Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,363 papers in 12 months (-8% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Autonomous coherence protection of a two-level system in a fluctuating environment
Fernando Quijandr'ia, J. Twamley·Feb 8, 2023
We re-examine a scheme generalized by [R. Finkelstein et al, Phys. Rev. X 11, 011008 (2021)], whose original purpose was to remove the effects of static Doppler broadening from an ensemble of non-interacting two-level systems (qubits). This scheme in...
Simulation of Kitaev chain using one-dimensional chain of superconducting qubits and environmental effects on topological states
Yang Zhang, Yunhui Ge, Yu-xi Liu·Feb 8, 2023
Kitaev chain is one of the important physical models for studying topological quantum states and quantum computing. We here propose an approach to simulate the one-dimensional Kitaev chain via a circuit of superconducting qubits. In our approach, all...
Multiobjective variational quantum optimization for constrained problems: an application to cash handling
Pablo Díez-Valle, J. Luis-Hita, Senaida Hernández-Santana +6 more·Feb 8, 2023
Combinatorial optimization problems are ubiquitous in industry. In addition to finding a solution with minimum cost, problems of high relevance involve a number of constraints that the solution must satisfy. Variational quantum algorithms (VQAs) have...
Measurement-Altered Ising Quantum Criticality
S. Murciano, Pablo Sala, Yue Liu +2 more·Feb 8, 2023
Quantum critical systems constitute appealing platforms for the exploration of novel measurement-induced phenomena due to their innate sensitivity to perturbations. We study the impact of measurement on paradigmatic Ising quantum critical chains usin...
Qualitative quantum simulation of resonant tunneling and localization with the shallow quantum circuits
J. L. Shen, P. Wang·Feb 7, 2023
In a circuit-based quantum computer, the computing is performed via the discrete-time evolution driven by quantum gates. Accurate simulation of continuoustime evolution requires a large number of quantum gates and therefore suffers from more noise. I...
Optimal Wire Cutting With Classical Communication
Lukas Brenner, C. Piveteau, David Sutter·Feb 7, 2023
Circuit knitting is the process of partitioning large quantum circuits into smaller subcircuits such that the result of the original circuits can be deduced by only running the subcircuits. Such techniques will be crucial for near-term and early faul...
On-the-fly Tailoring towards a Rational Ansatz Design for Digital Quantum Simulations
D. Mondal, Sonaldeep Halder, Dipa Halder +1 more·Feb 7, 2023
Recent advancements in quantum information and quantum technology has stimulated a good deal of interest in the development of quantum algorithms for energetics and properties of many-fermionic systems. While the variational quantum eigensolver is th...
Formalising and Learning a Quantum Model of Concepts
S. Tull, R. A. Shaikh, Sara Sabrina Zemljič +1 more·Feb 7, 2023
In this report we present a new modelling framework for concepts based on quantum theory, and demonstrate how the conceptual representations can be learned automatically from data. A contribution of the work is a thorough category-theoretic formalisa...
Argon-Milling-Induced Decoherence Mechanisms in Superconducting Quantum Circuits
J. Van Damme, T. Ivanov, P. Favia +12 more·Feb 7, 2023
The fabrication of superconducting circuits requires multiple deposition, etch and cleaning steps, each possibly introducing material property changes and microscopic defects. In this work, we specifically investigate the process of argon milling, a ...
Hamiltonian Extrema of an Arbitrary Flux-Biased Josephson Circuit
A. Miano, V. Joshi, G. Liu +4 more·Feb 6, 2023
Flux-biased loops including one or more Josephson junctions are ubiquitous elements in quantum information experiments based on superconducting circuits. These quantum circuits can be tuned to implement a variety of Hamiltonians, with applications ra...
Quantum Embedding Method for the Simulation of Strongly Correlated Systems on Quantum Computers
Max Rossmannek, Fabijan Pavošević, A. Rubio +1 more·Feb 6, 2023
Quantum computing has emerged as a promising platform for simulating strongly correlated systems in chemistry, for which the standard quantum chemistry methods are either qualitatively inaccurate or too expensive. However, due to the hardware limitat...
Computing the Many-Body Green’s Function with Adaptive Variational Quantum Dynamics
N. Gomes, David B. Williams-Young, W. D. de Jong·Feb 6, 2023
We present a method to compute the many-body real-time Green’s function using an adaptive variational quantum dynamics simulation approach. The real-time Green’s function involves the time evolution of a quantum state with one additional electron wit...
Virtual quantum error detection
Kento Tsubouchi, Yasunari Suzuki, Y. Tokunaga +2 more·Feb 6, 2023
Quantum error correction and quantum error detection necessitate syndrome measurements to detect errors. Performing syndrome measurements for each stabilizer generator can be a significant overhead, considering the fact that the readout fidelity in t...
Heterogeneous integration of superconducting thin films and epitaxial semiconductor heterostructures with lithium niobate
Michelle Lienhart, Michael Choquer, Emeline D. S. Nysten +5 more·Feb 6, 2023
We report on scalable heterointegration of superconducting electrodes and epitaxial semiconductor quantum dots (QDs) on strong piezoelectric and optically nonlinear lithium niobate. The implemented processes combine the sputter-deposited thin film su...
High-Threshold Codes for Neutral-Atom Qubits with Biased Erasure Errors
K. Sahay, J. Jin, J. Claes +2 more·Feb 6, 2023
The requirements for fault-tolerant quantum error correction can be simplified by leveraging structure in the noise of the underlying hardware. In this work, we identify a new type of structured noise motivated by neutral atom qubits, biased erasure ...
Low-loss interconnects for modular superconducting quantum processors
Jingjing Niu, Libo Zhang, Yang Liu +23 more·Feb 6, 2023
Low-loss superconducting aluminium cables and on-chip impedance transformers can be used to link qubit modules and create superconducting quantum computing networks with high-fidelity intermodule state transfer. Scaling is now a key challenge in supe...
From Bit-Parallelism to Quantum String Matching for Labelled Graphs
Massimo Equi, A. M. D. Griend, V. Mäkinen·Feb 6, 2023
Many problems that can be solved in quadratic time have bit-parallel speed-ups with factor $w$, where $w$ is the computer word size. A classic example is computing the edit distance of two strings of length $n$, which can be solved in $O(n^2/w)$ time...
Quantum Circuit Components for Cognitive Decision-Making
D. Widdows, J. Rani, E. Pothos·Feb 6, 2023
This paper demonstrates that some non-classical models of human decision-making can be run successfully as circuits on quantum computers. Since the 1960s, many observed cognitive behaviors have been shown to violate rules based on classical probabili...
Universal quantum computing with qubits embedded in trapped-ion qudits
Anastasiia S. Nikolaeva, E. Kiktenko, A. Fedorov·Feb 6, 2023
Recent developments in qudit-based quantum computing, in particular with trapped ions, open interesting possibilities for scaling quantum processors without increasing the number of physical information carriers. In this work, we propose a method for...
Symmetry resolved entanglement of excited states in quantum field theory. Part III. Bosonic and fermionic negativity
Luca Capizzi, Michele Mazzoni, O. Castro-Alvaredo·Feb 6, 2023
In two recent works, we studied the symmetry resolved Rényi entropies of quasi-particle excited states in quantum field theory. We found that the entropies display many model-independent features which we discussed and analytically characterised. In ...