Papers

N. Yoshioka, H. Hakoshima, Y. Matsuzaki +3 more·Jul 6, 2021

One of the major challenges for erroneous quantum computers is undoubtedly the control over the effect of noise. Considering the rapid growth of available quantum resources that are not fully fault tolerant, it is crucial to develop practical hardwar...

Christian D. Marciniak, T. Feldker, Ivan Pogorelov +7 more·Jul 5, 2021

Quantum sensors are an established technology that has created new opportunities for precision sensing across the breadth of science. Using entanglement for quantum enhancement will allow us to construct the next generation of sensors that can approa...

Yifeng Xiong, S. Ng, L. Hanzo·Jul 3, 2021

Quantum error mitigation (QEM) is a class of promising techniques capable of reducing the computational error of variational quantum algorithms tailored for current noisy intermediate-scale quantum computers. The recently proposed permutation-based m...

Roderick D. Cochran, D. Gauthier·Jul 2, 2021

Quantum key distribution (QKD) systems provide a method for two users to exchange a provably secure key. Synchronizing the users’ clocks is an essential step before a secure key can be distilled. Qubit-based synchronization protocols directly use the...

Zenghui Bao, Zhiling Wang, Yukai Wu +5 more·Jul 1, 2021

We realize on-demand storage and retrieval of weak coherent microwave photon pulses at the single-photon level. A superconducting multiresonator system which is composed of a set of frequency-tunable coplanar waveguide resonators is implemented as th...

M. Geller, A. Arrasmith, Zoe Holmes +3 more·Jun 30, 2021

There is great interest in using near-term quantum computers to simulate and study foundational problems in quantum mechanics and quantum information science, such as the scrambling measured by an out-of-time-ordered correlator (OTOC). Here we use an...

Yuta Shingu, Yuki Takeuchi, Suguru Endo +5 more·Jun 30, 2021

Variational quantum algorithms (VQAs) have been considered to be useful applications of noisy intermediate-scale quantum (NISQ) devices. Typically, in the VQAs, a parametrized ansatz circuit is used to generate a trial wave function, and the paramete...

Mogens Dalgaard, F. Motzoi, J. Sherson·Jun 30, 2021

State-of-the-art quantum algorithms routinely tune dynamically parametrized cost functionals for combinatorics, machine learning, equation-solving, or energy minimization. However, large search complexity often demands many (noisy) quantum measuremen...

Andres Giraldo-Carvajal, Daniel A. Duque-Ramirez, J. Jaramillo-Villegas·Jun 30, 2021

The use of classical computers to simulate quantum computing has been successful in aiding the study of quantum algorithms and circuits that are too complex to examine analytically. Current implementations of quantum computing simulators are limited ...

B. Yoshida·Jun 29, 2021

The Hayden-Preskill recovery problem has provided useful insights on physics of quantum black holes as well as dynamics in quantum many-body systems from the viewpoint of quantum errorcorrecting codes. While finding an efficient universal information...

Yuxuan Du, D. Tao·Jun 29, 2021

The frequent interactions between quantum computing and machine learning revolutionize both fields. One prototypical achievement is the quantum auto-encoder (QAE), as the leading strategy to relieve the curse of dimensionality ubiquitous in the quant...

A. Krasnok, Andrea Al'u·Jun 29, 2021

Photonics and optoelectronics are at the foundations of widespread technologies, from high-speed Internet to systems for artificial intelligence, automotive LiDAR, and optical quantum computing. Light enables ultrafast speeds and low energy for all-o...

K. Emerole·Jun 29, 2021

The syndrome decoding problem has been proposed as a computational hardness assumption for code based cryptosystem that are safe against quantum computing. The problem has been reduced to finding the codeword with the smallest non-zero columns that w...

Fatemeh Tarighitabesh, Q. Hassanzada, M. Hadian +3 more·Jun 29, 2021

We propose an electromechanical scheme where the electronic degrees of freedom of boron vacancy color centers hosted by a hexagonal boron nitride (hBN) nanoribbon are coupled for quantum information processing. The mutual coupling of color centers is...

P. Boross, A. P'alyi·Jun 29, 2021

Quantum bits based on Majorana zero modes are expected to be robust against certain noise types, and hence provide a quantum computing platform that is superior to conventional qubits. This robustness is not complete though: imperfections can still l...

H.-X. Yang, J.-Y. Ma, Y. Wu +7 more·Jun 28, 2021

Trapped ions constitute one of the most promising systems for implementing quantum computing and networking1,2. For large-scale ion-trap-based quantum computers and networks, it is critical to have two types of qubit: one for computation and storage,...

Yuxuan Du, Yan Qian, D. Tao·Jun 24, 2021

Variational quantum algorithms (VQAs) have the potential of utilizing near-term quantum machines to gain certain computational advantages over classical methods. Nevertheless, modern VQAs suffer from cumbersome computational overhead, hampered by the...

Xin Wang, Hong-rong Li·Jun 24, 2021

In superconducting quantum circuits (SQCs), chiral routing quantum information is often realized with the ferrite circulators, which are usually bulky, lossy and require strong magnetic fields. To overcome those problems, we propose a novel method to...

Augustin Vanrietvelde, G. Chiribella·Jun 23, 2021

No quantum circuit can turn a completely unknown unitary gate into its coherently controlled version. Yet, coherent control of unknown gates has been realised in experiments, making use of a different type of initial resources. Here, we formalise the...

Hsin-Yuan Huang, R. Kueng, G. Torlai +2 more·Jun 23, 2021

Classical machine learning (ML) provides a potentially powerful approach to solving challenging quantum many-body problems in physics and chemistry. However, the advantages of ML over traditional methods have not been firmly established. In this work...