Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quasiprobabilistic Readout Correction of Midcircuit Measurements for Adaptive Feedback via Measurement Randomized Compiling
A. Hashim, Arnaud Carignan-Dugas, Larry Chen +6 more·Dec 21, 2023
Quantum measurements are a fundamental component of quantum computing. However, on present-day quantum computers, measurements can be more error prone than quantum gates and are susceptible to nonunital errors as well as nonlocal correlations due to ...
Polylogarithmic-depth controlled-NOT gates without ancilla qubits
Baptiste Claudon, Julien Zylberman, C'esar Feniou +3 more·Dec 20, 2023
Controlled operations are fundamental building blocks of quantum algorithms. Decomposing n-control-NOT gates (Cn(X)) into arbitrary single-qubit and CNOT gates, is a crucial but non-trivial task. This study introduces Cn(X) circuits outperforming pre...
Deterministic Ansätze for the measurement-based variational quantum eigensolver
Anna Schroeder, Matthias Heller, Mariami Gachechiladze·Dec 20, 2023
Measurement-based quantum computing (MBQC) is a promising approach to reducing circuit depth in noisy intermediate-scale quantum algorithms such as the variational quantum eigensolver (VQE). Unlike gate-based computing, MBQC employs local measurement...
Investigating Techniques to Optimise the Layout of Turbines in a Windfarm Using a Quantum Computer
James Hancock, Matthew J. Craven, C. McNeile +1 more·Dec 20, 2023
This paper investigates Windfarm Layout Optimization (WFLO), where we formulate turbine placement considering wake effects as a Quadratic Unconstrained Binary Optimization (QUBO) problem. Wind energy plays a critical role in the transition toward sus...
Improving fidelity of multi-qubit gates using hardware-level pulse parallelization
S. Pratapsi, Diogo Cruz·Dec 20, 2023
Quantum computation holds the promise of solving computational problems which are believed to be classically intractable. However, in practice, quantum devices are still limited by their relatively short coherence times and imperfect circuit-hardware...
First-order phase transition of the Schwinger model with a quantum computer
Takis Angelides, Pranay Naredi, Arianna Crippa +4 more·Dec 20, 2023
We explore the first-order phase transition in the lattice Schwinger model in the presence of a topological θ-term by means of the variational quantum eigensolver (VQE). Using two different fermion discretizations, Wilson and staggered fermions, we d...
Making Existing Quantum Position Verification Protocols Secure Against Arbitrary Transmission Loss
Rene Allerstorfer, Andreas Bluhm, Harry Buhrman +4 more·Dec 19, 2023
Signal loss poses a significant threat to the security of quantum cryptography when the chosen protocol lacks loss-tolerance. In quantum position verification (QPV) protocols, even relatively small loss rates can compromise security. The goal is thus...
Quantum Equation of Motion with Orbital Optimization for Computing Molecular Properties in Near-Term Quantum Computing.
Phillip W K Jensen, E. Kjellgren, Peter Reinholdt +4 more·Dec 19, 2023
Determining the properties of molecules and materials is one of the premier applications of quantum computing. A major question in the field is how to use imperfect near-term quantum computers to solve problems of practical value. Inspired by the rec...
Reassessing the advantage of indefinite causal orders for quantum metrology
Raphael Mothe, C. Branciard, A. Abbott·Dec 19, 2023
The quantum switch, the canonical example of a process with indefinite causal order, has been claimed to provide various advantages over processes with definite causal orders for some particular tasks in the field of quantum metrology. In this work, ...
Toward coherent quantum computation of scattering amplitudes with a measurement-based photonic quantum processor
R. Briceño, Robert G. Edwards, M. Eaton +3 more·Dec 19, 2023
In recent years, applications of quantum simulation have been developed to study the properties of strongly interacting theories. This has been driven by two factors: on the one hand, needs from theorists to have access to physical observables that a...
QDA2: A principled approach to automatically annotating charge stability diagrams
Brian Weber, J. P. Zwolak·Dec 18, 2023
Gate-defined semiconductor quantum dot (QD) arrays are a promising platform for quantum computing. However, presently, the large configuration spaces and inherent noise make tuning of QD devices a nontrivial task and with the increasing number of QD ...
Pauli spectrum and nonstabilizerness of typical quantum many-body states
X. Turkeshi, A. Dymarsky, P. Sierant·Dec 18, 2023
An important question of quantum information is to characterize genuinely quantum (beyond-Clifford) resources necessary for universal quantum computing. Here, we use the Pauli spectrum to quantify how magic, beyond Clifford, typical many-qubit states...
Autonomous stabilization with programmable stabilized state
Ziqian Li, Tanay Roy, Yao Lu +2 more·Dec 18, 2023
Reservoir engineering is a powerful technique to autonomously stabilize a quantum state. Traditional schemes involving multi-body states typically function for discrete entangled states. In this work, we enhance the stabilization capability to a cont...
Belief Propagation Decoding of Quantum LDPC Codes with Guided Decimation
Hanwen Yao, Waleed Abu Laban, Christian Häger +2 more·Dec 18, 2023
Quantum low-density parity-check (QLDPC) codes have emerged as a promising technique for quantum error correction. A variety of decoders have been proposed for QLDPC codes and many utilize belief propagation (BP) decoding in some fashion. However, th...
Disentangling the physics of the attractive Hubbard model as a fully interacting model of fermions via the accessible and symmetry-resolved entanglement entropies
Tong Shen, H. Barghathi, A. Del Maestro +1 more·Dec 18, 2023
The complicated ways in which electrons interact in many-body systems such as molecules and materials have long been viewed through the lens of local electron correlation and associated correlation functions. However, quantum information science has ...
Resonator-qutrit quantum battery
Fanghui Yang, Fu-Quan Dou·Dec 18, 2023
Quantum batteries (QBs) are energy storage and transfer microdevices that open up new possibilities in energy technology. Here, we derive a resonator-qutrits quantum battery (QB) model consisting of a multi-modes resonator and $N$ superconducting tra...
Challenges for Reinforcement Learning in Quantum Circuit Design
Philipp Altmann, Jonas Stein, Michael Kolle +5 more·Dec 18, 2023
Quantum computing (QC) in the current NISQ era is still limited in size and precision. Hybrid applications mitigating those shortcomings are prevalent to gain early insight and advantages. Hybrid quantum machine learning (QML) comprises both the appl...
Strategies for simulating time evolution of Hamiltonian lattice field theories
Siddharth Hariprakash, Neel S. Modi, Michael Kreshchuk +2 more·Dec 18, 2023
Simulating the time evolution of quantum field theories given some Hamiltonian $H$ requires developing algorithms for implementing the unitary operator e^{-iHt}. A variety of techniques exist that accomplish this task, with the most common technique ...
Classification and transformations of quantum circuit decompositions for permutation operations
Ankit Khandelwal, Handy Kurniawan, Shraddha Aangiras +2 more·Dec 18, 2023
Efficient decomposition of permutation unitaries is vital as they frequently appear in quantum computing. In this paper, we identify the key properties that impact the decomposition process of permutation unitaries. Then, we classify these decomposit...
Minimizing Photonic Cluster State Depth in Measurement-Based Quantum Computing
Yingheng Li, Aditya Pawar, Zewei Mo +3 more·Dec 18, 2023
Measurement-based quantum computing (MBQC) is a promising quantum computing paradigm that performs computation through ``one-way'' measurements on entangled quantum qubits. It is widely used in photonic quantum computing (PQC), where the computation ...