Papers

D. Zhu, Gregory D. Kahanamoku-Meyer, L. Lewis +15 more·Dec 9, 2021

Achieving quantum computational advantage requires solving a classically intractable problem on a quantum device. Natural proposals rely upon the intrinsic hardness of classically simulating quantum mechanics; however, verifying the output is itself ...

Yuta Tsuchimoto, M. Kroner·Dec 9, 2021

Quantum transducers between microwave and optical photons are essential for long-distance quantum networks based on superconducting qubits. An optically active self-assembled quantum dot molecule (QDM) is an attractive platform for the implementati...

Keiichiro Furuya, Nima Lashkari, Mudassir Moosa·Dec 9, 2021

In renormalization group (RG) flow, the low energy states form a code subspace that is approximately protected against the local short-distance errors. We motivate this connection with an example of spin-blocking RG in classical spin models. We consi...

Imran Bashir, D. Leipold, E. Blokhina +9 more·Dec 8, 2021

The proliferation of quantum computing technologies has fueled the race to build a practical quantum computer. The spectrum of the innovation is wide and encompasses many aspects of this technology, such as the qubit, control and detection mechanism,...

B. Fauseweh, Jian-Xin Zhu·Dec 8, 2021

Quantum systems can be dynamically controlled using time-periodic external fields, leading to the concept of Floquet engineering, with promising technological applications. Computing Floquet energy spectra is harder than only computing ground state p...

Rosie Cane, Daryus Chandra, S. Ng +1 more·Dec 8, 2021

Experiments conducted on open-access cloud-based IBM Quantum devices are presented for characterizing their fault tolerance using [4,2,2]-encoded gate sequences. Up to 100 logical gates are activated in the Ibmq_Bogota and Ibmq_Santiago devices and w...

Florian Meier, Lídia del Rio·Dec 8, 2021

,

Benchen Huang, M. Govoni, G. Galli·Dec 8, 2021

We present calculations of both the ground and excited state energies of spin defects in solids carried out on a quantum computer, using a hybrid classical/quantum protocol. We focus on the negatively charged nitrogen vacancy center in diamond and on...

S. Maiti, Kornikar Sen, U. Sen·Dec 8, 2021

We investigate the response to noise, in the form of glassy disorder present in circuit elements, in the success probability of the quantum phase estimation algorithm, a subroutine used to determine the eigenvalue - a phase - corresponding to an eige...

James Sud, Jeffrey Marshall, Zhihui Wang +2 more·Dec 8, 2021

In order to understand the capabilities and limitations of quantum computers, it is necessary to develop methods that efficiently characterize and benchmark error channels present on these devices. In this paper, we present a method that faithfully r...

D. Bluvstein, H. Levine, G. Semeghini +9 more·Dec 7, 2021

The ability to engineer parallel, programmable operations between desired qubits within a quantum processor is key for building scalable quantum information systems1,2. In most state-of-the-art approaches, qubits interact locally, constrained by the ...

S. Krinner, N. Lacroix, A. Remm +13 more·Dec 7, 2021

Quantum computers hold the promise of solving computational problems that are intractable using conventional methods1. For fault-tolerant operation, quantum computers must correct errors occurring owing to unavoidable decoherence and limited control ...

Fengmin Song, Guang-Ming Zhang·Dec 7, 2021

A general framework is proposed to solve the two-dimensional fully frustrated XY model for the Josephson junction arrays in a perpendicular magnetic field. The essential idea is to encode the ground-state local rules induced by frustrations in the loc...

Hajime Tanaka, Mohamed Sabri, R. Portugal·Dec 7, 2021

The spatial search problem aims to find a marked vertex of a finite graph using a dynamic with two constraints: (1) the walker has no compass and (2) the walker can check whether a vertex is marked only after reaching it. This problem is a generaliza...

Alexander M. Czajka, Zhong-Bo Kang, Henry Ma +1 more·Dec 7, 2021

The Nambu–Jona-Lasinio (NJL) model has been widely studied for investigating the chiral phase structure of strongly interacting matter. The study of the thermodynamics of field theories within the framework of Lattice Field Theory is limited by the s...

Arvid Rolander, A. Kinos, A. Walther·Dec 7, 2021

We use density matrix simulations to study the performance of three distance three quantum error correcting codes in the context of the rare-earth-ion-doped crystal (RE) platform for quantum computing. We analyze pseudothresholds for these codes when...

K. Domino, M. Koniorczyk, K. Krawiec +3 more·Dec 7, 2021

We are in the noisy intermediate-scale quantum (NISQ) devices’ era, in which quantum hardware has become available for application in real-world problems. However, demonstrations of the usefulness of such NISQ devices are still rare. In this work, we...

A. Sarkar, Z. Al-Ars, H. Gandhi +1 more·Dec 7, 2021

In this research, we extend the universal reinforcement learning (URL) agent models of artificial general intelligence to quantum environments. The utility function of a classical exploratory stochastic Knowledge Seeking Agent, KL-KSA, is generalized...

Bruna G. M. Ara'ujo, M. M. Taddei, D. Cavalcanti +1 more·Dec 7, 2021

Reconstructing the full quantum state of a many-body system requires the estimation of a number of parameters that grows exponentially with system size. Nevertheless, there are situations in which one is only interested in a subset of these parameter...

Qian Yu, A. Alonso, Jackie Caminiti +7 more·Dec 7, 2021

We investigate the feasibility of using electrons in a linear Paul trap as qubits in a future quantum computer. We discuss the necessary experimental steps to realize such a device through a concrete design proposal, including trapping, cooling, elec...