Papers

L. Lao, A. Korotkov, Zhang Jiang +3 more·Nov 8, 2021

Two-qubit gates are important components of quantum computing. However, unwanted interactions between qubits (so-called parasitic gates) can be particularly problematic and degrade the performance of quantum applications. In this work, we present two...

Anna Sergeevna Nikolaeva, E. Kiktenko, A. Fedorov·Nov 8, 2021

The development of a universal fault-tolerant quantum computer that can solve efficiently various difficult computational problems is an outstanding challenge for science and technology. In this work, we propose a technique for an efficient implement...

B. Gulbahar·Nov 8, 2021

Quantum state tomography (QST) for reconstructing pure states requires exponentially increasing resources and measurements with the number of qubits by using state-of-the-art quantum compressive sensing (CS) methods. In this article, QST reconstructi...

David Schwerdt, Yotam Shapira, T. Manovitz +1 more·Nov 7, 2021

In some quantum computing (QC) architectures, entanglement of an arbitrary number of qubits can be generated in a single operation. This property has many potential applications, and may specifically be useful for quantum error correction (QEC). Stab...

T. Manovitz, Yotam Shapira, L. Gazit +2 more·Nov 7, 2021

Quantum computers are expected to achieve a significant speed-up over classical computers in solving a range of computational problems. Chains of ions held in a linear Paul trap are a promising platform for constructing such quantum computers, due to...

Kirill S. Dubovitskii, Yuriy Makhlin·Nov 7, 2021

In randomized benchmarking of quantum logical gates, partial twirling can be used for simpler implementation, better scaling, and higher accuracy and reliability. For instance, for two-qubit gates, single-qubit twirling is easier to realize than full...

Federico Gallina, Matteo Bruschi, B. Fresch·Nov 4, 2021

Simulating charge and energy transfer in extended molecular networks requires an effective model to include the environment because it significantly affects the quantum dynamics. A prototypical effect known as environment-assisted quantum transport (...

Chin-te Liao, S. Bahrani, Francisco Ferreira da Silva +1 more·Nov 3, 2021

Quantum network protocols offer new functionalities such as enhanced security to communication and computational systems. Despite the rapid progress in quantum hardware, it has not yet reached a level of maturity that enables execution of many quantu...

Max McGinley, Sthitadhi Roy, S. Parameswaran·Nov 3, 2021

We introduce a model of nonunitary quantum dynamics that exhibits infinitely long-lived discrete spatiotemporal order robust against any unitary or dissipative perturbation. Ergodicity is evaded by combining a sequence of projective measurements with...

Weiyuan Gong, Sicheng Jiang, D. Deng·Nov 3, 2021

We propose a general and systematic strategy to compile arbitrary quantum channels without using ancillary qubits, based on proximal policy optimization -- a powerful deep reinforcement learning algorithm. We rigorously prove that, in sharp contrast ...

Duc-Manh Tran, Duy V. Nguyen, Bingjie Le +1 more·Nov 2, 2021

We execute the quantum eraser, the Elitzur–Vaidman bomb, and the Hardy’s paradox experiment using high-level programming language on a generic, gate-based superconducting quantum processor made publicly available by IBM. The quantum circuits for thes...

M. Khazali, W. Lechner·Nov 2, 2021

This article proposes quantum processing in an optical lattice, using Rydberg electron’s Fermi scattering from ground-state atoms in spin-dependent lattices as a source of interaction. Instead of relying on Rydberg pair potentials, the interaction is...

Harsha Nagarajan, Owen Lockwood, Carleton Coffrin·Nov 1, 2021

In recent years, the quantum computing community has seen an explosion of novel methods to implement non-trivial quantum computations on near-term hardware. An important direction of research has been to decompose an arbitrary entangled state, repres...

E. Jones, Logan E. Hillberry, Matthew T. Jones +9 more·Oct 30, 2021

Quantum cellular automata (QCA) evolve qubits in a quantum circuit depending only on the states of their neighborhoods and model how rich physical complexity can emerge from a simple set of underlying dynamical rules. The inability of classical compu...

A. Geng, A. Moghiseh, C. Redenbach +1 more·Oct 29, 2021

In image processing, the amount of data to be processed grows rapidly, in particular when dealing with images of more than two dimensions or time series of images. Thus, efficient processing is a challenge, as data sizes may push even supercomputers ...

Bryan T. Gard, A. M. Meier·Oct 29, 2021

In order to quantify the relative performance of different testbed quantum computing devices, it is useful to benchmark them using a common protocol. While some benchmarks rely on the performance of random circuits and are generic in nature, here we ...

K. He, Shusen Liu, J. Hou·Oct 28, 2021

The number of qubits in current quantum computers is a major restriction on their wider application. To address this issue, Ying conceived of using two or more small-capacity quantum computers to produce a larger-capacity quantum computing system by ...

Woojun Lee, Zhangjie Qin, R. Raussendorf +2 more·Oct 27, 2021

Quantum simulation using time evolution in phase estimation-based quantum algorithms can yield unbiased solutions of classically intractable models. However, long runtimes open such algorithms to decoherence. We show how measurement-based quantum sim...

Prithvi Gundlapalli, Junyi Lee·Oct 26, 2021

Quantum computing promises to provide exponential speed-ups to certain classes of problems. In many such algorithms, a classical vector $\mathbf{b}$ is encoded in the amplitudes of a quantum state $\left |b \right>$. However, efficiently preparing $\...

G. Low·Oct 26, 2021

We improve the number of $T$ gates needed for a $b$-bit approximation of a multiplexed quantum gate with $c$ controls applying $n$ single-qubit arbitrary phase rotations from $4n b+\mathcal{O}(\sqrt{cn b})$ to $2n b+\mathcal{O}(\sqrt{cn b})$, and red...