Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Compiler Optimization for Quantum Computing Using Reinforcement Learning
Nils Quetschlich, Lukas Burgholzer, R. Wille·Dec 8, 2022
Any quantum computing application, once encoded as a quantum circuit, must be compiled before being executable on a quantum computer. Similar to classical compilation, quantum compilation is a sequential process with many compilation steps and numero...
Universal Qudit Gate Synthesis for Transmons
Laurin E. Fischer, A. Chiesa, F. Tacchino +3 more·Dec 8, 2022
Gate-based quantum computers typically encode and process information in two-dimensional units called qubits. Using $d$-dimensional qudits instead may offer intrinsic advantages, including more efficient circuit synthesis, problem-tailored encodings ...
Twin-Field Quantum Key Distribution without Phase Locking.
Wei Li, Likang Zhang, Yichen Lu +11 more·Dec 8, 2022
Twin-field quantum key distribution (TF-QKD) has emerged as a promising solution for practical quantum communication over long-haul fiber. However, previous demonstrations on TF-QKD require the phase locking technique to coherently control the twin l...
Correlation as a Resource in Unitary Quantum Measurements
Vishal Johnson, Ashmeet Singh, Reimar Leike +2 more·Dec 7, 2022
Quantum measurement is a physical process. What physical resources and constraints does quantum mechanics require for measurement to produce the classical world we observe? Treating measurement as a fully unitary quantum process, our goal is to show ...
Review of ansatz designing techniques for variational quantum algorithms
Junhan Qin·Dec 7, 2022
For a large number of tasks, quantum computing demonstrates the potential for exponential acceleration over classical computing. In the NISQ era, variable-component subcircuits enable applications of quantum computing. To reduce the inherent noise an...
Controlling photon polarisation with a single quantum dot spin
E. Mehdi, Manuel Gundin-Martinez, C. Millet +9 more·Dec 7, 2022
In the framework of optical quantum computing and communications, a major objective consists in building receiving nodes that implement conditional operations on incoming photons, using the interaction with a single stationary qubit. In particular, t...
Quantum Lower Bounds for Finding Stationary Points of Nonconvex Functions
Chenyi Zhang, Tongyang Li·Dec 7, 2022
Quantum algorithms for optimization problems are of general interest. Despite recent progress in classical lower bounds for nonconvex optimization under different settings and quantum lower bounds for convex optimization, quantum lower bounds for non...
Implementation and Learning of Quantum Hidden Markov Models
Vanio Markov, V. Rastunkov, Amol Deshmukh +2 more·Dec 7, 2022
In this article, we use the theory of quantum channels and open quantum systems to provide an efficient unitary characterization of a class of stochastic generators known as quantum hidden Markov models (QHMMs). By utilizing the unitary characterizat...
Quantum algorithm for time-dependent differential equations using Dyson series
D. Berry, Pedro C. S. Costa·Dec 7, 2022
Time-dependent linear differential equations are a common type of problem that needs to be solved in classical physics. Here we provide a quantum algorithm for solving time-dependent linear differential equations with logarithmic dependence of the co...
Single-shot error mitigation by coherent Pauli checks
Ewout van den Berg, S. Bravyi, J. Gambetta +3 more·Dec 7, 2022
Generating samples from the output distribution of a quantum circuit is a ubiquitous task used as a building block of many quantum algorithms. Here we show how to accomplish this task on a noisy quantum processor lacking full-blown error correction f...
Scaling Qubit Readout with Hardware Efficient Machine Learning Architectures
Satvik Maurya, Chaithanya Naik Mude, W. Oliver +2 more·Dec 7, 2022
Reading a qubit is a fundamental operation in quantum computing. It translates quantum information into classical information enabling subsequent classification to assign the qubit states '0' or '1'. Unfortunately, qubit readout is one of the most er...
Computing linear sections of varieties: quantum entanglement, tensor decompositions and beyond
N. Johnston, B. Lovitz, Aravindan Vijayaraghavan·Dec 7, 2022
We study the problem of finding elements in the intersection of an arbitrary conic variety in $\mathbb{F}^{n}$ with a given linear subspace (where $\mathbb{F}$ can be the real or complex field). This problem captures a rich family of algorithmic prob...
Manifold Learning for Dimensionality Reduction: Quantum Isomap algorithm
Wei Feng, Gongde Guo, Kai Yu +2 more·Dec 7, 2022
Isomap algorithm is a representative manifold learning algorithm. The algorithm simplifies the data analysis process and is widely used in neuroimaging, spectral analysis and other fields. However, the classic Isomap algorithm becomes unwieldy when d...
Trotter Errors and the Emergence of Chaos in Quantum Simulation
Kevin W. Kuper, Jon Pajaud, Karthik Chinni +2 more·Dec 7, 2022
As noisy intermediate-scale quantum (NISQ) processors increase in size and complexity, their use as general purpose quantum simulators will rely on algorithms based on the Trotter-Suzuki expansion. We run quantum simulations on a small, highly accura...
Universal Kardar-Parisi-Zhang scaling in noisy hybrid quantum circuits
Shuo Liu, Ming-Rui Li, Shi-Xin Zhang +2 more·Dec 7, 2022
Measurement-induced phase transitions (MIPT) have attracted increasing attention due to the rich phenomenology of entanglement structures and their relation with quantum information processing. Since physical systems are unavoidably coupled to enviro...
Self-protected quantum simulation and quantum phase estimation in the presence of classical noise
L. -A. Wu·Dec 7, 2022
The decoherence phenomenon inevitably exists in quantum computing processes. Consequently, dynamic suppression of decoherence for instance via dynamical decoupling, quantum error correction codes (QECC) etc. is crucial in accurately executing known o...
Optimal Quantum Algorithm for Vector Interpolation
Sophie Decoppet·Dec 7, 2022
In this paper we study the functions that can be learned through the polynomial interpolation quantum algorithm designed by Childs et al. This algorithm was initially intended to find the coefficients of a multivariate polynomial function defined on ...
Scaling Network Topologies for Multi-User Entanglement Distribution
Muhammad Daud, Aeysha Khalique·Dec 6, 2022
Future quantum internet relies on large-scale entanglement distribution. Quantum decoherence is a significant obstacle in large-scale networks, which otherwise perform better with multiple paths between the source and destination. We propose a new to...
A Realizable GAS-based Quantum Algorithm for Traveling Salesman Problem
Jieao Zhu, Yihuai Gao, Hanrui Wang +2 more·Dec 6, 2022
The paper proposes a quantum algorithm for the traveling salesman problem (TSP) based on the Grover Adaptive Search (GAS), which can be successfully executed on IBM's Qiskit library. Under the GAS framework, there are at least two fundamental difficu...
Generation of Perfectly Entangled Two and Three Qubits States by Classical Random Interaction
Javed Akram·Dec 6, 2022
This study examines the possibility of finding perfect entanglers for a Hamiltonian which corresponds to several quantum information platforms of interest at the present time. However, in this study, a superconducting circuit is used that stands out ...