Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,374 papers in 12 months (-8% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Error-Mitigated Quantum Routing on Noisy Devices
Wenbo Shi, R. Malaney·May 23, 2023
With sub-threshold quantum error correction on quantum hardware still out of reach, quantum error mitigation methods are currently deemed an attractive option for implementing certain applications on near-term noisy quantum devices. One such applicat...
Stabilization of discrete time-crystalline response on a superconducting quantum computer by increasing the interaction range
Andrea Solfanelli, S. Ruffo, S. Succi +1 more·May 23, 2023
The simulation of complex quantum many-body systems is a promising short-term goal of noisy intermediate-scale quantum (NISQ) devices. However, the limited connectivity of native qubits hinders the implementation of quantum algorithms that require lo...
A sequentially generated variational quantum circuit with polynomial complexity
Xiaokai Hou, Qing Li, M. Yung +4 more·May 22, 2023
Variational quantum algorithms have been a promising candidate to utilize near-term quantum devices to solve real-world problems. The powerfulness of variational quantum algorithms is ultimately determined by the expressiveness of the underlying quan...
How to Wire a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mn>1000</mml:mn></mml:math> -Qubit Trapped-Ion Quantum Computer
M. Malinowski, D. Allcock, C. Ballance·May 22, 2023
One of the most formidable challenges of scaling up quantum computers is that of control signal delivery. Today's small-scale quantum computers typically connect each qubit to one or more separate external signal sources. This approach is not scalabl...
Neural-network-designed three-qubit gates robust against charge noise and crosstalk in silicon
David W. Kanaar, J. Kestner·May 22, 2023
Spin qubits in semiconductor quantum dots are a promising platform for quantum computing, however, scaling to large systems is hampered by crosstalk and charge noise. Crosstalk here refers to the unwanted off-resonant rotation of idle qubits during t...
Deep Quantum Neural Networks are Gaussian Process
A. Rad·May 22, 2023
The overparameterization of variational quantum circuits, as a model of Quantum Neural Networks (QNN), not only improves their trainability but also serves as a method for evaluating the property of a given ansatz by investigating their kernel behavi...
On the Impossibility of General Parallel Fast-forwarding of Hamiltonian Simulation
Nai-Hui Chia, Kai-Min Chung, Yao-Ching Hsieh +3 more·May 21, 2023
Hamiltonian simulation is one of the most important problems in the field of quantum computing. There have been extended efforts on designing algorithms for faster simulation, and the evolution time $T$ for the simulation turns out to largely affect ...
Fidelity estimator, randomized benchmarking and ZNE for quantum pulses
Jinglei Cheng, Zhiding Liang, Rui-Yuan Yang +4 more·May 21, 2023
Most previous research focused on designing pulse programs without considering the performance of individual elements or the final fidelity. To evaluate the performance of quantum pulses, it is required to know the noiseless results of the pulses. Ho...
Randomized adiabatic quantum linear solver algorithm with optimal complexity scaling and detailed running costs
David Jennings, Matteo Lostaglio, Sam Pallister +2 more·May 19, 2023
Solving linear systems of equations is a fundamental problem with a wide variety of applications across many fields of science, and there is increasing effort to develop quantum linear solver algorithms. [Subaşi et al., Phys. Rev. Lett. (2019)] propo...
Quantum channel decomposition with preselection and postselection
R. Nagai, Shutaroh Kanno, Yuki Sato +1 more·May 19, 2023
The quantum channel decomposition techniques, which contain the so-called probabilistic error cancellation and gate/wire cutting, are powerful approach for simulating a hard-to-implement (or an ideal) unitary operation by concurrently executing relat...
DC: Depth Control on Quantum Classical Circuit
Movahhed Sadeghi, Soheil Khadirsharbiyani, Mostafa Eghbali Zarch +1 more·May 19, 2023
The growing prevalence of near-term intermediate-scale quantum (NISQ) systems has brought forth a heightened focus on the issue of circuit reliability. Several quantum computing activities, such as circuit design and multi-qubit mapping, are focused ...
Quantum simulations of SO(5) many-fermion systems using qudits
Marc Illa, C. Robin, M. Savage·May 19, 2023
The structure and dynamics of quantum many-body systems are the result of a delicate interplay between underlying interactions, which leads to intricate entanglement structures. Despite this apparent complexity, symmetries emerge and have long been u...
Pre-training Tensor-Train Networks Facilitates Machine Learning with Variational Quantum Circuits
Jun Qi, Chao-Han Huck Yang, Pin-Yu Chen +1 more·May 18, 2023
Data encoding remains a fundamental bottleneck in quantum machine learning, where amplitude encoding of high-dimensional classical vectors into quantum states incurs exponential cost. In this work, we propose a pre-trained tensor-train (TT) encoding ...
Noise-adapted recovery circuits for quantum error correction
Debjyoti Biswas, G. Vaidya, Prabha Mandayam·May 18, 2023
Implementing quantum error correction (QEC) protocols is a challenging task in today's era of noisy intermediate-scale quantum devices. We present quantum circuits for a universal, noise-adapted recovery map, often referred to as the Petz map, which ...
Fabrication of Al/AlOx/Al junctions with high uniformity and stability on sapphire substrates
Yu-Hong Zheng, Shuming Li, Zengqian Ding +3 more·May 18, 2023
Tantalum and aluminum on sapphire are widely used platforms for qubits of long coherent time. As quantum chips scale up, the number of Josephson junctions on sapphire increases. Thus, both the uniformity and stability of the junctions are crucial to ...
Impact of non-Markovian evolution on characterizations of quantum thermodynamics
Devvrat Tiwari, Subhashis Banerjee·May 18, 2023
Here, we study the impact of non-Markovian evolution on prominent characteristics of quantum thermodynamics such as ergotropy and power. These are benchmarked by the behavior of the quantum speed limit time. We make use of both geometric-based, parti...
Measuring Nonlocal Brane Order with Error-Corrected Quantum Gas Microscopes
Junhyeok Hur, Wonjung Lee, K. Kwon +3 more·May 17, 2023
Exotic quantum many-body states, such as Haldane and spin liquid phases, can exhibit remarkable features like fractional excitations and non-abelian statistics and offer new understandings of quantum entanglement in many-body quantum systems. These p...
An improved QFT-based quantum comparator and extended modular arithmetic using one ancilla qubit
Yewei Yuan, Chao Wang, Beilei Wang +4 more·May 16, 2023
Quantum comparators and modular arithmetic are fundamental in many quantum algorithms. Current research mainly focuses on operations between two quantum states. However, various applications, such as integer factorization, optimization, and financial...
Algorithm for evaluating distance-based entanglement measures
Y. Hu 胡, Y. Liu 刘, Jiangwei 江伟 Shang 尚·May 16, 2023
Quantifying entanglement in quantum systems is an important yet challenging task due to its NP-hard nature. In this work, we propose an efficient algorithm for evaluating distance-based entanglement measures. Our approach builds on Gilbert's algorith...
Quantum computation by spin-parity measurements with encoded spin qubits
M. Brooks, C. Tahan·May 16, 2023
Joint measurements of two-Pauli observables are a powerful tool for both the control and protection of quantum information. By following a simple recipe for measurement choices, single- and two- qubit rotations using two-Pauli parity and single qubit...