Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Masking quantum information in multipartite scenario
Mao-Sheng Li, Yan-Ling Wang·Dec 5, 2018
Recently, Kavan Modi \emph{et al.} found that masking quantum information is impossible in bipartite scenario in [Phys. Rev. Lett. \textbf{120}, 230501 (2018)]. This adds another item of the no-go theorems. In this paper, we present some new schemes ...
Large stark tuning of InAs/InP quantum dots
S. Aghaeimeibodi, Chang-Min Lee, M. A. Buyukkaya +2 more·Dec 4, 2018
InAs/InP quantum dots are excellent sources of telecom single-photon emission and are among the most promising candidates for scalable quantum photonic circuits. However, geometric differences in each quantum dot leads to slightly different emission ...
High-Threshold Code for Modular Hardware With Asymmetric Noise
Xiaosi Xu, Qi Zhao, Xiao Yuan +1 more·Dec 4, 2018
We consider an approach to fault tolerant quantum computing based on a simple error detecting code operating as the substrate for a conventional surface code. We develop a customised decoder to process the information about the likely location of err...
Quantum Teleportation of Shared Quantum Secret.
Sang Min Lee, Seung-Woo Lee, Hyunseok Jeong +1 more·Dec 3, 2018
Quantum teleportation is a fundamental building block of quantum communications and quantum computations, transferring quantum states between distant physical entities. In the context of quantum secret sharing, the teleportation of quantum informatio...
Trading T gates for dirty qubits in state preparation and unitary synthesis
G. Low, V. Kliuchnikov, L. Schaeffer·Dec 3, 2018
Efficient synthesis of arbitrary quantum states and unitaries from a universal fault-tolerant gate-set e.g. Clifford+T is a key subroutine in quantum computation. As large quantum algorithms feature many qubits that encode coherent quantum informatio...
Nanomechanical single-photon routing
C. Papon, Xiaoyan Zhou, H. Thyrrestrup +7 more·Nov 27, 2018
The active routing of photons using rapid reconfigurable integrated circuits is a key functionality for quantum-information processing. Typical waveguide-based optical switches rely on the modulation of the refractive index, producing a modest variat...
Fast flux control of 3D transmon qubits using a magnetic hose
O. Gargiulo, S. Oleschko, J. Prat‐Camps +2 more·Nov 27, 2018
Fast magnetic flux control is a crucial ingredient for circuit quantum electrodynamics (cQED) systems. So far it has been a challenge to implement this technology with the high coherence 3D cQED architecture. In this paper we control the magnetic fie...
On-demand photonic entanglement synthesizer
S. Takeda, Kan Takase, A. Furusawa·Nov 26, 2018
Programmable and on-demand generation of photonic entanglement is enabled by a dynamically controlled loop-based circuit. Quantum information protocols require various types of entanglement, such as Einstein-Podolsky-Rosen, Greenberger-Horne-Zeilinge...
Nonreciprocity in a strongly coupled three-mode optomechanical circulatory system.
Cheng Shang, H. Z. Shen, X. Yi·Nov 25, 2018
In this work, we propose a scheme in three-mode optical systems to simulate a strongly coupled optomechanical system. The nonreciprocity observed in such a three-mode optomechanical circulatory system (OMCS) is explored. To be specific, we first deri...
Simulation of Matrix Product State on a Quantum Computer
A. Bhatia, M. Saggi·Nov 24, 2018
The study of tensor network theory is an important field and promises a wide range of experimental and quantum information theoretical applications. Matrix product state is the most well-known example of tensor network states, which provides an effec...
Classical realization of the quantum Deutsch algorithm
Yohan Vianna, M. R. Barros, M. Hor-Meyll·Nov 20, 2018
In the rapidly growing area of quantum information, the Deutsch algorithm is ubiquitous and, in most cases, the first one to be introduced to any student of this relatively new field of research. The reason for this historical relevance stems from th...
Nonpairwise Interactions Induced by Virtual Transitions in Four Coupled Artificial Atoms
M. Schöndorf, F. Wilhelm·Nov 19, 2018
The field of quantum information has matured and various protocols implementing a quantum computer are being pursued. Most similar to a classical computer is the circuit model. In 2007 Aharonov et al. showed the equivalence between the circuit model ...
Quantum Communication with Time-Bin Encoded Microwave Photons
P. Kurpiers, M. Pechal, B. Royer +10 more·Nov 19, 2018
Heralding techniques are useful in quantum communication to circumvent losses without resorting to error correction schemes or quantum repeaters. Such techniques are realized, for example, by monitoring for photon loss at the receiving end of the qua...
Optimal quantum subtracting machine
Farzad Kianvash, Marco Fanizza, V. Giovannetti·Nov 17, 2018
The impossibility of undoing a mixing process is analyzed in the context of quantum information theory. The optimal machine to undo the mixing process is studied in the case of pure states, focusing on qubit systems. Exploiting the symmetry of the pr...
On-Chip Scalable Coupled Single Photon Emitter- All Dielectric Multifunctional Quantum Optical Circuits Working on a Single Collective Mie Resonance
Swarnabha Chattaraj, Jiefei Zhang, Siyuan Lu +1 more·Nov 16, 2018
We present finite element method based simulation results for on-chip controlled photon interference in optical networks based upon interconnected arrays of primitives comprising a single photon source (SPS) embedded in lithographically fabricable re...
Universal quantum computation in the surface code using non-Abelian islands
K. Laubscher, D. Loss, James R. Wootton·Nov 16, 2018
The surface code is currently the primary proposed method for performing quantum error correction. However, despite its many advantages, it has no native method to fault-tolerantly apply non-Clifford gates. Additional techniques are therefore require...
Quantum causal influence
Jordan S. Cotler, Xizhi Han, X. Qi +1 more·Nov 13, 2018
A bstractWe introduce a framework to study the emergence of time and causal structure in quantum many-body systems. In doing so, we consider quantum states which encode spacetime dynamics, and develop information theoretic tools to extract the causal...
Geometric formalism for constructing arbitrary single-qubit dynamically corrected gates
Junkai Zeng, C. Yang, A. Dzurak +1 more·Nov 12, 2018
Implementing high-fidelity quantum control and reducing the effect of the coupling between a quantum system and its environment is a major challenge in developing quantum information technologies. Here, we show that there exists a geometrical structu...
Quantum information and quantum computing: an overview and some mathematical aspects.
M. Kibler·Nov 9, 2018
The aim of the present paper is twofold. First, to give the main ideas behind quantum computingand quantum information, a field based on quantum-mechanical phenomena. Therefore, a shortreview is devoted to (i) quantum bits or qubits (and more general...
An artificial neuron implemented on an actual quantum processor
F. Tacchino, C. Macchiavello, D. Gerace +1 more·Nov 6, 2018
Artificial neural networks are the heart of machine learning algorithms and artificial intelligence. Historically, the simplest implementation of an artificial neuron traces back to the classical Rosenblatt’s “perceptron”, but its long term practical...