3.7k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- ARC Centre of Excellence for Engineered Quantum SystemsAU357 papers
- Centre National de la Recherche ScientifiqueFR333 papers
- Australian National UniversityAU332 papers
- University College LondonGB296 papers
- University of MichiganUS282 papers
- Australian Astronomical ObservatoryAU271 papers
- University of PortsmouthGB270 papers
- Institució Catalana de Recerca i Estudis AvançatsES269 papers
- Fermi National Accelerator LaboratoryUS266 papers
- Ludwig-Maximilians-Universität MünchenDE258 papers
- Institute for High Energy PhysicsES252 papers
- Centro de Investigaciones Energéticas, Medioambientales y TecnológicasES250 papers
44 papers · 2 filters
A quantum algorithm for obtaining the lowest eigenstate of a Hamiltonian assisted with an ancillary qubit system
Jeongho Bang, Seung-Woo Lee, Chang-Woo Lee +1
We propose a quantum algorithm to obtain the lowest eigenstate of any Hamiltonian simulated by a quantum computer. The proposed algorithm begins with an arbitrary initial state of…
Cool for Cats
M. J. Everitt, T. P. Spiller, G. J. Milburn +2
The iconic Schrödinger's cat state describes a system that may be in a superposition of two macroscopically distinct states, for example two clearly separated oscillator coherent s…
Photonic Boson Sampling in a Tunable Circuit
Matthew A. Broome, Alessandro Fedrizzi, Saleh Rahimi-Keshari +4
Quantum computers are unnecessary for exponentially-efficient computation or simulation if the Extended Church-Turing thesis---a foundational tenet of computer science---is correct…
Testing genuine multipartite nonlocality in phase space
Seung-Woo Lee, Mauro Paternostro, Jinhyoung Lee +1
We demonstrate genuine three-mode nonlocality based on phase space formalism. A Svetlichny-type Bell inequality is formulated in terms of the -parameterized quasiprobability fun…
Non-deterministic noiseless amplification via non-symplectic phase space transformations
Nathan Walk, Austin P. Lund, Timothy C. Ralph
We analyse the action of an ideal noiseless linear amplifier operator, $g^\hat{n}$, using the Wigner function phase space representation. In this setting we are able to clarify the…
Quantum tele-amplification with a continuous variable superposition state
Jonas S. Neergaard-Nielsen, Yujiro Eto, Chang-Woo Lee +2
Optical coherent states are classical light fields with high purity, and are essential carriers of information in optical networks. If these states could be controlled in the quant…
Correlations of entangled quantum states cannot be classically simulated
Denis Rosset, Cyril Branciard, Nicolas Gisin +1
Simulation tasks are insightful tools to compare information-theoretic resources. Considering a generalization of usual Bell scenarios where external quantum inputs are provided to…
Probing Planckian physics in de Sitter space with quantum correlations
Jun Feng, Yao-Zhong Zhang, Mark D. Gould +3
We study the quantum correlation and quantum communication channel of both free scalar and fermionic fields in de Sitter space, while the Planckian modification presented by the ch…
Breakdown of the cross-Kerr scheme for Photon Counting
Bixuan Fan, Anton F. Kockum, Joshua Combes +6
We show, in the context of single photon detection, that an atomic three-level model for a transmon in a transmission line does not support the predictions of the nonlinear polaris…
Quantum state preparation of a mechanical resonator using an optomechanical geometric phase
K. E. Khosla, M. R. Vanner, W. P. Bowen +1
We demonstrate that a geometric phase, generated via a sequence of four optomechanical interactions, can be used to increase, or generate nonlinearities in the unitary evolution of…
Notes on teleportation in an expanding space
Jun Feng, Wen-Li Yang, Yao-Zhong Zhang +1
We investigate the quantum teleportation between a conformal detector Alice and an inertial detector Bob in de Sitter space in two schemes, (i) one uses free scalar modes and (ii)…
Measurement-Device-Independent Entanglement Witnesses for All Entangled Quantum States
Cyril Branciard, Denis Rosset, Yeong-Cherng Liang +1
The problem of demonstrating entanglement is central to quantum information processing applications. Resorting to standard entanglement witnesses requires one to perfectly trust th…
Direct characterization of linear-optical networks
Saleh Rahimi-Keshari, Matthew A. Broome, Robert Fickler +3
We introduce an efficient method for fully characterizing multimode linear-optical networks. Our approach requires only a standard laser source and intensity measurements to direct…
Quantum-enhanced optical phase tracking
Hidehiro Yonezawa, Daisuke Nakane, Trevor A. Wheatley +10
Tracking a randomly varying optical phase is a key task in metrology, with applications in optical communication. The best precision for optical phase tracking has till now been li…
Long range failure-tolerant entanglement distribution
Ying Li, Sean D. Barrett, Thomas M. Stace +1
We introduce a protocol to distribute entanglement between remote parties. Our protocol is based on a chain of repeater stations, and exploits topological encoding to tolerate very…
Multi-photon quantum interference in a multi-port integrated photonic device
Benjamin J. Metcalf, Nicholas Thomas-Peter, Justin B. Spring +11
Increasing the complexity of quantum photonic devices is essential for many optical information processing applications to reach a regime beyond what can be classically simulated,…
Processing quantum information with relativistic motion of atoms
Eduardo Martin-Martinez, David Aasen, Achim Kempf
We show that particle detectors, such as 2-level atoms, in non-inertial motion (or in gravitational fields) could be used to build quantum gates for the processing of quantum infor…
Verification of quantum discord
Saleh Rahimi-Keshari, Carlton M. Caves, Timothy C. Ralph
We introduce a measurement-based method for verifying quantum discord of any bipartite quantum system. We show that by performing an informationally complete POVM (IC-POVM) on one…
Heralded Noiseless Amplification of a Photon Polarization Qubit
S. Kocsis, G. Y. Xiang, T. C. Ralph +1
Non-deterministic noiseless amplification of a single mode can circumvent the unique challenges to amplifying a quantum signal, such as the no-cloning theorem, and the minimum nois…
Quantum limits on phase-preserving linear amplifiers
Carlton M. Caves, Joshua Combes, Zhang Jiang +1
The purpose of a phase-preserving linear amplifier is to make a small signal larger, regardless of its phase, so that it can be perceived by instruments incapable of resolving the…
Quantum state cloning in the presence of a closed timelike curve
D. Ahn, C. R. Myers, T. C. Ralph +1
The possible existence of closed timelike curves (CTCs) draws attention to fundamental questions about what is physically possible and what is not. An example is the "no cloning th…
Giant Cross Kerr Effect for Propagating Microwaves Induced by an Artificial Atom
Io-Chun Hoi, C. M. Wilson, Göran Johansson +4
We have investigated the cross Kerr phase shift of propagating microwave fields strongly coupled to an artificial atom. The artificial atom is a superconducting transmon qubit in a…
Dynamical windows for real-time evolution with matrix product states
Ho N. Phien, Guifré Vidal, Ian P. McCulloch
We propose the use of a dynamical window to investigate the real-time evolution of quantum many-body systems in a one-dimensional lattice. In a recent paper [H. Phien et al, arxiv:…
Infinite boundary conditions for matrix product state calculations
Ho N. Phien, Guifre Vidal, Ian P. McCulloch
We propose a formalism to study dynamical properties of a quantum many-body system in the thermodynamic limit by studying a finite system with infinite boundary conditions (IBC) wh…