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Showing 2008 · quant-phShow all

11 papers · 2 filters

quant-ph2008★ 60 cited

Manipulating sudden death of entanglement of two-qubit X-states in thermal reservoirs

Mazhar Ali, G. Alber, A. R. P. Rau

Manipulation of sudden death of entanglement (ESD) of two qubits interacting with statistically uncorrelated thermal reservoirs is investigated. It is shown that for initially prep…

quant-ph2008

Engineering Giant Nonlinearities in Quantum Nanosystems

Kurt Jacobs, Andrew Landahl

We describe a method to engineer giant nonlinearities in, and probes to measure nonlinear observables of, mesoscopic quantum resonators. This involves tailoring the Hamiltonian of…

quant-ph2008★ 47 cited

Maximal Success Probabilities of Linear-Optical Quantum Gates

Dmitry B. Uskov, Lev Kaplan, A. Matthew Smith +2

Numerical optimization is used to design linear-optical devices that implement a desired quantum gate with perfect fidelity, while maximizing the success rate. For the 2-qubit CS (…

quant-ph2008★ 31 cited

Linear-Optical Hyperentanglement-Assisted Quantum Error-Correcting Code

Mark M. Wilde, Dmitry B. Uskov

We propose a linear-optical implementation of a hyperentanglement-assisted quantum error-correcting code. The code is hyperentanglement-assisted because the shared entanglement res…

quant-ph2008★ 253 cited

Entangled Fock states for Robust Quantum Optical Metrology, Imaging, and Sensing

Sean D. Huver, Christoph F. Wildfeuer, Jonathan P. Dowling

We propose a class of path-entangled photon Fock states for robust quantum optical metrology, imaging, and sensing in the presence of loss. We model propagation loss with beam-spli…

quant-ph2008★ 38 cited

Entanglement-Seeded-Dual Optical Parametric Amplification: Applications to Quantum Communication, Imaging, and Metrology

Ryan T. Glasser, Hugo Cable, Jonathan P. Dowling +3

The study of optical parametric amplifiers (OPAs) has been successful in describing and creating nonclassical light for use in fields such as quantum metrology and quantum lithogra…

quant-ph2008★ 48 cited

Arbitrary Coherent Superpositions of Quantized Vortices in Bose-Einstein Condensates from Orbital Angular Momentum Beams of Light

Sulakshana Thanvanthri, Kishore T. Kapale, Jonathan P. Dowling

We recently proposed a scheme for the creation of coherent superpositions of vortex states in Bose-Einstein condensates (BEC) using orbital angular momentum (OAM) states of light […

quant-ph2008★ 13 cited

Sub-Shot-Noise Quantum Optical Interferometry: A Comparison of Entangled State Performance within a Unified Measurement Scheme

Yang Gao, Hwang Lee

Phase measurement using a lossless Mach-Zehnder interferometer with certain entangled -photon states can lead to a phase sensitivity of the order of 1/N, the Heisenberg limit. H…

quant-ph2008★ 48 cited

Experimental sub-Rayleigh resolution by an unseeded high-gain optical parametric amplifier for quantum lithography

Fabio Sciarrino, Chiara Vitelli, Francesco De Martini +3

Quantum lithography proposes to adopt entangled quantum states in order to increase resolution in interferometry. In the present paper we experimentally demonstrate that the output…

quant-ph2008★ 17 cited

Quantum Forbidden-Interval Theorems for Stochastic Resonance

Mark M. Wilde, Bart Kosko

We extend the classical forbidden-interval theorems for a stochastic-resonance noise benefit in a nonlinear system to a quantum-optical communication model and a continuous-variabl…

quant-ph2008★ 29 cited

Geometric phases and Bloch sphere constructions for SU(N), with a complete description of SU(4)

D. Uskov, A. R. P. Rau

A two-sphere ("Bloch" or "Poincare") is familiar for describing the dynamics of a spin-1/2 particle or light polarization. Analogous objects are derived for unitary groups larger t…