Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Performance of the Quantum Approximate Optimization Algorithm on the Maximum Cut Problem
G. Crooks·Nov 20, 2018
The Quantum Approximate Optimization Algorithm (QAOA) is a promising approach for programming a near-term gate-based hybrid quantum computer to find good approximate solutions of hard combinatorial problems. However, little is currently know about th...
PQC: Extended Triple Decomposition Problem (XTDP) Applied To GL(d, Fp)-An Evolved Framework For Canonical Non-Commutative Cryptography
P. Hecht·Nov 20, 2018
Post-Quantum Cryptography (PQC) attempts to find cryptographic protocols resistant to attacks using Shor polynomial time algorithm for numerical field problems or Grover search algorithm. A mostly overlooked but valuable line of solutions is provided...
How quantum is the speedup in adiabatic unstructured search?
I. Hen·Nov 20, 2018
In classical computing, analog approaches have sometimes appeared to be more powerful than they really are. This occurs when resources, particularly precision, are not appropriately taken into account. While the same should also hold for analog quant...
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...
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...
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 ...
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...
Equivalence Checking of Sequential Quantum Circuits
Qisheng Wang, Riling Li, M. Ying·Nov 16, 2018
We define a formal framework for equivalence checking of sequential quantum circuits. The model we adopt is a quantum state machine, which is a natural quantum generalization of Mealy machines. A major difficulty in checking quantum circuits (but not...
Quantum Engineering of Majorana Fermions
Eric Mascot, S. Cocklin, S. Rachel +1 more·Nov 16, 2018
Chiral superconductors have the ability to host topologically protected Majorana zero modes which have been proposed as future qubits for topological quantum computing. The recently introduced magnet--superconductor hybrid (MSH) systems consisting of...
Logical Structures Underlying Quantum Computing
F. Holik, G. Sergioli, H. Freytes +1 more·Nov 16, 2018
In this work we advance a generalization of quantum computational logics capable of dealing with some important examples of quantum algorithms. We outline an algebraic axiomatization of these structures.
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...
Experimental Implementation of a Raman-Assisted Eight-Wave Mixing Process
S. Mundhada, A. Grimm, J. Venkatraman +9 more·Nov 15, 2018
Nonlinear processes in the quantum regime are essential for many applications, such as quantum-limited amplification, measurement and control of quantum systems. In particular, the field of quantum error correction relies heavily on high-order nonlin...
Memory-Efficient Quantum Circuit Simulation by Using Lossy Data Compression
Xin-Chuan Wu, S. Di, F. Cappello +3 more·Nov 14, 2018
In order to evaluate, validate, and refine the design of new quantum algorithms or quantum computers, researchers and developers need methods to assess their correctness and fidelity. This requires the capabilities of quantum circuit simulations. How...
Quantum algorithms for conformal bootstrap
N. Bao, Junyu Liu·Nov 14, 2018
With the help of recent developments in quantum algorithms for semidefinite programming, we discuss the possibility for quantum speedup for the numerical conformal bootstrap in conformal field theory. We show that quantum algorithms may have signific...
Quantum witness of a damped qubit with generalized measurements
M. Bojer, Alexander Friedenberger, E. Lutz·Nov 14, 2018
We evaluate the quantum witness based on the no-signaling-in-time condition of a damped two-level system for nonselective generalized measurements of varying strength. We explicitly compute its dependence on the measurement strength for a generic exa...
Field Induced Oscillation of Two Majorana Modes in a Quantum Ring
Yue Yu, K. Szeto·Nov 14, 2018
We calculate the topological boundary modes found for quantum wire for a quantum ring. For the symmetric ring we find analytical solutions for two quasi-particles identifiable as the Majorana states and for asymmetric ring, we have also find approxim...
Faster manipulation of large quantum circuits using wire label reference diagrams
A. Paler, A. Fowler, R. Wille·Nov 14, 2018
Abstract Large scale quantum computing is highly anticipated, and quantum circuit design automation needs to keep up with the transition from small scale to large scale problems. Methods to support fast quantum circuit manipulations (e.g. gate replac...
Can a universal quantum cloner be used to design an experimentally feasible near-deterministic CNOT gate?
A. Gueddana, P. Gholami, V. Lakshminarayanan·Nov 14, 2018
We propose a non-deterministic CNOT gate based on a quantum cloner, a quantum switch based on all optical routing of single photon by single photon, a quantum dot spin in a double-sided optical microcavity with two photonic qubits, delay lines and ot...
Holographic Renyi entropy from quantum error correction
C. Akers, Pratik Rath·Nov 13, 2018
We study Renyi entropies Sn in quantum error correcting codes and compare the answer to the cosmic brane prescription for computing S˜n≡n2∂nn−1nSn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackag...