Papers

L. Govia, C. Poole, M. Saffman +1 more·Jul 28, 2021

Variational quantum algorithms such as the quantum approximate optimization algorithm (QAOA) are particularly attractive candidates for implementation on near-term quantum processors. As hardware realities such as error and qubit connectivity will co...

Paula Garc'ia-Molina, Ana Martin, Mikel Garcia de Andoin +1 more·Jul 27, 2021

Noisy Intermediate-Scale Quantum (NISQ) devices lack error correction, limiting scalability for quantum algorithms. In this context, digital-analog quantum computing (DAQC) offers a more resilient alternative quantum computing paradigm that outperfor...

Huai-Chun Chang, H. Hsu·Jul 25, 2021

Programmable quantum processors are suitable platforms for simulating quantum systems, of which topological phases are of particular interest. We simulate the quench dynamics of a one-dimensional system on IBM Q devices. The topological properties of...

Trevor Vincent, L. O'Riordan, Mikhail Andrenkov +4 more·Jul 20, 2021

We introduce a new open-source software library Jet, which uses task-based parallelism to obtain speed-ups in classical tensor-network simulations of quantum circuits. These speed-ups result from i) the increased parallelism introduced by mapping the...

N. Okuma, Yuya O. Nakagawa·Jul 18, 2021

The eigenspectrum of a non-normal matrix, which does not commute with its Hermitian conjugate, is a central issue of non-Hermitian physics that has been extensively studied in the past few years. There is, however, another characteristic of a non-nor...

W. Cui, Shilu Yan·Jul 17, 2021

To assess whether a gate-based quantum algorithm can be executed successfully on a noisy intermediate-scale quantum (NISQ) device, both complexity and actual value of quantum resources should be considered carefully. Based on quantum phase estimation...

Jiayu Shen, Di Luo, Chenxi Huang +4 more·Jul 16, 2021

A topological $\theta$-term in gauge theories, including quantum chromodynamics in 3+1 dimensions, gives rise to a sign problem that makes classical Monte Carlo simulations impractical. Quantum simulations are not subject to such sign problems and ar...

David Layden·Jul 16, 2021

Simulating quantum dynamics beyond the reach of classical computers is one of the main envisioned applications of quantum computers. The most promising quantum algorithms to this end in the near term are the simplest, which use the Trotter formula an...

Bingzhi Zhang, Quntao Zhuang·Jul 16, 2021

Variational quantum circuits (VQCs) have shown great potential in near-term applications. However, the discriminative power of a VQC, in connection to its circuit architecture and depth, is not understood. To unleash the genuine discriminative power ...

Rahul Trivedi, D. Malz, J. Cirac·Jul 15, 2021

Non-Markovian effects are important in modeling the behavior of open quantum systems arising in solid-state physics, quantum optics as well as in study of biological and chemical systems. The non-Markovian environment is often approximated by discret...

C. Ying, Qi Guo, Shaowei Li +22 more·Jul 15, 2021

Periodically driven systems, or Floquet systems, exhibit many novel dynamics and interesting outof-equilibrium phases of matter. Those phases arising with the quantum systems’ symmetries, such as global U(1) symmetry, can even show dynamical stabilit...

Donggyu Kim, Pureum Noh, Hyun-yong Lee +1 more·Jul 15, 2021

Entanglement in quantum many-body systems is the key concept for future technology and science, opening up a possibility to explore uncharted realms in an enormously large Hilbert space. The hybrid quantum-classical algorithms have been suggested to ...

L. Funcke, T. Hartung, K. Jansen +3 more·Jul 15, 2021

In Variational Quantum Simulations, the construction of a suitable parametric quantum circuit is subject to two counteracting effects. The number of parameters should be small for the device noise to be manageable, but also large enough for the circu...

Nikodem Grzesiak, A. Maksymov, Pradeep Niroula +1 more·Jul 15, 2021

Parallel operations in conventional computing have proven to be an essential tool for efficient and practical computation, and the story is not different for quantum computing. Indeed, there exists a large body of works that study advantages of paral...

C. Ryan-Anderson, J. Bohnet, K. Lee +14 more·Jul 15, 2021

Correcting errors in real time is essential for reliable large-scale quantum computations. Realizing this high-level function requires a system capable of several low-level primitives, including single-qubit and two-qubit operations, mid-circuit meas...

K. Yip·Jul 15, 2021

In this dissertation, we explore how quantum annealing (QA) and its applications behave in an open system setting. We give derivations and numerical recipes for effective parallel simulation methods for time-dependent open dynamics of quantum anneali...

I. A. Simakov, I. S. Besedin, A. V. Ustinov·Jul 14, 2021

Experimental realization of stabilizer-based quantum error correction (QEC) codes that would yield superior logical qubit performance is one of the formidable task for state-of-the-art quantum processors. A major obstacle towards realizing this goal ...

Chang-Rui Yi·Jul 13, 2021

The simulation of adiabatic evolution has deep connections with Adiabatic Quantum Computation, the Quantum Approximate Optimization Algorithm and adiabatic state preparation. Here we address the error analysis problem in quantum simulation of adiabat...

Kadir Gümüş, L. Schmalen·Jul 13, 2021

Error correction plays a major role in the reconciliation of continuous variable quantum key distribution (CV-QKD) and greatly affects the performance of the system. CV- QKD requires error correction codes of extremely low rates and high reconciliati...

Hector Jose Morrell, H. Wong·Jul 13, 2021

In this paper, the application of quantum computing (QC) in solving gate insulator Poisson equation is studied, through QC simulator and hardware in IBM. Various gate insulator stacks with and without fixed charges are studied. It is found that by in...