Papers
Live trends in quantum computing research, updated daily from arXiv.
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28,494
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13,591 papers in 12 months (-18% 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
Optimizing Quantum Search Using a Generalized Version of Grover's Algorithm
Austin Gilliam, Marco Pistoia, Constantin Gonciulea·May 13, 2020
Grover's Search algorithm was a breakthrough at the time it was introduced, and its underlying procedure of amplitude amplification has been a building block of many other algorithms and patterns for extracting information encoded in quantum states. ...
Realistic simulation of quantum computation using unitary and measurement channels
Ahmed Abid Moueddene, N. Khammassi, K. Bertels +1 more·May 13, 2020
The implementation and practicality of quantum algorithms hinge largely on the quality of operations within a quantum processor. Therefore, including realistic error models in quantum computing simulation platforms is crucial for testing these algori...
An Economic Model for Quantum Key-Recovery Attacks against Ideal Ciphers
B. Harsha, Jeremiah Blocki·May 12, 2020
It has been established that quantum algorithms can solve several key cryptographic problems more efficiently than classical computers. As progress continues in the field of quantum computing it is important to understand the risks they pose to deplo...
Cost-optimal single-qubit gate synthesis in the Clifford hierarchy
Gary J. Mooney, C. Hill, L. Hollenberg·May 12, 2020
For universal quantum computation, a major challenge to overcome for practical implementation is the large amount of resources required for fault-tolerant quantum information processing. An important aspect is implementing arbitrary unitary operators...
Measurement Cost of Metric-Aware Variational Quantum Algorithms
Barnaby van Straaten, Bálint Koczor·May 11, 2020
Variational quantum algorithms are promising tools for near-term quantum computers as their shallow circuits are robust to experimental imperfections. Their practical applicability, however, strongly depends on how many times their circuits need to b...
Efficient Optimization of Cutoffs in Quantum Repeater Chains
Boxi Li, T. Coopmans, David Elkouss·May 11, 2020
Quantum communication enables the implementation of tasks that are unachievable with classical resources. However, losses on the communication channel preclude the direct long-distance transmission of quantum information in many relevant scenarios. I...
Efficient Quantum Circuits for Accurate State Preparation of Smooth, Differentiable Functions
Adam Holmes, A. Y. Matsuura·May 9, 2020
Effective quantum computation relies upon making good use of the exponential information capacity of a quantum machine. A large barrier to designing quantum algorithms for execution on real quantum machines is that, in general, it is intractably diff...
Communication memento: Memoryless communication complexity
Srinivasan Arunachalam, Supartha Podder·May 8, 2020
We study the communication complexity of computing functions $F:\{0,1\}^n \times \{0,1\}^n\rightarrow \{0,1\}$ in the memoryless communication model. Here, Alice and Bob are given $x\in \{0,1\}^n$, $y\in \{0,1\}^n$ respectively and their goal is to c...
Reducing the impact of radioactivity on quantum circuits in a deep-underground facility
L. Cardani, F. Valenti, N. Casali +20 more·May 5, 2020
As quantum coherence times of superconducting circuits have increased from nanoseconds to hundreds of microseconds, they are currently one of the leading platforms for quantum information processing. However, coherence needs to further improve by ord...
Using Deep Learning to Understand and Mitigate the Qubit Noise Environment
D. Wise, J. Morton, S. Dhomkar·May 3, 2020
Understanding the spectrum of noise acting on a qubit can yield valuable information about its environment, and crucially underpins the optimization of dynamical decoupling protocols that can mitigate such noise. However, extracting accurate noise sp...
A new approach to the construction of Schur-Weyl states
Michał Kaczor, P. Jakubczyk·Apr 30, 2020
The Schur-Weyl states belong to a special class of states with a symmetry described by two Young and Weyl tableaux. Representation of physical systems in Hilbert space spanned on these states enables to extract quantum information hidden in nonlocal ...
Entanglement spread area law in gapped ground states
Anurag Anshu, A. Harrow, Mehdi Soleimanifar·Apr 30, 2020
Ground-state entanglement governs various properties of quantum many-body systems at low temperatures and is the key to understanding gapped quantum phases of matter. Here we identify a structural property of entanglement in the ground state of gappe...
Theory of Ergodic Quantum Processes
R. Movassagh, Jeffrey Schenker·Apr 29, 2020
The generic behavior of quantum systems has long been of theoretical and practical interest. Any quantum process is represented by a sequence of quantum channels. Random channels appear in a wide variety of applications, from quantum chaos to hologra...
Quantum simulation of quantum field theories as quantum chemistry
Junyu Liu, Yuan Xin·Apr 27, 2020
Conformal truncation is a powerful numerical method for solving generic strongly-coupled quantum field theories based on purely field-theoretic technics without introducing lattice regularization. We discuss possible speedups for performing those com...
Reinforcement-learning-assisted quantum optimization
Matteo M. Wauters, Emanuele Panizon, G. Mbeng +1 more·Apr 26, 2020
We propose a reinforcement learning (RL) scheme for feedback quantum control within the quan-tum approximate optimization algorithm (QAOA). QAOA requires a variational minimization for states constructed by applying a sequence of unitary operators, d...
Using Quantum Metrological Bounds in Quantum Error Correction: A Simple Proof of the Approximate Eastin-Knill Theorem.
Aleksander Kubica, R. Demkowicz-Dobrzański·Apr 24, 2020
We present a simple proof of the approximate Eastin-Knill theorem, which connects the quality of a quantum error-correcting code (QECC) with its ability to achieve a universal set of transversal logical gates. Our derivation employs powerful bounds o...
Adaptive Techniques in Practical Quantum Key Distribution
Wenyuan Wang·Apr 23, 2020
Quantum Key Distribution (QKD) can provide information-theoretically secure communications and is a strong candidate for the next generation of cryptography. However, in practice, the performance of QKD is limited by "practical imperfections" in real...
Fast optimization of parametrized quantum optical circuits
F. Miatto, N. Quesada·Apr 23, 2020
Parametrized quantum optical circuits are a class of quantum circuits in which the carriers of quantum information are photons and the gates are optical transformations. Optimizing these circuits is challenging due to the infinite dimensionality of t...
Protecting a bosonic qubit with autonomous quantum error correction
Jeffrey M. Gertler, Brian Baker, Juliang Li +3 more·Apr 20, 2020
To build a universal quantum computer from fragile physical qubits, effective implementation of quantum error correction (QEC)1 is an essential requirement and a central challenge. Existing demonstrations of QEC are based on an active schedule of err...
Experimental simulation of the parity-time symmetric dynamics using photonic qubits
Wei-Chao Gao, Chao Zheng, Lu Liu +2 more·Apr 19, 2020
The concept of parity-time (PT) symmetry originates from the framework of quantum mechanics, where if the Hamiltonian operator satisfies the commutation relation with the parity and time operators, it shows all real eigen-energy spectrum. Recently, P...