Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Evolutionary Reduction of the Laser Noise Impact on Quantum Gates
Tam'si Ley, A. Leonteva, Johannes Schachenmayer +1 more·Dec 27, 2023
As the size of quantum hardware progressively increases, the conjectured computational advantages of quantum technologies tend to be threatened by noise, which randomly corrupts the design of quantum logical gates. Several methods already exist to re...
Designing fast quantum gates using optimal control with a reinforcement-learning ansatz
B. Sarma, Michael J. Hartmann·Dec 26, 2023
Fast quantum gates are crucial not only for the contemporary era of noisy intermediate-scale quantum devices but also for the prospective development of practical fault-tolerant quantum computing. Leakage errors, which arise from data qubits jumping ...
Improved Qubit Routing for QAOA Circuits
Ayse Kotil, F. Šimkovic, Martin Leib·Dec 26, 2023
We develop a qubit routing algorithm with polynomial classical run time for the Quantum Approximate Optimization Algorithm (QAOA). The algorithm follows a two step process. First, it obtains a near-optimal solution, based on Vizing's theorem for the ...
Universal control of four singlet–triplet qubits
Xin Zhang, E. Morozova, M. Rimbach-Russ +9 more·Dec 26, 2023
The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and ...
Tuning Quantum Computing Privacy through Quantum Error Correction
Hui Zhong, Keyi Ju, Manojna Sistla +4 more·Dec 22, 2023
Quantum computing is a promising paradigm for efficiently solving large and high-complexity problems. However, ensuring privacy within this quantum computing necessitates innovative approaches. Existing research has introduced the concept of quantum ...
Generation of large amplitude phonon states in quantum acoustics
C. Potts, W.J.M. Franse, V.A.S.V. Bittencourt +2 more·Dec 21, 2023
The development of quantum acoustics has enabled the cooling of mechanical objects to their quantum ground state, generation of mechanical Fock-states, and Schrödinger cat states. Such demonstrations have made mechanical resonators attractive candida...
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...
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...
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...
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...
Comparing Shor and Steane error correction using the Bacon-Shor code
Shilin Huang, Kenneth R. Brown, Marko Cetina·Dec 17, 2023
Quantum states decohere through interaction with the environment. Quantum error correction can preserve coherence through active feedback wherein quantum information is encoded into a logical state with a high degree of symmetry. Perturbations are de...
Reconfigurable quantum photonic circuits based on quantum dots
Adam McCaw, Jacob Ewaniuk, B. Shastri +1 more·Dec 16, 2023
Abstract Quantum photonic integrated circuits, composed of linear-optical elements, offer an efficient way for encoding and processing quantum information on-chip. At their core, these circuits rely on reconfigurable phase shifters, typically constru...
Efficient quantum simulation of nonlinear interactions using SNAP and Rabi gates
Kimin Park, P. Marek, R. Filip·Dec 15, 2023
Quantum simulations provide means to probe challenging problems within controllable quantum systems. However, implementing or simulating deep-strong nonlinear couplings between bosonic oscillators on physical platforms remains a challenge. We present...
Optimal joint cutting of two-qubit rotation gates
Christian Ufrecht, Laura S. Herzog, Daniel D. Scherer +4 more·Dec 15, 2023
Circuit cutting, the partitioning of quantum circuits into smaller independent fragments, has become a promising avenue for scaling up current quantum-computing experiments. Here, we introduce a scheme for joint cutting of two-qubit rotation gates ba...
Accurate and gate-efficient quantum Ansätze for electronic states without adaptive optimization
Hugh G. A. Burton·Dec 15, 2023
The ability of quantum computers to overcome the exponential memory scaling of many-body problems is expected to transform quantum chemistry. Quantum algorithms require accurate representations of electronic states on a quantum device, but current ap...
Speed limits of two-qubit gates with qudits
Bora Basyildiz, Casey Jameson, Zhexuan Gong·Dec 14, 2023
The speed of elementary quantum gates ultimately sets the limit on the speed at which quantum circuits can operate. For a fixed physical interaction strength between two qubits, the speed of any two-qubit gate is limited even with arbitrarily fast si...
Utilizing Novel Quantum Counters for Grover's Algorithm to Solve the Dominating Set Problem
Jehn-Ruey Jiang, Qiao-Yi Lin·Dec 14, 2023
Grover's algorithm is a well-known unstructured quantum search algorithm run on quantum computers. It constructs an oracle and calls the oracle O($\sqrt N$) times to locate specific data out of N unsorted data. This represents a quadratic speedup com...
Block encoding of matrix product operators
Martina Nibbi, C. Mendl·Dec 14, 2023
Quantum signal processing combined with quantum eigenvalue transformation has recently emerged as a unifying framework for several quantum algorithms. In its standard form, it consists of two separate routines: block encoding, which encodes a Hamilto...