Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,643 papers in 12 months (-16% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Two-dimensional $\mathbb{Z}_2$ lattice gauge theory on a near-term quantum simulator: variational quantum optimization, confinement, and topological order
Luca Lumia, Pietro Torta, G. Mbeng +4 more·Dec 22, 2021
We propose an implementation of a two-dimensional $\mathbb{Z}_2$ lattice gauge theory model on a shallow quantum circuit, involving a number of single and two-qubits gates comparable to what can be achieved with present-day and near-future technologi...
Variational quantum simulation of the imaginary-time Lyapunov control for accelerating the ground-state preparation
Yu-Cheng Chen, Yu-Qin Chen, A. Hu +2 more·Dec 22, 2021
Quantum computers have been widely speculated to offer significant advantages in obtaining the ground state of difficult Hamiltonian in chemistry and physics. In this work, we first propose a Lyapunov control-inspired strategy to accelerate the well-...
Mitigating barren plateaus with transfer-learning-inspired parameter initializations
Huan-Yu Liu, Tai-ping Sun, Yuchun Wu +2 more·Dec 21, 2021
Variational quantum algorithms (VQAs) are widely applied in the noisy intermediate-scale quantum era and are expected to demonstrate quantum advantage. However, training VQAs faces difficulties, one of which is the so-called barren plateaus (BPs) phe...
Efficient Quantum Network Communication Using Optimized Entanglement Swapping Trees
Mohammad Ghaderibaneh, Caitao Zhan, Himanshu Gupta +1 more·Dec 21, 2021
Quantum network communication is challenging, as the no-cloning theorem in the quantum regime makes many classical techniques inapplicable; in particular, the direct transmission of qubit states over long distances is infeasible due to unrecoverable ...
Improved polar-code-based efficient post-processing algorithm for quantum key distribution
Jun-bin Fang, Zhengzhong Yi, Jin Li +5 more·Dec 20, 2021
Combined with one-time pad encryption scheme, quantum key distribution guarantees the unconditional security of communication in theory. However, error correction and privacy amplification in the post-processing phase of quantum key distribution resu...
Holographic Simulation of Correlated Electrons on a Trapped-Ion Quantum Processor
Daoheng Niu, Reza Haghshenas, Yuxuan Zhang +3 more·Dec 20, 2021
We develop holographic quantum simulation techniques to prepare correlated electronic ground states in quantum matrix product state (qMPS) form, using far fewer qubits than the number of orbitals represented. Our approach starts with a holographic te...
Practical Quantum State Tomography for Gibbs states
Yotam Y. Lifshitz, Eyal Bairey, E. Arbel +3 more·Dec 20, 2021
Quantum state tomography is an essential tool for the characterization and verification of quantum states. However, as it cannot be directly applied to systems with more than a few qubits, efficient tomography of larger states on mid-sized quantum de...
TensorLy-Quantum: Quantum Machine Learning with Tensor Methods
T. Patti, Jean Kossaifi, S. Yelin +1 more·Dec 19, 2021
Simulation is essential for developing quantum hardware and algorithms. However, simulating quantum circuits on classical hardware is challenging due to the exponential scaling of quantum state space. While factorized tensors can greatly reduce this ...
Scalable Randomized Benchmarking of Quantum Computers Using Mirror Circuits.
T. Proctor, Stefan Seritan, K. Rudinger +3 more·Dec 18, 2021
The performance of quantum gates is often assessed using some form of randomized benchmarking. However, the existing methods become infeasible for more than approximately five qubits. Here we show how to use a simple and customizable class of circuit...
Optimal Model for Fewer-Qubit CNOT Gates With Rydberg Atoms
Rui Li, Shurui Li, Dongmin Yu +2 more·Dec 16, 2021
Fewer-qubit quantum logic gate, serving as a basic unit for constructing universal multiqubit gates, has been widely applied in quantum computing and quantum information. However, traditional constructions for fewer-qubit gates often utilize a multi-...
