Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
27,881
This Month
1,306
Today
0
Research Volume
13,145 papers in 12 months (+1% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Composably secure data processing for Gaussian-modulated continuous-variable quantum key distribution
Alexander G. Mountogiannakis, Panagiotis Papanastasiou, B. Braverman +1 more·Mar 30, 2021
Continuous-variable (CV) quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties, and this is usually achieved via a Gaussian modulation of coherent states. The resulting secret ke...
Topological-Graph Dependencies and Scaling Properties of a Heuristic Qubit-Assignment Algorithm
M. Steinberg, Sebastian Feld, C. G. Almudéver +2 more·Mar 29, 2021
The qubit-mapping problem aims to assign and route qubits of a quantum circuit onto an noisy intermediate-scale quantum (NISQ) device in an optimized fashion, with respect to some cost function. Finding an optimal solution to this problem is known to...
Fisher Information in Noisy Intermediate-Scale Quantum Applications
Johannes Jakob Meyer·Mar 28, 2021
The recent advent of noisy intermediate-scale quantum devices, especially near-term quantum computers, has sparked extensive research efforts concerned with their possible applications. At the forefront of the considered approaches are variational me...
Encoding strongly-correlated many-boson wavefunctions on a photonic quantum computer: application to the attractive Bose-Hubbard model
Saad Yalouz, Bruno Senjean, F. Miatto +1 more·Mar 28, 2021
Variational quantum algorithms (VQA) are considered as some of the most promising methods to determine the properties of complex strongly correlated quantum many-body systems, especially from the perspective of devices available in the near term. In ...
Hardware Efficient Quantum Search Algorithm
Ji Liu, Huiyang Zhou·Mar 26, 2021
Quantum computing has noteworthy speedup over classical computing by taking advantage of quantum parallelism, i.e., the superposition of states. In particular, quantum search is widely used in various computationally hard problems. Grover's search al...
Rydberg quantum computation with nuclear spins in two-electron neutral atoms
Xiao-Feng Shi·Mar 25, 2021
Alkaline-earth-like (AEL) atoms with two valence electrons and a nonzero nuclear spin can be excited to Rydberg state for quantum computing. Typical AEL ground states possess no hyperfine splitting, but unfortunately a GHz-scale splitting seems neces...
Heating of a Trapped Ion Induced by Dielectric Materials.
M. Teller, D. Fioretto, P. Holz +8 more·Mar 25, 2021
Electric-field noise due to surfaces disturbs the motion of nearby trapped ions, compromising the fidelity of gate operations that are the basis for quantum computing algorithms. We present a method that predicts the effect of dielectric materials on...
Classical simulation of quantum circuits using a multiqubit Bloch vector representation of density matrices
Qunsheng Huang, C. Mendl·Mar 25, 2021
In the Bloch sphere picture, one finds the coefficients for expanding a single-qubit density operator in terms of the identity and Pauli matrices. A generalization to $n$ qubits via tensor products represents a density operator by a real vector of le...
Linear Ascending Metrological Algorithm
M. Perelshtein, N. Kirsanov, V. Zemlyanov +4 more·Mar 24, 2021
The ubiquitous presence of shot noise sets a fundamental limit to the measurement precision in classical metrology. Recent advances in quantum devices and novel quantum algorithms utilizing interference effects are opening new routes for overcoming t...
Variational quantum compiling with double Q-learning
Zhimin He, Lvzhou Li, Shenggen Zheng +2 more·Mar 22, 2021
Quantum compiling aims to construct a quantum circuit V by quantum gates drawn from a native gate alphabet, which is functionally equivalent to the target unitary U. It is a crucial stage for the running of quantum algorithms on noisy intermediate-sc...
Approximate Equivalence Checking of Noisy Quantum Circuits
Xin Hong, M. Ying, Yuan Feng +2 more·Mar 22, 2021
We study the fundamental design automation problem of equivalence checking in the NISQ (Noisy Intermediate-Scale Quantum) computing realm where quantum noise is present inevitably. The notion of approximate equivalence of (possibly noisy) quantum cir...
Quantum-enhanced radiometry via approximate quantum error correction
W. Wang, Z. Chen, X. Liu +12 more·Mar 18, 2021
Quantum sensing based on exotic quantum states is appealing for practical metrology applications and fundamental studies. However, these quantum states are vulnerable to noise and the resulting quantum enhancement is weakened in practice. Here, we ex...
Quantum Computation and Communication in Bosonic Systems
Kyungjoo Noh·Mar 17, 2021
Quantum computation and communication are important branches of quantum information science. However, noise in realistic quantum devices fundamentally limits the utility of these quantum technologies. A conventional approach towards large-scale and f...
A context-aware gate set tomography characterization of superconducting qubits
Ahmed Abid Moueddene, N. Khammassi, Sebastian Feld +1 more·Mar 17, 2021
The efficiency of Quantum Characterisation, Verification, and Validation (QCVV) protocols highly hinges on the agreement between the assumed noise model and the underlying error mechanisms. As a matter of fact, errors in Quantum Processing Units (QPU...
Analytic Filter-Function Derivatives for Quantum Optimal Control
Isabel Nha Minh Le, J. Teske, Tobias Hangleiter +2 more·Mar 16, 2021
Auto-correlated noise appears in many solid state qubit systems and hence needs to be taken into account when developing gate operations for quantum information processing. However, explicitly simulating this kind of noise is often less efficient than ...
Leveraging Randomized Compiling for the QITE Algorithm
J. Ville, A. Morvan, A. Hashim +13 more·Mar 15, 2021
The success of the current generation of Noisy Intermediate-Scale Quantum (NISQ) hardware shows that quantum hardware may be able to tackle complex problems even without error correction. One outstanding issue is that of coherent errors arising from ...
Real-Time Evolution for Ultracompact Hamiltonian Eigenstates on Quantum Hardware
Katherine Klymko, Carlos Mejuto-Zaera, Stephen J. Cotton +9 more·Mar 15, 2021
In this work we present a detailed analysis of variational quantum phase estimation (VQPE), a method based on real-time evolution for ground and excited state estimation on near-term hardware. We derive the theoretical ground on which the approach st...
Mitigating Depolarizing Noise on Quantum Computers with Noise-Estimation Circuits.
M. Urbánek, B. Nachman, V. Pascuzzi +3 more·Mar 15, 2021
A significant problem for current quantum computers is noise. While there are many distinct noise channels, the depolarizing noise model often appropriately describes average noise for large circuits involving many qubits and gates. We present a meth...
Effects of surface treatments on flux tunable transmon qubits
M. Mergenthaler, C. Müller, M. Ganzhorn +9 more·Mar 14, 2021
One of the main limitations in state-of-the art solid-state quantum processors is qubit decoherence and relaxation due to noise from adsorbates on surfaces, impurities at interfaces, and material defects. For the field to advance towards full fault-t...
A low-noise on-chip coherent microwave source
C. Yan, J. Hassel, V. Vesterinen +5 more·Mar 13, 2021
The scaling up of quantum computers operating in the microwave domain requires advanced control electronics, and the use of integrated components that operate at the temperature of the quantum devices is potentially beneficial. However, such an appro...