Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Timing Constraints Due to Real-Time Graph-Traversal Algorithms on Incomplete Cluster States in Photonic Measurement-Based Quantum Computing
J. Scott, K. Balram·Aug 31, 2022
Understanding the computational overheads imposed by classical control systems on quantum computing platforms becomes critically important as these quantum machines grow in scale and complexity. In this work, we calculate the overheads imposed by the...
Variational Quantum Circuits for Multi-Qubit Gate Automata
Arunava Majumder, D. Lewis, Akshaya Jayashankar +2 more·Aug 31, 2022
Implementing quantum operations in the form of natural Hamiltonian dynamics is desirable, since they almost require no external control or feedback. In this work, we propose a NISQ-friendly quantum-classical hybrid approach to designing a time-indepe...
Cycle index polynomials and generalized quantum separability tests
Zachary P. Bradshaw, Margarite L. LaBorde, M. Wilde·Aug 31, 2022
The mixedness of one share of a pure bipartite state determines whether the overall state is a separable, unentangled one. Here we consider quantum computational tests of mixedness, and we derive an exact expression of the acceptance probability of s...
Optimizing the number of CNOT gates in one-dimensional nearest-neighbor quantum Fourier transform circuit
Byeongyong Park, Doyeol Ahn Department of Electrical, Computer Engineering +9 more·Aug 30, 2022
: The physical limitations of quantum hardware often require nearest-neighbor qubit structures, in which two-qubit gates are required to construct nearest-neighbor quantum circuits. However, two-qubit gates are considered a major cost of quantum circ...
Let Each Quantum Bit Choose Its Basis Gates
S. Lin, S. Sussman, Casey Duckering +5 more·Aug 29, 2022
Near-term quantum computers are primarily limited by errors in quantum operations (or gates) between two quantum bits (or qubits). A physical machine typically provides a set of basis gates that include primitive 2-qubit (2Q) and 1-qubit (1Q) gates t...
A scheme to create and verify scalable entanglement in optical lattice
You Zhou, Bo Xiao, Meng-Da Li +4 more·Aug 29, 2022
To achieve scalable quantum information processing, great efforts have been devoted to the creation of large-scale entangled states in various physical systems. Ultracold atom in optical lattice is considered as one of the promising platforms due to ...
Synergistic pretraining of parametrized quantum circuits via tensor networks
Manuel S. Rudolph, J. Miller, Danial Motlagh +3 more·Aug 29, 2022
Parametrized quantum circuits (PQCs) represent a promising framework for using present-day quantum hardware to solve diverse problems in materials science, quantum chemistry, and machine learning. We introduce a “synergistic” approach that addresses ...
Controlled gate networks: theory and application to eigenvalue estimation
Max Bee-Lindgren, Zhengrong Qian, M. DeCross +5 more·Aug 29, 2022
We introduce a new scheme for quantum circuit design called controlled gate networks. Rather than trying to reduce the complexity of individual unitary operations, the new strategy is to toggle between all of the unitary operations needed with the fe...
AutoQML: Automatic Generation and Training of Robust Quantum-Inspired Classifiers by Using Genetic Algorithms on Grayscale Images
Sergio Altares-L'opez, J. J. Garc'ia-Ripoll, Ángela Ribeiro·Aug 28, 2022
We propose a new hybrid system for automatically generating and training quantum-inspired classifiers on grayscale images by using multiobjective genetic algorithms. We define a dynamic fitness function to obtain the smallest possible circuit and hig...
Singly-excited resonant open quantum system Tavis-Cummings model with quantum circuit mapping
M. K. Marinković, Marina Radulaski·Aug 25, 2022
Tavis-Cummings (TC) cavity quantum electrodynamical effects, describing the interaction of N atoms with an optical resonator, are at the core of atomic, optical and solid state physics. The full numerical simulation of TC dynamics scales exponentiall...
A SAT Encoding for Optimal Clifford Circuit Synthesis
Sarah Schneider, Lukas Burgholzer, Robert Wille·Aug 24, 2022
Executing quantum algorithms on a quantum computer requires compilation to representations that conform to all restrictions imposed by the device. Due to devices' limited coherence times and gate fidelities, the compilation process has to be optimize...
Alternative approach to quantum imaginary time evolution
P. Jouzdani, Calvin W. Johnson, E. Mucciolo +1 more·Aug 22, 2022
There is increasing interest in quantum algorithms that are based on the imaginary-time evolution (ITE), a successful classical numerical approach to obtain ground states. However, most of the proposals so far require heavy post-processing computatio...
A hybrid classical-quantum algorithm for digital image processing
Alok Shukla, P. Vedula·Aug 20, 2022
A hybrid classical-quantum approach for evaluation of multi-dimensional Walsh–Hadamard transforms and its applications to quantum image processing are proposed. In this approach, multi-dimensional Walsh–Hadamard transforms are obtained using quantum ...
Adaptive POVM implementations and measurement error mitigation strategies for near-term quantum devices
A. Glos, A. Nykanen, Elsi-Mari Borrelli +4 more·Aug 16, 2022
We present adaptive measurement techniques tailored for variational quantum algorithms on near-term small and noisy devices. In particular, we generalise earlier learning to measure strategies in two ways. First, by considering a class of adaptive po...
Towards the simulation of transition-metal oxides of the cathode battery materials using VQE methods
M. Farag, J. Ghosh·Aug 16, 2022
Variational quantum eigensolver (VQE) is a hybrid quantum-classical technique that leverages noisy intermediate scale quantum (NISQ) hardware to obtain the minimum eigenvalue of a model Hamiltonian. VQE has so far been used to simulate condensed matt...
Modeling and simulation of a quantum thermal noise on the qubit
F. Chapeau-Blondeau·Aug 15, 2022
Quantum noise or decoherence is a major factor impacting the performance of quantum technologies. On the qubit, an important quantum noise, often relevant in practice, is the thermal noise or generalized amplitude damping noise, describing the intera...
Time-marching based quantum solvers for time-dependent linear differential equations
Di Fang, Lin Lin, Yu Tong·Aug 14, 2022
The time-marching strategy, which propagates the solution from one time step to the next, is a natural strategy for solving time-dependent differential equations on classical computers, as well as for solving the Hamiltonian simulation problem on qua...
Imperfect Quantum Photonic Neural Networks
Jacob Ewaniuk, J. Carolan, B. Shastri +1 more·Aug 13, 2022
Quantum photonic neural networks are variational photonic circuits that can be trained to implement high‐fidelity quantum operations. However, work‐to‐date has assumed idealized components, including a perfect π Kerr nonlinearity. This work investiga...
CollComm: Enabling Efficient Collective Quantum Communication Based on EPR buffering
Anbang Wu, Yufei Ding, A. Li·Aug 13, 2022
The noisy and lengthy nature of quantum communication hinders the development of distributed quantum computing. The inefficient design of existing compilers for distributed quantum computing worsens the situation. Previous compilation frameworks coup...
Evaluating the resilience of variational quantum algorithms to leakage noise
Chen Ding, Xiao-Yue Xu, Shuo Zhang +2 more·Aug 10, 2022
As we are entering the era of constructing practical quantum computers, suppressing the inevitable noise to accomplish reliable computational tasks will be the primary goal. Leakage noise, as the amplitude population leaking outside the qubit subspac...