Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A new coherence measure based on fidelity
C. Liu, Da-Jian Zhang, Da-Jian Zhang +3 more·Jun 24, 2017
Quantifying coherence is an essential endeavor for both quantum foundations and quantum technologies. In this paper, we put forward a quantitative measure of coherence by following the axiomatic definition of coherence measures introduced in Baumgrat...
Machine learning of frustrated classical spin models. I. Principal component analysis
Ce Wang, H. Zhai·Jun 24, 2017
This work aims at the goal whether the artificial intelligence can recognize phase transition without the prior human knowledge. If this becomes successful, it can be applied to, for instance, analyze data from quantum simulation of unsolved physical...
Exact Equivalence between Quantum Adiabatic Algorithm and Quantum Circuit Algorithm
Hongye 泓烨 Yu 余, Yuliang 宇亮 Huang 黄, Biao 飙 Wu 吴·Jun 23, 2017
We present a rigorous proof that quantum circuit algorithm can be transformed into quantum adiabatic algorithm with the exact same time complexity. This means that from a quantum circuit algorithm of L gates we can construct a quantum adiabatic algor...
Physical-depth architectural requirements for generating universal photonic cluster states
S. Morley-Short, Sara Bartolucci, Mercedes Gimeno-Segovia +3 more·Jun 22, 2017
Most leading proposals for linear-optical quantum computing (LOQC) use cluster states, which act as a universal resource for measurement-based (one-way) quantum computation. In ballistic approaches to LOQC, cluster states are generated passively from...
Adaptive recurrence quantum entanglement distillation for two-Kraus-operator channels
Liangzhong Ruan, Wenhan Dai, M. Win·Jun 22, 2017
Quantum entanglement serves as a valuable resource for many important quantum operations. A pair of entangled qubits can be shared between two agents by first preparing a maximally entangled qubit pair at one agent, and then sending one of the qubits...
Test-driving 1000 qubits
Joshua Job, Daniel A. Lidar·Jun 21, 2017
Quantum computing is no longer a nascent field. Programmable quantum annealing (QA) devices with more than 1000 qubits are commercially available. How does one know that a putative QA device is indeed quantum? How should one go about benchmarking its...
Faster search by lackadaisical quantum walk
T. G. Wong·Jun 21, 2017
In the typical model, a discrete-time coined quantum walk searching the 2D grid for a marked vertex achieves a success probability of O(1/logN)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{a...
Quantum Resource Estimates for Computing Elliptic Curve Discrete Logarithms
M. Rötteler, M. Naehrig, K. Svore +1 more·Jun 21, 2017
We give precise quantum resource estimates for Shor's algorithm to compute discrete logarithms on elliptic curves over prime fields. The estimates are derived from a simulation of a Toffoli gate network for controlled elliptic curve point addition, i...
Universal controlled-phase gate with cat-state qubits in circuit QED
Yu Zhang, Xiong Zhao, Li Yu +2 more·Jun 21, 2017
Cat-state qubits (qubits encoded with cat states) have recently drawn intensive attention due to their enhanced life times with quantum error correction. We here propose a method to implement a universal controlled-phase gate of two cat-state qubits,...
Universal Quantum Computing with Measurement-Induced Continuous-Variable Gate Sequence in a Loop-Based Architecture.
S. Takeda, A. Furusawa·Jun 20, 2017
We propose a scalable scheme for optical quantum computing using measurement-induced continuous-variable quantum gates in a loop-based architecture. Here, time-bin-encoded quantum information in a single spatial mode is deterministically processed in...
An advanced active quenching circuit for ultra-fast quantum cryptography
M. Stipčević, B. Christensen, P. Kwiat +1 more·Jun 20, 2017
Commercial photon-counting modules based on actively quenched solid-state avalanche photodiode sensors are used in a wide variety of applications. Manufacturers characterize their detectors by specifying a small set of parameters, such as detection e...
Proposal of a new quantum annealing schedule for studying transverse-field-based quantum versus classical annealing of the Ising model: a case study of the Ising spin glass model on the square lattice by the Monte Carlo simulation
Chiaki Yamaguchi·Jun 20, 2017
Recently, Heim, Ronnow, Isakov and Troyer [Science 348 (2015) 215] have reported that Monte Carlo simulations for the Ising spin glass model on the square lattice in the physically relevant continuous-imaginary-time limit do not show superiority of q...
Quantum Control and Quantum Tomography on Neutral Atom Qudits
H. Sosa-Martínez·Jun 20, 2017
Neutral atom systems are an appealing platform for the development and testing of quantum control and measurement techniques. This dissertation presents experimental investigations of control and measurement tools using as a testbed the 16-dimensiona...
Scalable quantum computing model in the circuit-QED lattice with circulator function
M. Kim, Jaewan Kim·Jun 19, 2017
We propose a model for a scalable quantum computing in the circuit quantum electrodynamics architecture. In the Kagome lattice of qubits, three qubits are connected to each other through a superconducting three-junction flux qubit at the vertices of ...
Adiabatic Quantum Computing for Binary Clustering
C. Bauckhage, E. Brito, K. Cvejoski +3 more·Jun 17, 2017
Quantum computing for machine learning attracts increasing attention and recent technological developments suggest that especially adiabatic quantum computing may soon be of practical interest. In this paper, we therefore consider this paradigm and d...
Millimeter-wave interconnects for microwave-frequency quantum machines
M. Pechal, A. Safavi-Naeini·Jun 16, 2017
Superconducting microwave circuits form a versatile platform for storing and manipulating quantum information. A major challenge to further scalability is to find approaches for connecting these systems over long distances and at high rates. One appr...
An argon ion beam milling process for native AlOx layers enabling coherent superconducting contacts
L. Grunhaupt, Uwe von Lupke, D. Gusenkova +8 more·Jun 16, 2017
We present an argon ion beam milling process to remove the native oxide layer forming on aluminum thin films due to their exposure to atmosphere in between lithographic steps. Our cleaning process is readily integrable with conventional fabrication o...
Effective quantum state reconstruction using compressed sensing in NMR quantum computing
J. Yang, S. Cong, X. Liu +2 more·Jun 15, 2017
The number of measurements required to reconstruct the states of quantum systems increases exponentially with the quantum system dimensions, which makes the state reconstruction of high-qubit quantum systems have a great challenge in physical quantum...
Design of Quantum Circuits for Galois Field Squaring and Exponentiation
Edgard Muñoz-Coreas, H. Thapliyal·Jun 15, 2017
This work presents an algorithm to generate depth, quantum gate and qubit optimized circuits for GF(2m) squaring in the polynomial basis. Further, to the best of our knowledge the proposed quantum squaring circuit algorithm is the only work that cons...
Fault-tolerance thresholds for the surface code with fabrication errors
J. Auger, H. Anwar, Mercedes Gimeno-Segovia +2 more·Jun 15, 2017
The construction of topological error correction codes requires the ability to fabricate a lattice of physical qubits embedded on a manifold with a non-trivial topology such that the quantum information is encoded in the global degrees of freedom (i....