Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
31,611
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65
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Research Volume
15,673 papers in 12 months (-39% vs prior quarter)
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Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Feedback-Based Quantum Optimization.
Alicia B. Magann, K. Rudinger, Matthew D. Grace +1 more·Mar 15, 2021
It is hoped that quantum computers will offer advantages over classical computers for combinatorial optimization. Here, we introduce a feedback-based strategy for quantum optimization, where the results of qubit measurements are used to constructivel...
Hardware-efficient error-correcting codes for large nuclear spins
J. Gross, Clément Godfrin, A. Blais +1 more·Mar 15, 2021
Universal quantum computers require a large network of qubits robust against errors. Recent theoretical and experimental studies on donor nuclear spins in silicon, engineered on semiconductor platforms compatible with industrial fabrication, show the...
Interleaving: Modular architectures for fault-tolerant photonic quantum computing
H. Bombin, Isaac H. Kim, D. Litinski +5 more·Mar 15, 2021
Useful fault-tolerant quantum computers require very large numbers of physical qubits. Quantum computers are often designed as arrays of static qubits executing gates and measurements. Photonic qubits require a different approach. In photonic fusion-...
FLIP: A flexible initializer for arbitrarily-sized parametrized quantum circuits
F. Sauvage, Sukin Sim, A. Kunitsa +3 more·Mar 15, 2021
When compared to fault-tolerant quantum computational strategies, variational quantum algorithms stand as one of the candidates with the potential of achieving quantum advantage for real-world applications in the near term. However, the optimization ...
Application of the Diamond Gate in Quantum Fourier Transformations and Quantum Machine Learning
E. Bahnsen, S. E. Rasmussen, N. Loft +1 more·Mar 15, 2021
As we are approaching actual application of quantum technology, it is essential to exploit the current quantum resources in the best possible way. With this in mind, it might not be beneficial to use the usual standard gate sets, inspired from classi...
Tomography of time-dependent quantum spin networks with machine learning
Chen-Di Han, Bryan Glaz, M. Haile +1 more·Mar 15, 2021
Interacting quantum Hamiltonians are fundamental to quantum computing. Data-based tomography of timeindependent quantum Hamiltonians has been achieved, but an open challenge is to ascertain the structures of time-dependent quantum Hamiltonians using ...
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...
Improving Schrödinger Equation Implementations with Gray Code for Adiabatic Quantum Computers
Chia-Cheng Chang, K. McElvain, E. Rrapaj +1 more·Mar 14, 2021
We reformulate the continuous space Schr\"odinger equation in terms of spin Hamiltonians. For the kinetic energy operator, the critical concept facilitating the reduction in model complexity is the idea of position encoding. Binary encoding of positi...
Exploiting anticommutation in Hamiltonian simulation
Qi Zhao, Xiao Yuan·Mar 14, 2021
Quantum computing can efficiently simulate Hamiltonian dynamics of many-body quantum physics, a task that is generally intractable with classical computers. The hardness lies at the ubiquitous anti-commutative relations of quantum operators, in corre...
Quantum and Randomised Algorithms for Non-linearity Estimation
Debajyoti Bera, Sapv Tharrmashastha·Mar 14, 2021
Non-linearity of a Boolean function indicates how far it is from any linear function. Despite there being several strong results about identifying a linear function and distinguishing one from a sufficiently non-linear function, we found a surprising...
Diagrammatic Differentiation for Quantum Machine Learning
Alexis Toumi, Richie Yeung, G. Felice·Mar 14, 2021
We introduce diagrammatic differentiation for tensor calculus by generalising the dual number construction from rigs to monoidal categories. Applying this to ZX diagrams, we show how to calculate diagrammatically the gradient of a linear map with res...
Generation and dynamical manipulation of polarization entangled Bell states by a silicon quantum photonic circuit
Dongning Liu, Jingyuan Zheng, Lingjie Yu +5 more·Mar 13, 2021
A silicon quantum photonic circuit was proposed and demonstrated as an integrated quantum light source for telecom band polarization entangled Bell state generation and dynamical manipulation. Biphoton states were firstly generated in four silicon wa...
Scalable and High-Fidelity Quantum Random Access Memory in Spin-Photon Networks
Kevin C. Chen, W. Dai, C. Errando-Herranz +2 more·Mar 13, 2021
A quantum random access memory (qRAM) is considered an essential computing unit to enable polynomial speedups in quantum information processing. Proposed implementations include using neutral atoms and superconducting circuits to construct a binary 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...
Quantum circuit optimization with deep reinforcement learning
T. Fosel, M. Niu, F. Marquardt +1 more·Mar 13, 2021
A central aspect for operating future quantum computers is quantum circuit optimization, i.e., the search for efficient realizations of quantum algorithms given the device capabilities. In recent years, powerful approaches have been developed which f...
Error Mitigation and Quantum-Assisted Simulation in the Error Corrected Regime.
M. Lostaglio, A. Ciani·Mar 12, 2021
A standard approach to quantum computing is based on the idea of promoting a classically simulable and fault-tolerant set of operations to a universal set by the addition of "magic" quantum states. In this context, we develop a general framework to d...
QFAST: Conflating Search and Numerical Optimization for Scalable Quantum Circuit Synthesis
Ed Younis, Koushik Sen, K. Yelick +1 more·Mar 12, 2021
We present a topology aware quantum synthesis algorithm designed to produce short circuits and to scale well in practice. The main contribution is a novel representation of circuits able to encode placement and topology using generic "gates", which a...
A hole spin qubit in a fin field-effect transistor above 4 kelvin
L. Camenzind, S. Geyer, Andreas Fuhrer +3 more·Mar 12, 2021
The greatest challenge in quantum computing is achieving scalability. Classical computing, which previously faced such issues, currently relies on silicon chips hosting billions of fin field-effect transistors. These devices are small enough for quan...
Floating Tunable Coupler for Scalable Quantum Computing Architectures
E. Sete, Angela Q. Chen, R. Manenti +2 more·Mar 12, 2021
We propose a floating tunable coupler that does not rely on direct qubit-qubit coupling capacitances to achieve the zero-coupling condition. We show that the polarity of the qubit-coupler couplings can be engineered to offset the otherwise constant q...