Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Encoding quantum bits in bound electronic states of a graphene nanotorus
J. Furtado, A. Ramos, J. E. G. Silva +2 more·Mar 24, 2022
We propose to use the quantum states of an electron trapped on the inner surface of a graphene nanotorus to realize as a new kind of physical quantum bit, which can be used to encode quantum information. Fundamental tasks for quantum information proc...
The power of qutrits for non-adaptive measurement-based quantum computing
Jelena Mackeprang, Daniel Bhatti, M. Hoban +1 more·Mar 23, 2022
Non-locality is not only one of the most prominent quantum features but can also serve as a resource for various information-theoretical tasks. Analysing it from an information-theoretical perspective has linked it to applications such as non-adaptiv...
Factor Graphs for Quantum Information Processing
Michael X. Cao·Mar 23, 2022
[...] In this thesis, we are interested in generalizing factor graphs and the relevant methods toward describing quantum systems. Two generalizations of classical graphical models are investigated, namely double-edge factor graphs (DeFGs) and quantum...
Charge detection using a WSe$_2$ van der Waals heterostructure
Justin Boddison-Chouinard, A. Bogan, N. Fong +6 more·Mar 22, 2022
Detecting single charging events in quantum devices is an important step towards realizing practical quantum circuits for quantum information processing. In this work, we demonstrate that van der Waals heterostructure devices with gated nano-constric...
Information loss and run time from practical application of quantum data compression
Saahil Patel, Benjamin Collis, William Duong +4 more·Mar 21, 2022
We examine information loss, resource costs, and run time from practical application of quantum data compression. Compressing quantum data to fewer qubits enables efficient use of resources, as well as applications for quantum communication and denoi...
Improving quantum simulation efficiency of final state radiation with dynamic quantum circuits
Platon C. Deliyannis, James Sud, Diana Chamaki +3 more·Mar 18, 2022
Reference arXiv:1904.03196 recently introduced an algorithm (QPS) for simulating parton showers with intermediate flavor states using polynomial resources on a digital quantum computer. We make use of a new quantum hardware capability called dynamica...
Quantum computing for data analysis in high energy physics
Andrea Delgado, Kathleen E. Hamilton, Prasanna Date +22 more·Mar 15, 2022
Some of the biggest achievements of the modern era of particle physics, such as the discovery of the Higgs boson, have been made possible by the tremendous effort in building and operating large-scale experiments like the Large Hadron Collider or the...
Ancilla-free implementation of generalized measurements for qubits embedded in a qudit space
Laurin E. Fischer, Daniel Miller, F. Tacchino +3 more·Mar 14, 2022
Informationally complete (IC) positive operator-valued measures (POVMs) are generalized quantum measurements that offer advantages over the standard computational basis readout of qubits. For instance, IC-POVMs enable efficient extraction of operator...
Psitrum: An open source simulator for universal quantum computers
Mohammed Alghadeer, Eid Aldawsari, R. Selvarajan +3 more·Mar 14, 2022
Quantum computing is a radical new paradigm for a technology that is capable to revolutionise information processing. Simulators of universal quantum computer are important for understanding the basic principles and operations of the current noisy in...
Ion Coulomb Crystals in Storage Rings for Quantum Information Science
S. Brooks, K. Brown, F. M'eot +29 more·Mar 14, 2022
Quantum information science is a growing field that promises to take computing into a new age of higher performance and larger scale computing as well as being capable of solving problems classical computers are incapable of solving. The outstanding ...
Finite-Key Analysis of Quantum Key Distribution with Characterized Devices Using Entropy Accumulation
Ian George, Jie Lin, Thomas van Himbeeck +2 more·Mar 13, 2022
The Entropy Accumulation Theorem (EAT) was introduced to significantly improve the finite-size rates for device-independent quantum information processing tasks such as device-independent quantum key distribution (QKD). A natural question would be wh...
Effects of XX-catalysts on quantum annealing spectra with perturbative crossings
Natasha Feinstein, L. Fry-Bouriaux, S. Bose +1 more·Mar 13, 2022
In adiabatic quantum annealing the required run-time to reach a given ground-state fidelity is dictated by the size of the minimum gap that appears between the ground and first excited state in the annealing spectrum. In general the presence of avoid...
Quantum information with top quarks in QCD
Y. Afik, J. R. M. Nova·Mar 10, 2022
Top quarks represent unique high-energy systems since their spin correlations can be measured, thus allowing to study fundamental aspects of quantum mechanics with qubits at high-energy colliders. We present here the general framework of the quantum ...
Improved Decoding of Circuit Noise and Fragile Boundaries of Tailored Surface Codes
O. Higgott, T. Bohdanowicz, Aleksander Kubica +2 more·Mar 9, 2022
Realizing the full potential of quantum computation requires quantum error correction (QEC), with most recent breakthrough demonstrations of QEC using the surface code. QEC codes use multiple noisy physical qubits to encode information in fewer logic...
Information recoverability of noisy quantum states
Xuanqiang Zhao, Benchi Zhao, Zihan Xia +1 more·Mar 9, 2022
Extracting classical information from quantum systems is an essential step of many quantum algorithms. However, this information could be corrupted as the systems are prone to quantum noises, and its distortion under quantum dynamics has not been ade...
Quantifying Grover speed-ups beyond asymptotic analysis
Chris Cade, Marten Folkertsma, I. Niesen +1 more·Mar 9, 2022
Run-times of quantum algorithms are often studied via an asymptotic, worst-case analysis. Whilst useful, such a comparison can often fall short: it is not uncommon for algorithms with a large worst-case run-time to end up performing well on instances...
Transformations of Stabilizer States in Quantum Networks
Matthias Englbrecht, Tristan Kraft, B. Kraus·Mar 8, 2022
Stabilizer states and graph states find application in quantum error correction, measurement-based quantum computation and various other concepts in quantum information theory. In this work, we study party-local Clifford (PLC) transformations among s...
Quantum spectral clustering algorithm for unsupervised learning
Qing Li, Yuhan Huang, Shan Jin +2 more·Mar 7, 2022
Clustering is one of the most crucial problems in unsupervised learning, and the well-known k-means algorithm can be implemented on a quantum computer with a significant speedup. However, for the clustering problems that cannot be solved using the k-...
Differential Privacy Amplification in Quantum and Quantum-inspired Algorithms
Armando Angrisani, Mina Doosti, E. Kashefi·Mar 7, 2022
Differential privacy provides a theoretical framework for processing a dataset about $n$ users, in a way that the output reveals a minimal information about any single user. Such notion of privacy is usually ensured by noise-adding mechanisms and amp...
Adaptive quantum codes: constructions, applications and fault tolerance
Akshaya Jayashankar·Mar 7, 2022
A major obstacle towards realizing a practical quantum computer is the noise that arises due to system-environment interactions. While it is very well known that quantum error correction (QEC) provides a way to protect against errors that arise due t...