Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Application of quantum computing to a linear non-Gaussian acyclic model for novel medical knowledge discovery
H. Kawaguchi·Oct 9, 2021
Recently, the utilization of real-world medical data collected from clinical sites has been attracting attention. Especially as the number of variables in real-world medical data increases, causal discovery becomes more and more effective. On the oth...
Experimentally accessible nonseparability criteria for multipartite-entanglement-structure detection
Guillermo Garc'ia-P'erez, Oskari Kerppo, M. Rossi +1 more·Oct 8, 2021
The description of the complex separability structure of quantum states in terms of partially ordered sets has been recently put forward. In this work, we address the question of how to efficiently determine these structures for unknown states. We pr...
Shadow process tomography of quantum channels
Jonathan Kunjummen, Minh C. Tran, D. Carney +1 more·Oct 7, 2021
Quantum process tomography is a critical capability for building quantum computers, enabling quantum networks, and understanding quantum sensors. Like quantum state tomography, the process tomography of an arbitrary quantum channel requires a number ...
Large-bandwidth Transduction Between an Optical Single Quantum Dot Molecule and a Superconducting Resonator
Yuta Tsuchimoto, Zhe Sun, E. Togan +6 more·Oct 7, 2021
Quantum transduction between the microwave and optical domains is an outstanding challenge for long-distance quantum networks based on superconducting qubits. For all transducers realized to date, the generally weak light-matter coupling does not all...
Detecting confined and deconfined spinons in dynamical quantum simulations
Qiao Li, J. Cui, Wei Li·Oct 5, 2021
Dynamical spin-structure factor (DSF) contains fingerprint information of collective excitations in interacting quantum spin systems. In solid state experiments, DSF can be measured through neutron scatterings. However, it is in general challenging t...
Quantum Blockchain Based on Dimensional Lifting Generalized Gram-Schmidt Procedure
K. Nilesh, P. Panigrahi·Oct 5, 2021
The advancement of quantum computers undermines the security of classical blockchain, necessitating either a post-quantum upgrade of the existing architecture or creation of an inherently quantum blockchain. Here we propose a practically realizable m...
Machine learning statistical gravity from multi-region entanglement entropy
J. Lam, Yi-Zhuang You·Oct 3, 2021
The Ryu-Takayanagi formula directly connects quantum entanglement and geometry. Yet the assumption of static geometry lead to an exponentially small mutual information between far-separated disjoint regions, which does not hold in many systems such a...
Pseudo Quantum Random Number Generator with Quantum Permutation Pad
Randy Kuang, Dafu Lou, Alex He +2 more·Oct 1, 2021
Cryptographic random number generation is critical for any quantum-safe encryption. Based on the natural uncertainty of some quantum processes, a variety of quantum random number generators, or QRNGs, have been created with physical quantum processes...
Parity measurement in the strong dispersive regime of circuit quantum acoustodynamics
Uwe von Lüpke, Yu Yang, Marius Bild +3 more·Oct 1, 2021
Mechanical resonators are emerging as an important new platform for quantum science and technologies. A large number of proposals for using them to store, process and transduce quantum information motivates the development of increasingly sophisticat...
Stream privacy amplification for quantum cryptography
Yizhi Huang, Xingjian Zhang, Xiongfeng Ma·Oct 1, 2021
Privacy amplification is the key step to guarantee the security of quantum communication. The existing security proofs require accumulating a large number of raw key bits for privacy amplification. This is similar to block ciphers in classical cryp...
Spin-wave quantum computing with atoms in a single-mode cavity
K. Cox, P. Bienias, D. H. Meyer +3 more·Sep 30, 2021
We present a method for network-capable quantum computing that relies on holographic spin-wave excitations stored collectively in ensembles of qubits. We construct an orthogonal basis of spin waves in a one-dimensional array and show that high-fidelit...
Quantum causal unravelling
Ge Bai, Yadong Wu, Yan Zhu +2 more·Sep 27, 2021
Complex processes often arise from sequences of simpler interactions involving a few particles at a time. These interactions, however, may not be directly accessible to experiments. Here we develop the first efficient method for unravelling the causa...
Digital quantum simulation of NMR experiments
K. Seetharam, D. Biswas, C. Noel +8 more·Sep 27, 2021
Simulations of nuclear magnetic resonance (NMR) experiments can be an important tool for extracting information about molecular structure and optimizing experimental protocols but are often intractable on classical computers for large molecules such ...
Performance of the quantum MaxEnt estimation in the presence of physical symmetries
Diego Tielas, M. Losada, L. Rebón +1 more·Sep 22, 2021
When an informationally complete measurement is not available, the reconstruction of the density operator that describes the state of a quantum system can be obtained, in a reliable way, by adopting the maximum entropy principle (MaxEnt principle), a...
Near-Term Efficient Quantum Algorithms for Entanglement Analysis
Ranyiliu Chen, Benchi Zhao, Xin Wang·Sep 22, 2021
Entanglement plays a crucial role in quantum physics and is the key resource in quantum information processing. However, entanglement detection and quantification are believed to be hard due to the operational impracticality of existing methods. This...
Parametrized process characterization with reduced resource requirements
Vicente Leyton-Ortega, Tyler Kharazi, R. Pooser·Sep 22, 2021
Quantum Process Tomography (QPT) is a powerful tool to characterize quantum operations, but it requires considerable resources making it impractical for more than 2-qubit systems. This work proposes an alternative approach that requires significantly...
Machine-Learning Side-Channel Attacks on the GALACTICS Constant-Time Implementation of BLISS
Soundes Marzougui, Nils Wisiol, Patrick Gersch +2 more·Sep 20, 2021
Due to the advancing development of quantum computers, practical attacks on conventional public-key cryptography may become feasible in the next few decades. To address this risk, post-quantum schemes that are assumed to be secure against quantum att...
On Infinite Families of Narrow-Sense Antiprimitive BCH Codes Admitting 3-Transitive Automorphism Groups and Their Consequences
Qi Liu, C. Ding, Sihem Mesnager +2 more·Sep 19, 2021
The Bose-Chaudhuri-Hocquenghem (BCH) codes are a well-studied subclass of cyclic codes that have found numerous applications in error correction and notably in quantum information processing. They are widely used in data storage and communication sys...
Decoding the Entanglement Structure of Monitored Quantum Circuits
B. Yoshida·Sep 17, 2021
Given an output wavefunction of a monitored quantum circuit consisting of both unitary gates and projective measurements, we ask whether two complementary subsystems are entangled or not. For Clifford circuits, we find that this question can be mappe...
Investigation of photon emitters in Ce-implanted hexagonal boron nitride
Gabriel I. L'opez-Morales, Mingxing Li, A. Hampel +9 more·Sep 17, 2021
Color centers in hexagonal boron nitride (hBN) are presently attracting broad interest as a novel platform for nanoscale sensing and quantum information processing. Unfortunately, their atomic structures remain largely elusive and only a small percen...