Papers

S. Stein, Yufei Ding, N. Wiebe +5 more·Nov 29, 2021

Variational quantum algorithm (VQA), which is comprised of a classical optimizer and a parameterized quantum circuit, emerges as one of the most promising approaches for harvesting the power of quantum computers in the noisy intermediate scale quantu...

A. Rastegin, A. M. Shemet·Nov 29, 2021

We examine how amplitude noise in queries to the oracle degrades a performance of quantum search algorithm. The Grover search and similar techniques are widely used in various quantum algorithms, including cases where rival parties are fighting over ...

N. V. Horne, M. Mukherjee·Nov 29, 2021

Interfacing ion qubits in separate traps is among the challenges towards scaling up ion quantum computing. This theoretical study focuses on using a conducting wire to couple the motional quantum states of ions in separate planar traps. This approach...

Clóvis Corrêa, A. Vidiella-Barranco·Nov 29, 2021

In this work, we consider a setup consisting of an atomic ensemble enclosed within a laser-driven optomechanical cavity, having the moving mirror further (capacitively) coupled to a low-frequency LC circuit. This constitutes a four-partite optoelectr...

Daowen Qiu·Nov 28, 2021

{\it Learning finite automata} (termed as {\it model learning}) has become an important field in machine learning and has been useful realistic applications. Quantum finite automata (QFA) are simple models of quantum computers with finite memory. Due...

Xingjian Zhang, Pei Zeng, Tianyu Ye +2 more·Nov 27, 2021

Complementarity is an essential feature of quantum mechanics. The preparation of an eigenstate of one observable implies complete randomness in its complementary observable. In quantum cryptography, complementarity allows us to formulate security ana...

E. Davis·Nov 27, 2021

Properties of Shor's algorithm and the related period-finding algorithm could serve as benchmarks for the operation of a quantum computer. Distinctive universal behaviour is expected for the probability for success of the period-finding algorithm as ...

D. Concha, L. Pereira, L. Zambrano +1 more·Nov 26, 2021

Here, we study the problem of decoding information transmitted through unknown quantum states. We assume that Alice encodes an alphabet into a set of orthogonal quantum states, which are then transmitted to Bob. However, the quantum channel that medi...

Xavier Bonet-Monroig, Hao Wang, D. Vermetten +5 more·Nov 26, 2021

Variational quantum algorithms (VQAs) offer a promising path toward using near-term quantum hardware for applications in academic and industrial research. These algorithms aim to find approximate solutions to quantum problems by optimizing a parametr...

Anbang Wu, Gushu Li, Yuke Wang +3 more·Nov 26, 2021

Variational quantum algorithms are expected to demonstrate the advantage of quantum computing on near-term noisy quantum computers. However, training such variational quantum algorithms suffers from gradient vanishing as the size of the algorithm inc...

Rajni Bala, V. Ravishankar·Nov 26, 2021

Environmental effects on the transmission of a state result, in general, in a change in the information carried by it. To mitigate this, many techniques such as quantum error–correcting codes, decoherence–free–subspaces [Rev Mod Phys, 88(4):041001, 2...

D. Castaldo, S. Jahangiri, A. Delgado +1 more·Nov 26, 2021

Quantum chemical calculations on quantum computers have been focused mostly on simulating molecules in the gas phase. Molecules in liquid solution are, however, most relevant for chemistry. Continuum solvation models represent a good compromise betwe...

F. Bao, Haowei Deng, D. Ding +25 more·Nov 26, 2021

Superconducting qubits provide a promising path toward building large-scale quantum computers. The simple and robust transmon qubit has been the leading platform, achieving multiple milestones. However, fault-tolerant quantum computing calls for qubi...

Anbang Wu, Gushu Li, Hezi Zhang +3 more·Nov 26, 2021

In this paper, we formally describe the three challenges of mapping surface code on superconducting devices, and present a comprehensive synthesis framework to overcome these challenges. The proposed framework consists of three optimizations. First, ...

Shuo Liu, Shi-Xin Zhang, Chang-Yu Hsieh +2 more·Nov 26, 2021

Non-equilibrium physics including many-body localization (MBL) has attracted increasing attentions, but theoretical approaches of reliably studying non-equilibrium properties remain quite limited. In this Letter, we propose a systematic approach to p...

Anbang Wu, Gushu Li, Hezi Zhang +3 more·Nov 26, 2021

Quantum Error Correction (QEC) is essential for fault-tolerant quantum copmutation, and its implementation is a very sophisticated process involving both quantum and classical hardware. Formulating and verifying the decomposition of logical operation...

Edgar Andres Ruiz Guzman, D. Lacroix·Nov 25, 2021

We explore the possibility to perform symmetry restoration with the variation after projection technique on a quantum computer followed by additional post-processing. The final goal is to develop configuration interaction techniques based on many-bod...

Xiao-Wei Huang, Jingquan Luo, Lvzhou Li·Nov 25, 2021

Matroid theory has been developed to be a mature branch of mathematics and has extensive applications in combinatorial optimization, algorithm design and so on. On the other hand, quantum computing has attracted much attention and has been shown to s...

M. Skrzypczyk, S. Wehner·Nov 25, 2021

Quantum communication can enhance internet technology by enabling novel applications that are provably impossible classically. The successful execution of such applications relies on the generation of quantum entanglement between different users of t...

Anbang Wu, Gushu Li, Yufei Ding +1 more·Nov 25, 2021

Variational quantum algorithms are expected to demonstrate the advantage of quantum computing on near-term noisy quantum computers. However, training such variational quantum algorithms suffers from gradient vanishing as the size of the algorithm inc...