Dynamical approach to improving Majorana qubits and distinguishing them from trivial bound states
Brett Min, Bastien Fajardo, T. Pereg-Barnea +1 more·Dec 15, 2021
We study a series of dynamical protocols which involve periodically driving a quantum dot coupled to a putative nanowire hosting Majorana zero modes (MZMs) to i) reduce the hybridization between MZMs, ii) improve the coherence of the Majorana qubit w...
Spectrum of digitized QCD: Glueballs in a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>S</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1080</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> gauge theory
A. Alexandru, P. Bedaque, R. Brett +1 more·Dec 15, 2021
Quantum simulations of QCD require digitization of the infinite-dimensional gluon field. Schemes for doing this with the minimum amount of qubits are desirable. We present a practical digitization for $SU(3)$ gauge theories via its discrete subgroup ...
Practical Quantum K-Means Clustering: Performance Analysis and Applications in Energy Grid Classification
Stephen Diadamo, Corey O’Meara, G. Cortiana +1 more·Dec 15, 2021
In this work, we aim to solve a practical use-case of unsupervised clustering that has applications in predictive maintenance in the energy operations sector using quantum computers. Using only cloud access to quantum computers, we complete thorough ...
How to Simulate Quantum Measurement without Computing Marginals.
S. Bravyi, David Gosset, Yinchen Liu·Dec 15, 2021
We describe and analyze algorithms for classically simulating measurement of an n-qubit quantum state in the standard basis, that is, sampling a bit string from the probability distribution determined by the Born rule. Our algorithms reduce the sampl...
Schrödinger-Heisenberg Variational Quantum Algorithms.
Zhong-Xia Shang, Ming-Cheng Chen, Xiao Yuan +2 more·Dec 15, 2021
Recent breakthroughs have opened the possibility of intermediate-scale quantum computing with tens to hundreds of qubits, and shown the potential for solving classical challenging problems, such as in chemistry and condensed matter physics. However, ...
Speeding up Learning Quantum States through Group Equivariant Convolutional Quantum Ans{ä}tze
Han Zheng, Zimu Li, Junyu Liu +2 more·Dec 14, 2021
We develop a theoretical framework for $S_n$-equivariant convolutional quantum circuits with SU$(d)$-symmetry, building on and significantly generalizing Jordan's Permutational Quantum Computing (PQC) formalism based on Schur-Weyl duality connecting ...
3+1 Dimension Schwinger Pair Production with Quantum Computers
Bin Xu, W. Xue·Dec 13, 2021
Real-time quantum simulation of quantum field theory in (3+1)D requires large quantum computing resources. With a few-qubit quantum computer, we develop a novel algorithm and experimentally study the Schwinger effect, the electron-positron pair produ...
Post-Quantum Era in V2X Security: Convergence of Orchestration and Parallel Computation
Engin Zeydan, Yekta Turk, Berkin Aksoy +1 more·Dec 13, 2021
Along with the potential emergence of quantum computing, safety and security of new and complex communication services such as automated driving need to be redefined in the post-quantum era. To ensure reliable, continuous, and secure operation of the...
An Optimized Quantum Implementation of ISD on Scalable Quantum Resources
Andre Esser, Sergi Ramos-Calderer, E. Bellini +2 more·Dec 12, 2021
The security of code based constructions is usually assessed by Information Set Decoding (ISD) algorithms. In the quantum setting, amplitude amplification yields an asymptotic square root gain over the classical analogue. However, it is still unclear...
Coherent effects contribution to a fast gate fidelity in ion quantum computer
P. Sidorov, M. Aksenov, I. Zalivako +5 more·Dec 12, 2021
Trapped ions are one of the most promising platforms for quantum computing due to the longest qubit coherence times and the highest gate fidelities. However, scaling the number of ions (qubits) in a linear Coulomb crystal is the key difficulty on the...