Papers
Live trends in quantum computing research, updated daily from arXiv.
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Quantum Variational Rewinding for Time Series Anomaly Detection
J. Baker, H. Horowitz, Santosh Kumar Radha +6 more·Oct 28, 2022
We explore a new quantum computing approach to time series anomaly detection (TAD). Our approach - Quantum Variational Rewinding (QVR) - trains a family of parameterized unitary time-devolution operators to cluster normal time series instances encode...
Stochastic Approach for Simulating Quantum Noise Using Tensor Networks
W. Berquist, Danylo Lykov, Minzhao Liu +1 more·Oct 28, 2022
Noisy quantum simulation is challenging since one has to take into account the stochastic nature of the process. The dominating method for it is the density matrix approach. In this paper, we evaluate conditions for which this method is inferior to a...
Digital Quantum Simulation of the Spin-Boson Model under Markovian Open-System Dynamics
Andreas Burger, L. Kwek, D. Poletti·Oct 28, 2022
Digital quantum computers have the potential to simulate complex quantum systems. The spin-boson model is one of such systems, used in disparate physical domains. Importantly, in a number of setups, the spin-boson model is open, i.e., the system is i...
Selection and Improvement of Product Formulae for Best Performance of Quantum Simulation
Mauro E. S. Morales, Pedro C. S. Costa, Giacomo Pantaleoni +3 more·Oct 28, 2022
Abstract Quantum algorithms for simulation of Hamiltonian evolution are often based on product formulae. The fractal methods give a systematic way to find arbitrarily high-order product formulae, but result in a large number of exponentials. On the o...
Classification of Hybrid Quantum-Classical Computing
F. Phillipson, N. Neumann, R. Wezeman·Oct 27, 2022
As quantum computers mature, the applicability in practice becomes more important. Many uses of quantum computers will be hybrid, with classical computers still playing an important role in operating and using the quantum computer. The term hybrid is...
Robust cryogenic matched low-pass coaxial filters for quantum computing applications
A. Samoylov, A. Ivanov, V. Echeistov +5 more·Oct 27, 2022
Electromagnetic noise is one of the key external factors decreasing superconducting qubits coherence. Matched coaxial filters can prevent microwave and IR photons negative influence on superconducting quantum circuits. Here, we report on design and f...
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...
Automated error correction in superdense coding, with implementation on superconducting quantum computer
K. Nilesh, P. Joshi, P. Panigrahi·Oct 27, 2022
Construction of a fault-tolerant quantum computer remains a challenging problem due to unavoid-able noise in quantum states and the fragility of quantum entanglement. However, most of the error-correcting codes increases the complexity of the algorit...
Study of noise in virtual distillation circuits for quantum error mitigation
Pontus Vikstål, G. Ferrini, S. Puri·Oct 27, 2022
Virtual distillation has been proposed as an error mitigation protocol for estimating the expectation values of observables in quantum algorithms. It proceeds by creating a cyclic permutation of M noisy copies of a quantum state using a sequence of c...
Quantum security of subset cover problems
Samuel Bouaziz-Ermann, A. Grilo, Damien Vergnaud·Oct 27, 2022
The subset cover problem for $k \geq 1$ hash functions, which can be seen as an extension of the collision problem, was introduced in 2002 by Reyzin and Reyzin to analyse the security of their hash-function based signature scheme HORS. The security o...
Solving the Schrodinger equation with genetic algorithms: a practical approach
R. Lahoz-Beltra·Oct 27, 2022
The Schrödinger equation is one of the most important equations in physics and chemistry and can be solved in the simplest cases by computer numerical methods. Since the beginning of the 1970s, the computer began to be used to solve this equation in ...
An integrated microwave-to-optics interface for scalable quantum computing
M. Weaver, P. Duivestein, A. C. Bernasconi +7 more·Oct 27, 2022
Microwave-to-optics transduction is emerging as a vital technology for scaling quantum computers and quantum networks. To establish useful entanglement links between qubit processing units, several key conditions must be simultaneously met: the trans...
Broadband SNAIL parametric amplifier with microstrip impedance transformer
D. Ezenkova, D. Moskalev, N. Smirnov +8 more·Oct 27, 2022
Josephson parametric amplifiers are an important part of a modern superconducting quantum computing platform and squeezed quantum states generation devices. Traveling wave and impedance-matched parametric amplifiers provide broad bandwidth for high-f...
Improving Josephson junction reproducibility for superconducting quantum circuits: junction area fluctuation
Anastasiya A. Pishchimova, N. Smirnov, D. Ezenkova +6 more·Oct 27, 2022
Josephson superconducting qubits and parametric amplifiers are prominent examples of superconducting quantum circuits that have shown rapid progress in recent years. As such devices become more complex, the requirements for reproducibility of their e...
Hierarchical quantum circuit representations for neural architecture search
Matt Lourens, I. Sinayskiy, D. Park +2 more·Oct 26, 2022
Quantum circuit algorithms often require architectural design choices analogous to those made in constructing neural and tensor networks. These tend to be hierarchical, modular and exhibit repeating patterns. Neural Architecture Search (NAS) attempts...
Universal robust quantum gates by geometric correspondence of noisy quantum evolution
Yong-Ju Hai, Junning Li, Junkai Zeng +2 more·Oct 26, 2022
A key to the next leap in quantum technologies and quantum computing relies on precise and robust control over noisy quantum systems. For the first time, our theory uncovers an essential correspondence between the driven noisy quantum evolution and m...
Probabilistic Prime Factorization based on Virtually Connected Boltzmann Machine and Probabilistic Annealing
Hyundo Jung, Hyunjin Kim, Woojin Lee +4 more·Oct 26, 2022
Probabilistic computing has been introduced to operate functional networks using a probabilistic bit (p-bit), generating 0 or 1 probabilistically from its electrical input. In contrast to quantum computers, probabilistic computing enables the operati...
Quantum Deep Recurrent Reinforcement Learning
Samuel Yen-Chi Chen·Oct 26, 2022
Recent advances in quantum computing (QC) and machine learning (ML) have drawn significant attention to the development of quantum machine learning (QML). Reinforcement learning (RL) is one of the ML paradigms which can be used to solve complex seque...
Variational quantum simulation of the critical Ising model with symmetry averaging
Troy J. Sewell, N. Bao, S. Jordan·Oct 26, 2022
Here, we investigate the use of deep multi-scale entanglement renormalization (DMERA) circuits as a variational ansatz for ground states of gapless systems. We use the exactly-solvable one-dimensional critical transverse-field Ising model as a testbe...
Quantum state preparation without coherent arithmetic
Sam McArdle, Andr'as Gily'en, M. Berta·Oct 26, 2022
We introduce a versatile method for preparing a quantum state whose amplitudes are given by some known function. Unlike existing approaches, our method does not require handcrafted reversible arithmetic circuits, or quantum table reads, to encode the...