Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Two-Qutrit entanglement: 56-years old algorithm challenges machine learning
Marcin Wie'sniak·Nov 6, 2022
Classifying states as entangled or separable is a highly challenging task, while it is also one of the foundations of quantum information processing theory. This task is higly nontrivial even for relatively simple cases, such as two-qutrit Bell-diago...
Matrix Multiplicative Weights Updates in Quantum Zero-Sum Games: Conservation Laws & Recurrence
Rahul Jain, G. Piliouras, Ryann Sim·Nov 3, 2022
Recent advances in quantum computing and in particular, the introduction of quantum GANs, have led to increased interest in quantum zero-sum game theory, extending the scope of learning algorithms for classical games into the quantum realm. In this p...
Entanglement complexity of the Rokhsar-Kivelson-sign wavefunctions
Stefano Piemontese, T. Roscilde, A. Hamma·Nov 2, 2022
In this paper we study the transitions of entanglement complexity in an exemplary family of states - the Rokhsar-Kivelson-sign wavefunctions - whose degree of entanglement is controlled by a single parameter. This family of states is known to feature...
Programmable adiabatic demagnetization for systems with trivial and topological excitations
A. Matthies, M. Rudner, A. Rosch +1 more·Oct 31, 2022
We propose a simple, robust protocol to prepare a low-energy state of an arbitrary Hamiltonian on a quantum computer or programmable quantum simulator. The protocol is inspired by the adiabatic demagnetization technique, used to cool solid-state syst...
Unclonability and Quantum Cryptanalysis: From Foundations to Applications
Mina Doosti·Oct 31, 2022
The impossibility of creating perfect identical copies of unknown quantum systems is a fundamental concept in quantum theory and one of the main non-classical properties of quantum information. This limitation imposed by quantum mechanics, famously k...
Modeling noise in global Mølmer-Sørensen interactions applied to quantum approximate optimization
Phillip C. Lotshaw, Kevin D. Battles, Bryan T. Gard +3 more·Oct 31, 2022
Many-qubit Molmer-Sorensen (MS) interactions applied to trapped ions offer unique capabilities for quantum information processing, with applications including quantum simulation and the quantum approximate optimization algorithm (QAOA). Here, we deve...
Realizing a deep reinforcement learning agent discovering real-time feedback control strategies for a quantum system
K. Reuer, Jonas Landgraf, T. Fosel +10 more·Oct 30, 2022
To realize the full potential of quantum technologies, finding good strategies to control quantum information processing devices in real time becomes increasingly important. Usually these strategies require a precise understanding of the device itsel...
Time-Domain Universal Linear-Optical Operations for Universal Quantum Information Processing.
Kazuma Yonezu, Y. Enomoto, Takato Yoshida +1 more·Oct 28, 2022
We demonstrate universal and programmable three-mode linear-optical operations in the time domain by realizing a scalable dual-loop optical circuit suitable for universal quantum information processing (QIP). The programmability, validity, and determ...
Quantum-enhanced mean value estimation via adaptive measurement
Kaito Wada, Kazuma Fukuchi, Naoki Yamamoto·Oct 27, 2022
Quantum-enhanced (i.e., higher performance by quantum effects than any classical methods) mean value estimation of observables is a fundamental task in various quantum technologies; in particular, it is an essential subroutine in quantum computing al...
Mechanism of Universal Quantum Computation in the Brain
Aman Chawla, S. Morgera·Oct 26, 2022
In this paper the authors extend [1] and provide more details of how the brain may act like a quantum computer. In particular, positing the difference between voltages on two axons as the environment for ions undergoing spatial superposition, we argu...
Operational Metric for Quantum Chaos and the Corresponding Spatiotemporal-Entanglement Structure
Neil Dowling, K. Modi·Oct 26, 2022
Chaotic systems are highly sensitive to a small perturbation, and are ubiquitous throughout biological sciences, physical sciences and even social sciences. Taking this as the underlying principle, we construct an operational notion for quantum chaos...
A Depolarizing Noise-aware Transpiler for Optimal Amplitude Amplification
Debashis Ganguly, Wonsun Ahn·Oct 25, 2022
Amplitude amplification provides a quadratic speed-up for an array of quantum algorithms when run on a quantum machine perfectly isolated from its environment. However, the advantage is substantially diminished as the NISQ-era quantum machines lack th...
Digital Quantum Simulation and Circuit Learning for the Generation of Coherent States
Ruilin Liu, Sebastián V. Romero, I. Oregi +3 more·Oct 25, 2022
Coherent states, known as displaced vacuum states, play an important role in quantum information processing, quantum machine learning, and quantum optics. In this article, two ways to digitally prepare coherent states in quantum circuits are introduc...
Implementation of Trained Factorization Machine Recommendation System on Quantum Annealer
Chen-Yu Liu, Hsin-Yu Wang, Pei-Yen Liao +2 more·Oct 24, 2022
Factorization Machine (FM) is the most commonly used model to build a recommendation system since it can incorporate side information to improve performance. However, producing item suggestions for a given user with a trained FM is time-consuming. To...
A quantum algorithm for finding collision-inducing disturbance vectors in SHA-1
Jiheng Duan, Minghui Li, H. Ian·Oct 23, 2022
Modern cryptographic protocols rely on sophisticated hash functions to generate quasi-unique numbers that serve as signatures for user authentication and other security verifications. The security could be compromised by finding texts hash-mappable t...
Electron charge qubit with 0.1 millisecond coherence time
Xianjing Zhou, Xinhao Li, Qianfan Chen +9 more·Oct 22, 2022
Electron charge qubits are compelling candidates for solid-state quantum computing because of their inherent simplicity in qubit design, fabrication, control and readout. However, electron charge qubits built on conventional semiconductors and superc...
Stochastic Qubit Resource Allocation for Quantum Cloud Computing
Rakpong Kaewpuang, Minrui Xu, D. Niyato +3 more·Oct 22, 2022
Quantum cloud computing is a promising paradigm for efficiently provisioning quantum resources (i.e., qubits) to users. In quantum cloud computing, quantum cloud providers provision quantum resources in reservation and on-demand plans for users. Lite...
Quantum algorithms for geologic fracture networks
Jessie M. Henderson, M. Podzorova, M. Cerezo +4 more·Oct 21, 2022
Solving large systems of equations is a challenge for modeling natural phenomena, such as simulating subsurface flow. To avoid systems that are intractable on current computers, it is often necessary to neglect information at small scales, an approac...
Coherence requirements for quantum communication from hybrid circuit dynamics
S. Kelly, U. Poschinger, F. Schmidt-Kaler +2 more·Oct 20, 2022
The coherent superposition of quantum states is an important resource for quantum information processing which distinguishes quantum dynamics and information from their classical counterparts. In this article we determine the coherence requirements t...
Classical half-adder using trapped-ion quantum bits: Toward energy-efficient computation
Sagar Silva Pratapsi, P. Huber, Patrick Barthel +3 more·Oct 19, 2022
Reversible computation has been proposed as a future paradigm for energy efficient computation, but so far few implementations have been realized in practice. Quantum circuits, running on quantum computers, are one construct known to be reversible. I...