Papers

Ting Zhang, Jinzhao Sun, Xiao-Xu Fang +3 more·Jun 18, 2021

A crucial subroutine for various quantum computing and communication algorithms is to efficiently extract different classical properties of quantum states. In a notable recent theoretical work by Huang, Kueng, and Preskill [Nat. Phys. 16, 1050 (2020)...

Imin Chen, David Sun·Jun 18, 2021

Abstract The hidden subgroup problem (HSP) is a cornerstone problem in quantum computing, which captures many problems of interest and provides a standard framework algorithm for their study based on Fourier sampling, one class of techniques known to...

D. Amaro, C. Modica, Matthias Rosenkranz +3 more·Jun 18, 2021

Current gate-based quantum computers have the potential to provide a computational advantage if algorithms use quantum hardware efficiently. To make combinatorial optimization more efficient, we introduce the filtering variational quantum eigensolver...

Ryan H. Vogt, A. Petersson·Jun 18, 2021

We introduce a binary, relaxed gradient, trust-region method for optimizing pulse sequences for single flux quanta (SFQ) control of a quantum computer. The pulse sequences are optimized with the goal of realizing unitary gate transformations. Each pul...

A. Gyenis, A. Di Paolo, J. Koch +3 more·Jun 18, 2021

Artificial atoms realized by superconducting circuits offer unique opportunities to store and process quantum information with high fidelity. Among them, implementations of circuits that harness intrinsic noise protection have been rapidly developed ...

K. Khadiev, Dmitry Kravchenko·Jun 17, 2021

We consider the recognition problem of the Dyck Language generalized for multiple types of brackets. We provide an algorithm with quantum query complexity $O(\sqrt{n}(\log n)^{0.5k})$, where $n$ is the length of input and $k$ is the maximal nesting d...

M. Kieferová, Carlos Ortiz Marrero, N. Wiebe·Jun 17, 2021

Quantum neural networks (QNNs) are a framework for creating quantum algorithms that promises to combine the speedups of quantum computation with the widespread successes of machine learning. A major challenge in QNN development is a concentration of ...

Fabijan Pavošević, Johannes Flick·Jun 17, 2021

In the field of polaritonic chemistry, strong light-matter interactions are used to alter chemical reactions inside optical cavities. To understand these processes, the development of reliable theoretical models is essential. While traditional method...

Yuki Sato, R. Kondo, Satoshi Koide +2 more·Jun 17, 2021

Computer-aided engineering techniques are indispensable in modern engineering developments. In particular, partial differential equations are commonly used to simulate the dynamics of physical phenomena, but very large systems are often intractable w...

Guillermo Alonso-Linaje, Parfait Atchade-Adelomou·Jun 16, 2021

VQE is currently one of the most widely used algorithms for optimizing problems using quantum computers. A necessary step in this algorithm is calculating the expectation value given a state, which is calculated by decomposing the Hamiltonian into Pa...

D. Bernstein, B. Brumley, Ming-Shing Chen +1 more·Jun 16, 2021

Google's CECPQ1 experiment in 2016 integrated a post-quantum key-exchange algorithm, newhope1024, into TLS 1.2. The Google-Cloudflare CECPQ2 experiment in 2019 integrated a more efficient key-exchange algorithm, ntruhrss701, into TLS 1.3. This paper ...

D. Saida, Y. Yamanashi, M. Hidaka +4 more·Jun 16, 2021

Experimental demonstrations of quantum annealing with “native” implementation of Boolean logic Hamiltonians are reported. As a superconducting integrated circuit, a problem Hamiltonian whose set of ground states is consistent with a given truth table...

Yaxing Zhang, Jacob C. Curtis, Christopher S. Wang +2 more·Jun 16, 2021

High-Q microwave cavity modes coupled to transmon ancillas provide a hardware-efficient platform for quantum computing. Due to their coupling, the cavity modes inherit finite nonlinearity from the transmons. In this paper, we theoretically and experi...

A. Saha, Debasri Saha, Amlan Chakrabarti·Jun 16, 2021

Quantum algorithms can be realized in the form of a quantum circuit. To map quantum circuit for specific quantum algorithm to quantum hardware, qubit mapping is an imperative technique based on the qubit topology. Due to the neighbourhood constraint o...

J. Debrota, P. Love·Jun 16, 2021

We describe a general approach to modeling rational decision-making agents who adopt either quantum or classical mechanics based on the Quantum Bayesian (QBist) approach to quantum theory. With the additional ingredient of a scheme by which the prope...

S. Filatov, M. Auzinsh·Jun 16, 2021

We show a method of describing processes with indefinite causal order (ICO) by a definite causal order. We do so by relabeling the processes that take place in the circuit in accordance with the basis of measurement of control qubit. Causal nonsepara...

Yu Jin, M. Govoni, G. Wolfowicz +4 more·Jun 16, 2021

Optically and magnetically active point defects in semiconductors are interesting platforms for the development of solid-state quantum technologies. Their optical properties are usually probed by measuring photoluminescence spectra, which provide inf...

Rui Han, Weijun Li, Shrobona Bagchi +2 more·Jun 16, 2021

Random samples of quantum states are an important resource for various tasks in quantum information science, and samples in accordance with a problem-specific distribution can be indispensable ingredients. Some algorithms generate random samples by a...

H. Yamasaki, Sho Sonoda·Jun 16, 2021

Classification is a common task in machine learning. Random features (RFs) stand as a central technique for scalable learning algorithms based on kernel methods, and more recently proposed optimized random features , sampled depending on the model and...

Eric Sabo, Arun B. Aloshious, K. Brown·Jun 15, 2021

Trellis decoders are a general decoding technique first applied to qubit-based quantum error correction codes by Ollivier and Tillich in 2006. Here, we improve the scalability and practicality of their theory, show that it has strong structure, exten...