Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Reducing the Depth of Quantum FLT-Based Inversion Circuit
Harashta Tatimma Larasati, D. Putranto, Rini Wisnu Wardhani +1 more·Apr 16, 2022
Works on quantum computing and cryptanalysis has increased significantly in the past few years. Various constructions of quantum arithmetic circuits, as one of the essential components in the field, has also been proposed. However, there has only bee...
Quantum Control of Hole Spin Qubits in Double Quantum Dots
D. Fernández-Fernández, Y. Ban, G. Platero·Apr 15, 2022
Hole spin qubits in semiconductor quantum dots (QDs) are promising candidates for quantum information processing due to their weak hyperfine coupling to nuclear spins, and to the strong spin-orbit coupling which allows for rapid operation time. We pr...
Ground state preparation and energy estimation on early fault-tolerant quantum computers via quantum eigenvalue transformation of unitary matrices
Yulong Dong, Lin Lin, Yu Tong·Apr 12, 2022
Under suitable assumptions, the algorithms in [Lin, Tong, Quantum 2020] can estimate the ground state energy and prepare the ground state of a quantum Hamiltonian with near-optimal query complexities. However, this is based on a block encoding input ...
Quantum Fault Trees
Gabriel San Martín Silva, Tarannom Parhizkar, E. Droguett·Apr 10, 2022
: Fault tree analysis is a technique widely used in risk and reliability analysis of complex engineering systems given its deductive nature and relatively simple interpretation. In a fault tree, events are usually represented by a binary variable tha...
Variational dynamics as a ground-state problem on a quantum computer
Stefano Barison, Filippo Vicentini, I. Cirac +1 more·Apr 7, 2022
We propose a variational quantum algorithm to study the real time dynamics of quantum systems as a ground-state problem. The method is based on the original proposal of Feynman and Kitaev to encode time into a register of auxiliary qubits. We prepare...
Robust Directional Couplers for State Manipulation in Silicon Photonic-Integrated Circuits
M. Katzman, Y. Piasetzky, Evyatar Rubin +5 more·Apr 7, 2022
Photonic integrated circuits play a central role in current and future applications such as communications, sensing, ranging, and information processing. Photonic quantum computing will also likely require an integrated optics architecture for improv...
Two-qubit gate using conditional driving for highly detuned Kerr nonlinear parametric oscillators
Hiroomi Chono, T. Kanao, Hayato Goto·Apr 7, 2022
A Kerr-nonlinear parametric oscillator (KPO) is one of the promising devices to realize qubits for universal quantum computing. The KPO can stabilize two coherent states with opposite phases, yielding a quantum superposition called a Schr\"{o}dinger ...
Demonstration of a Quantum Gate Using Electromagnetically Induced Transparency.
K. McDonnell, L. Keary, J. Pritchard·Apr 7, 2022
We demonstrate a native CNOT gate between two individually addressed neutral atoms based on electromagnetically induced transparency. This protocol utilizes the strong long-range interactions of Rydberg states to enable conditional state transfer on ...
Approximate quantum gates compilation for superconducting transmon qubits with self-navigation algorithm
Runhong He, Feng-Hua Ren, Yang-Yang Xie +2 more·Apr 6, 2022
Precise and fast qubit control is crucial when compiling quantum gates for successful implementation of quantum algorithms. However, the presence of environmental noise and the nonzero bandwidth of control pulses pose challenges for the effective con...
Optimization of Quantum Read-Only Memory Circuits
Koustubh Phalak, M. Alam, Abdullah Ash-Saki +2 more·Apr 6, 2022
Quantum computing is a rapidly expanding field with applications ranging from optimization all the way to complex machine learning tasks. Quantum memories, while lacking in practical quantum computers, have the potential to bring quantum advantage. I...
How much classical information is carried by a quantum state? An approach inspired by Kolmogorov complexity
D. Brogioli·Apr 5, 2022
In quantum mechanics, a state is an element of a Hilbert space whose dimension exponentially grows with the increase of the number of par-ticles (or qubits, in quantum computing). The vague question “is this huge Hilbert space really there?” has been...
Experimental quantum adversarial learning with programmable superconducting qubits
W. Ren, Weikang Li, Shibo Xu +21 more·Apr 4, 2022
Quantum computing promises to enhance machine learning and artificial intelligence. However, recent theoretical works show that, similar to traditional classifiers based on deep classical neural networks, quantum classifiers would suffer from adversa...
Effects of Dynamical Decoupling and Pulse-Level Optimizations on IBM Quantum Computers
Siyuan Niu, A. Todri-Sanial·Apr 4, 2022
Currently available quantum computers are prone to errors. Circuit optimization and error mitigation methods are needed to design quantum circuits to achieve better fidelity when executed on NISQ hardware. Dynamical decoupling (DD) is generally used ...
Ternary logic design in topological quantum computing
Muhammad Ilyas, Shawn X. Cui, M. Perkowski·Apr 3, 2022
A quantum computer can perform exponentially faster than its classical counterpart. It works on the principle of superposition. But due to the decoherence effect, the superposition of a quantum state gets destroyed by the interaction with the environ...
A stochastic evaluation of quantum Fisher information matrix with generic Hamiltonians
Le Bin Ho·Apr 3, 2022
Quantum Fisher information matrix (QFIM) is a fundamental quantity in quantum physics, which closely links to diverse fields such as quantum metrology, phase transitions, entanglement witness, and quantum speed limit. It is crucial in quantum paramet...
Not All SWAPs Have the Same Cost: A Case for Optimization-Aware Qubit Routing
Ji Liu, Peiyi Li, Huiyang Zhou·Apr 1, 2022
Despite rapid advances in quantum computing technologies, the qubit connectivity limitation remains to be a critical challenge. Both near-term NISQ quantum computers and relatively long-term scalable quantum architectures do not offer full connectivi...
Quantum approximate optimization algorithm for qudit systems
Yannick Deller, S. Schmitt, M. Lewenstein +5 more·Apr 1, 2022
A frequent starting point of quantum computation platforms are two-state quantum systems, i.e., qubits. However, in the context of integer optimization problems, relevant to scheduling optimization and operations research, it is often more resource-e...
Inverse design of high-dimensional quantum optical circuits in a complex medium
Suraj Goel, Saroch Leedumrongwatthanakun, N. H. Valencia +5 more·Apr 1, 2022
Programmable optical circuits are an important tool in developing quantum technologies such as transceivers for quantum communication and integrated photonic chips for quantum information processing. Maintaining precise control over every individual ...
Fully Tunable Longitudinal Spin-Photon Interactions in Si and Ge Quantum Dots.
S. Bosco, P. Scarlino, J. Klinovaja +1 more·Mar 31, 2022
Spin qubits in silicon and germanium quantum dots are promising platforms for quantum computing, but entangling spin qubits over micrometer distances remains a critical challenge. Current prototypical architectures maximize transversal interactions b...
Variational Quantum Pulse Learning
Zhiding Liang, Hanrui Wang, Jinglei Cheng +6 more·Mar 31, 2022
Quantum computing is among the most promising emerging techniques to solve problems that are computationally intractable on classical hardware. A large body of existing works focus on using variational quantum algorithms on the gate level for machine...