid-state qubit manipulation and read-out fidelities are reaching fault-tolerance, but quantum error correction requires millions of physical qubits and therefore a scalable quantum computer architecture. To solve signal-line bandwidth and fan-out ...

Yuan Xu, W. Cai, Y. Ma +8 more·Apr 20, 2018

Geometric phases are noise resilient, and thus provide a robust way towards high-fidelity quantum manipulation. Here we experimentally demonstrate arbitrary nonadiabatic holonomic single-qubit quantum gates for both a superconducting transmon qubit a...

M. Otten, S. Gray·Apr 19, 2018

We discuss a surprisingly simple scheme for accounting (and removal) of error in observables determined from quantum algorithms. A correction to the value of the observable is calculated by first measuring the observable with all error sources active...

A. Gheorghiu, M. Hoban, E. Kashefi·Apr 17, 2018

With experimental quantum computing technologies now in their infancy, the search for efficient means of testing the correctness of these quantum computations is becoming more pressing. An approach to the verification of quantum computation within th...

Patrick Rall·Apr 15, 2018

Verification of NISQ era quantum devices demands fast classical simulation of large noisy quantum circuits. We present an algorithm based on the stabilizer formalism that can efficiently simulate noisy stabilizer circuits. Additionally, the protocol ...

D. Egger, M. Ganzhorn, G. Salis +6 more·Apr 13, 2018

We investigate a non-adiabatic holonomic operation that enables us to entangle two fixed-frequency superconducting transmon qubits attached to a common bus resonator. Two coherent microwave tones are applied simultaneously to the two qubits and drive...

Kosuke Fukui, A. Tomita, A. Okamoto·Apr 11, 2018

To implement fault-tolerant quantum computation with continuous variables, the Gottesman--Kitaev--Preskill (GKP) qubit has been recognized as an important technological element. We have proposed a method to reduce the required squeezing level to real...

Edward Grant, Marcello Benedetti, Shuxiang Cao +5 more·Apr 10, 2018

Quantum circuits with hierarchical structure have been used to perform binary classification of classical data encoded in a quantum state. We demonstrate that more expressive circuits in the same family achieve better accuracy and can be used to clas...

Parveen Kumar, S. Kundu, M. Chand +2 more·Apr 10, 2018

Quantum measurements are described as instantaneous projections in textbooks. They can be stretched out in time using weak measurements, whereby one can observe the evolution of a quantum state as it heads towards one of the eigenstates of the measur...