Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Operational definition of topological order
Amit Jamadagni, H. Weimer·May 13, 2020
The unrivaled robustness of topologically ordered states of matter against perturbations has immediate applications in quantum computing and quantum metrology, yet their very existence poses a challenge to our understanding of phase transitions. In p...
Conceptual Understanding through Efficient Automated Design of Quantum Optical Experiments
Mario Krenn, Jakob S. Kottmann, N. Tischler +1 more·May 13, 2020
The design of quantum experiments can be challenging for humans. This can be attributed at least in part to counterintuitive quantum phenomena such as superposition or entanglement. In experimental quantum optics, computational and artificial intelli...
Intrinsic sign problem in fermionic and bosonic chiral topological matter
O. Golan, Adam Smith, Z. Ringel·May 12, 2020
The infamous sign problem leads to an exponential complexity in Monte Carlo simulations of generic many-body quantum systems. Nevertheless, many phases of matter are known to admit a sign-problem-free representative, allowing efficient simulations on...
Towards quantum advantage via topological data analysis
Casper Gyurik, Chris Cade, V. Dunjko·May 6, 2020
Even after decades of quantum computing development, examples of generally useful quantum algorithms with exponential speedups over classical counterparts are scarce. Recent progress in quantum algorithms for linear-algebra positioned quantum machine...
Ground subspaces of topological phases of matter as error correcting codes
Yang Qiu, Zhenghan Wang·Apr 24, 2020
Topological quantum computing is believed to be inherently fault-tolerant. One mathematical justification would be to prove that ground subspaces or ground state manifolds of topological phases of matter behave as error correction codes with macrosco...
Benchmarking near-term devices with quantum error correction
James R. Wootton·Apr 23, 2020
Now that ever more sophisticated devices for quantum computing are being developed, we require ever more sophisticated benchmarks. This includes a need to determine how well these devices support the techniques required for quantum error correction. ...
Quantum ℛ-Matrices as Universal Qubit Gates
N. Kolganov, A. Morozov·Apr 16, 2020
We study the Chern-Simons approach to the topological quantum computing. We use quantum ℛ-matrices as universal quantum gates and study the approximations of some one-qubit operations. We make some modifications to the known Solovay—Kitaev algorithm ...
Cellular automaton decoders for topological quantum codes with noisy measurements and beyond
M. Vasmer, D. Browne, Aleksander Kubica·Apr 15, 2020
We propose an error correction procedure based on a cellular automaton, the sweep rule, which is applicable to a broad range of codes beyond topological quantum codes. For simplicity, however, we focus on the three-dimensional toric code on the rhomb...
Towards simulation of the dynamics of materials on quantum computers
Lindsay Bassman, Kuang Liu, A. Krishnamoorthy +8 more·Apr 9, 2020
Author(s): Bassman, Lindsay; Liu, Kuang; Krishnamoorthy, Aravind; Linker, Thomas; Geng, Yifan; Shebib, Daniel; Fukushima, Shogo; Shimojo, Fuyuki; Kalia, Rajiv K; Nakano, Aiichiro; Vashishta, Priya | Abstract: A highly anticipated application for quan...
Topological Quantum Compiling with Reinforcement Learning
Yuanhua Zhang, Peikun Zheng, Yi Zhang +1 more·Apr 9, 2020
Quantum compiling, a process that decomposes the quantum algorithm into a series of hardware-compatible commands or elementary gates, is of fundamental importance for quantum computing. We introduce an efficient algorithm based on deep reinforcement ...
Universal topological quantum computation with strongly correlated Majorana edge modes
Ye-Min Zhan, Yuge Chen, Bin Chen +3 more·Apr 7, 2020
Majorana-based quantum gates are not complete for performing universal topological quantum computation while Fibonacci-based gates are difficult to be realized electronically and hardly coincide with the conventional quantum circuit models. In refere...
Quasiparticle Poisoning of Majorana Qubits.
Torsten Karzig, W. Cole, D. Pikulin·Apr 2, 2020
Qubits based on Majorana zero modes are a promising path towards topological quantum computing. Such qubits, though, are susceptible to quasiparticle poisoning which does not have to be small by topological argument. We study the main sources of the ...
Driven Dissipative Majorana Dark Spaces.
M. Gau, R. Egger, A. Zazunov +1 more·Mar 30, 2020
Pure quantum states can be stabilized in open quantum systems subject to external driving forces and dissipation by environmental modes. We show that driven dissipative (DD) Majorana devices offer key advantages for stabilizing degenerate state manif...
Restricted Boltzmann machine representation for the groundstate and excited states of Kitaev Honeycomb model
Mohammadreza Noormandipour, Youran Sun, Babak Haghighat·Mar 16, 2020
In this work, the capability of restricted Boltzmann machines (RBMs) to find solutions for the Kitaev honeycomb model with periodic boundary conditions is investigated. The measured groundstate energy of the system is compared and, for small lattice ...
Digital Simulation of Topological Matter on Programmable Quantum Processors.
F. Mei, Qihao Guo, Ya-Fei Yu +3 more·Mar 13, 2020
Simulating the topological phases of matter in synthetic quantum simulators is a topic of considerable interest. Given the universality of digital quantum simulators, the prospect of digitally simulating exotic topological phases is greatly enhanced....
Calculating nonadiabatic couplings and Berry's phase by variational quantum eigensolvers
Shiro Tamiya, Sho Koh, Yuya O. Nakagawa·Mar 3, 2020
Investigating systems in quantum chemistry and quantum many-body physics with the variational quantum eigensolver (VQE) is one of the most promising applications of forthcoming near-term quantum computers. The VQE is a variational algorithm for findi...
Experimental deterministic correction of qubit loss
R. Stricker, D. Vodola, A. Erhard +7 more·Feb 21, 2020
The successful operation of quantum computers relies on protecting qubits from decoherence and noise, which—if uncorrected—will lead to erroneous results. Because these errors accumulate during an algorithm, correcting them is a key requirement for l...
Identification of Symmetry-Protected Topological States on Noisy Quantum Computers.
Daniel Azses, R. Haenel, Y. Naveh +3 more·Feb 11, 2020
Identifying topological properties is a major challenge because, by definition, topological states do not have a local order parameter. While a generic solution to this challenge is not available yet, a broad class of topological states, namely, symm...
Absence of logarithmic divergence of the entanglement entropies at the phase transitions of a 2D classical hard rod model
Christophe Chatelain, A. Gendiar·Jan 31, 2020
Entanglement entropy is a powerful tool to detect continuous, discontinuous and even topological phase transitions in quantum as well as classical systems. In this work, von Neumann and Renyi entanglement entropies are studied numerically for classic...
Non-Pauli topological stabilizer codes from twisted quantum doubles
J. M. D. L. Fuente, N. Tarantino, J. Eisert·Jan 30, 2020
It has long been known that long-ranged entangled topological phases can be exploited to protect quantum information against unwanted local errors. Indeed, conditions for intrinsic topological order are reminiscent of criteria for faithful quantum er...