Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
An approach to interfacing the brain with quantum computers: practical steps and caveats
E. Miranda, S. Venkatesh, J. Martín-Guerrero +3 more·Jan 4, 2022
We report on the first proof-of-concept system demonstrating how one can control a qubit with mental activity. We developed a method to encode neural correlates of mental activity as instructions for a quantum computer. Brain signals are detected uti...
Quantum Circuit Architecture Search on a Superconducting Processor
Kehuan Linghu, Yan Qian, Ruixia Wang +14 more·Jan 4, 2022
Variational quantum algorithms (VQAs) have shown strong evidence to gain provable computational advantages in diverse fields such as finance, machine learning, and chemistry. However, the heuristic ansatz exploited in modern VQAs is incapable of bala...
Efficient Quantum Feature Extraction for CNN-based Learning
Tong Dou, Guofeng Zhang, W. Cui·Jan 4, 2022
Recent work has begun to explore the potential of parametrized quantum circuits (PQCs) as general function approximators. In this work, we propose a quantum-classical deep network structure to enhance classical CNN model discriminability. The convolu...
Qubit Assignment Using Time Reversal
E. Peters, P. Shyamsundar, A. Li +1 more·Jan 3, 2022
As the number of qubits available on noisy quantum computers grows, it will become necessary to efficiently select a subset of physical qubits to use in a quantum computation. For any given quantum program and device there are many ways to assign phy...
Digitized counterdiabatic quantum optimization
N. N. Hegade, Xi Chen, E. Solano·Jan 3, 2022
We propose digitized-counterdiabatic quantum optimization (DCQO) to achieve polynomial enhancement over adiabatic quantum optimization for the general Ising spin-glass model, which includes the whole class of combinatorial optimization problems. This...
Matrix product states with backflow correlations
Guglielmo Lami, Giuseppe Carleo, M. Collura·Jan 3, 2022
By taking inspiration from the backflow transformation for correlated systems, we introduce a novel tensor network ansatz which extend the well-established Matrix Product State representation of a quantum-many body wave function. This new structure p...
Superconformal Quantum Mechanics on a Quantum Computer
Yuan Feng, M. McGuigan, Tristen White·Jan 3, 2022
We investigate superconformal quantum mechanics (SCQM) on a quantum computer. We study the ground state of the mass deformed SCQM on a quantum computed using the Variational Quantum Eigensolver (VQE) using a one boson and one boson one fermion Hilber...
Atomic boson sampling in a Bose-Einstein-condensed gas
V. Kocharovsky, V. Kocharovsky, S. Tarasov·Jan 2, 2022
We find a universal analytic formula for a characteristic function (Fourier transform) of a joint probability distribution for the particle occupation numbers in a BEC gas and the Hafnian Master Theorem generalizing the famous Permanent Master Theore...
Algorithm and Circuit of Nesting Doubled Qubits
A. Grigoryan, S. Agaian·Jan 1, 2022
Copying the quantum states is contradictory to classical information processing since the fundamental difference between classical and quantum information is that while classical information can be copied perfectly, quantum information cannot. Howeve...
Testing matrix product states
Mehdi Soleimanifar, John Wright·Jan 1, 2022
Devising schemes for testing the amount of entanglement in quantum systems has played a crucial role in quantum computing and information theory. Here, we study the problem of testing whether an unknown state $|\psi\rangle$ is a matrix product state ...
Surrogate-based optimization for variational quantum algorithms
Ryan E Shaffer, L. Kocia, M. Sarovar·Jan 1, 2022
Variational quantum algorithms are a class of techniques intended to be used on near-term quantum computers. The goal of these algorithms is to perform large quantum computations by breaking the problem down into a large number of shallow quantum cir...
Physical publicly verifiable randomness from pulsars
J. Dawson, G. Hobbs, Yansong Gao +28 more·Jan 1, 2022
We demonstrate how radio pulsars can be used as random number generators. Specifically, we focus on publicly verifiable randomness (PVR), in which the same sequence of trusted and verifiable random numbers is obtained by multiple parties. PVR is a cr...
Robust and Efficient Hamiltonian Learning
Wenjun Yu, Jinzhao Sun, Zeyao Han +1 more·Jan 1, 2022
With the fast development of quantum technology, the sizes of both digital and analog quantum systems increase drastically. In order to have better control and understanding of the quantum hardware, an important task is to characterize the interactio...
Deterministic Grover search with a restricted oracle
Tanay Roy, Liangyu Jiang, D. Schuster·Jan 1, 2022
Grover’s quantum search algorithm provides a quadratic quantum advantage over classical algorithms across a broad class of unstructured search problems. The original protocol is probabilistic, returning the desired result with significant probability ...
Limitations of Local Quantum Algorithms on Random Max-k-XOR and Beyond
Chi-Ning Chou, P. Love, Juspreet Singh Sandhu +1 more·Jan 1, 2022
We introduce a notion of \emph{generic local algorithm} which strictly generalizes existing frameworks of local algorithms such as \emph{factors of i.i.d.} by capturing local \emph{quantum} algorithms such as the Quantum Approximate Optimization Algo...
Revocation and Reconstruction of Shared Quantum States
Prakash Mudholkar, Chiranjeevi Vanarasa, Indranil Chakrabarty +1 more·Dec 31, 2021
The problem of revocation of quantum states after sharing is interesting and we ask: Is it possible for a dealer to revoke the state once shared, before the reconstruction process? Additional resources like bell states are used to help the dealer to ...
Quantum Simulation of Hawking Radiation Using VQE Algorithm on IBM Quantum Computer
Ritu Dhaulakhandi, B. K. Behera·Dec 31, 2021
Quantum computers have an exponential speed-up advantage over classical computers. One of the most prominent utilities of quantum computers is their ability to study complex quantum systems in various fields using quantum computational algorithms. Qu...
Quantum computational study of chloride attack on chloromethane for chemical accuracy and quantum noise effects with UCCSD and k-UpCCGSD ansatzes
Hocheol Lim, Hyeon-Nae Jeon, J. Rhee +2 more·Dec 31, 2021
Quantum computing is expected to play an important role in solving the problem of huge computational costs in various applications by utilizing the collective properties of quantum states, including superposition, interference, and entanglement, to p...
Numerical simulations of noisy quantum circuits for computational chemistry
Jerimiah Wright, Meenambika Gowrishankar, Daniel Claudino +4 more·Dec 31, 2021
The opportunities afforded by near-term quantum computers to calculate the ground-state properties of small molecules depend on the structure of the computational ansatz as well as the errors induced by device noise. Here we investigate the behavior ...
Optimal control of a quantum sensor: A fast algorithm based on an analytic solution
S. Hernández-Gómez, Federico Balducci, G. Fasiolo +3 more·Dec 30, 2021
Quantum sensors can show unprecedented sensitivities, provided they are controlled in a very specific, optimal way. Here, we consider a spin sensor of time-varying fields in the presence of dephasing noise, and we show that the problem of finding the...