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Showing 2014 · quant-phShow all

30 papers · 2 filters

quant-ph2014★ 10 cited

Preserving photon qubits in an unknown quantum state with Knill Dynamical Decoupling - Towards an all optical quantum memory

Manish K. Gupta, Erik J. Navarro, Todd A. Moulder +5

The implementation of polarization-based quantum communication is limited by signal loss and decoherence caused by the birefringence of a single-mode fiber. We investigate the Knil…

quant-ph2014★ 186 cited

Quantum optical technologies for metrology, sensing and imaging

Jonathan P. Dowling, Kaushik P. Seshadreesan

Over the past 20 years, bright sources of entangled photons have led to a renaissance in quantum optical interferometry. Optical interferometry has been used to test the foundation…

quant-ph2014

Monotonicity of quantum relative entropy and recoverability

Mario Berta, Marius Lemm, Mark M. Wilde

The relative entropy is a principal measure of distinguishability in quantum information theory, with its most important property being that it is non-increasing with respect to no…

quant-ph2014★ 27 cited

Multipartite quantum correlations and local recoverability

Mark M. Wilde

Characterizing genuine multipartite quantum correlations in quantum physical systems has historically been a challenging problem in quantum information theory. More recently howeve…

quant-ph2014

Position and Spin Operators, Wigner Rotation and the Origin of Hidden Momentum Forces

R. F. O'Connell

Using a position operator obtained for spin 1 particles by the present author and Wigner, we obtain a quantum relativistic result for the hidden momentum force experienced by parti…

quant-ph2014★ 36 cited

Rényi squashed entanglement, discord, and relative entropy differences

Kaushik P. Seshadreesan, Mario Berta, Mark M. Wilde

In [Berta et al., J. Math. Phys. 56, 022205 (2015)], we recently proposed Renyi generalizations of the conditional quantum mutual information of a tripartite state on (with $…

quant-ph2014★ 60 cited

Fidelity of recovery, geometric squashed entanglement, and measurement recoverability

Kaushik P. Seshadreesan, Mark M. Wilde

This paper defines the fidelity of recovery of a quantum state on systems , , and as a measure of how well one can recover the full state on all three systems if system $…

quant-ph2014★ 27 cited

Three-level spin system under decoherence-minimizing driving fields: Application to nitrogen-vacancy spin dynamics

Sunil K. Mishra, L. Chotorlishvili, A. R. P. Rau +1

Within the framework of a general three-level problem, the dynamics of the nitrogen-vacancy (NV) spin is studied for the case of a special type of external driving consisting of a…

quant-ph2014★ 25 cited

Polar codes in network quantum information theory

Christoph Hirche, Ciara Morgan, Mark M. Wilde

Polar coding is a method for communication over noisy classical channels which is provably capacity-achieving and has an efficient encoding and decoding. Recently, this method has…

quant-ph2014★ 1 cited

A pair of oscillators interacting with a common heat bath

G. W. Ford, R. F. O'Connell

Here the problem considered is that of a pair of oscillators coupled to a common heat bath. Many, if not most, discussions of a single operator coupled to a bath have used the inde…

quant-ph2014★ 116 cited

Quantum brachistochrone curves as geodesics: obtaining accurate control protocols for time-optimal quantum gates

Xiaoting Wang, Michele Allegra, Kurt Jacobs +3

Most methods of optimal control cannot obtain accurate time-optimal protocols. The quantum brachistochrone equation is an exception, and has the potential to provide accurate time-…

quant-ph2014★ 13 cited

Second-order coding rates for pure-loss bosonic channels

Mark M. Wilde, Joseph M. Renes, Saikat Guha

A pure-loss bosonic channel is a simple model for communication over free-space or fiber-optic links. More generally, phase-insensitive bosonic channels model other kinds of noise,…

quant-ph2014★ 128 cited

Strong converse exponents for a quantum channel discrimination problem and quantum-feedback-assisted communication

Tom Cooney, Milán Mosonyi, Mark M. Wilde

This paper studies the difficulty of discriminating between an arbitrary quantum channel and a "replacer" channel that discards its input and replaces it with a fixed state. We sho…

quant-ph2014★ 77 cited

Bounds on Quantum Multiple-Parameter Estimation with Gaussian State

Yang Gao, Hwang Lee

We investigate the quantum Cramer-Rao bounds on the joint multiple-parameter estimation with the Gaussian state as a probe. We derive the explicit right logarithmic derivative and…

quant-ph2014★ 271 cited

Quantum feedback: theory, experiments, and applications

Jing Zhang, Yu-xi Liu, Re-Bing Wu +2

The control of individual quantum systems is now a reality in a variety of physical settings. Feedback control is an important class of control methods because of its ability to re…

quant-ph2014★ 26 cited

Comparing resolved-sideband cooling and measurement-based feedback cooling on an equal footing: analytical results in the regime of ground-state cooling

Kurt Jacobs, Hendra I. Nurdin, Frederick W. Strauch +1

We show that in the regime of ground-state cooling, simple expressions can be derived for the performance of resolved-sideband cooling --- an example of coherent feedback control -…

quant-ph2014★ 25 cited

An introduction to boson-sampling

Bryan T. Gard, Keith R. Motes, Jonathan P. Olson +2

Boson-sampling is a simplified model for quantum computing that may hold the key to implementing the first ever post-classical quantum computer. Boson-sampling is a non-universal q…

quant-ph2014★ 16 cited

Enhancement of quantum correlations between two particles under decoherence in finite temperature environment

Nasibollah Doustimotlagh, Shuhao Wang, Chenglong You +1

Enhancing the quantum correlations in realistic quantum systems interacting with the environment of finite temperature is an important subject in quantum information processing. In…

quant-ph2014★ 18 cited

Sudden change in dynamics of genuine multipartite entanglement of cavity-reservoir qubits

Mazhar Ali, A. R. P. Rau

We study the dynamics of genuine multipartite entanglement for a system of four qubits. Using a computable entanglement monotone for multipartite systems, we investigate the as yet…

quant-ph2014★ 2 cited

Optimal Estimation of a Classical Force with a Damped Oscillator in the non-Markovian Bath

Yang Gao, Hwang Lee, Yong Lei Jia

We solve the optimal quantum limit of probing a classical force exactly by a damped oscillator initially prepared in the factorized squeezed state. The memory effects of the therma…

quant-ph2014★ 48 cited

Sampling arbitrary photon-added or photon-subtracted squeezed states is in the same complexity class as boson sampling

Jonathan P. Olson, Kaushik P. Seshadreesan, Keith R. Motes +2

Boson sampling is a simple model for non-universal linear optics quantum computing using far fewer physical resources than universal schemes. An input state comprising vacuum and s…

quant-ph2014★ 68 cited

Strong converse rates for quantum communication

Marco Tomamichel, Mark M. Wilde, Andreas Winter

We revisit a fundamental open problem in quantum information theory, namely whether it is possible to transmit quantum information at a rate exceeding the channel capacity if we al…

quant-ph2014★ 20 cited

Preserving Information from the Beginning to the End of time in a Robertson-Walker Spacetime

Stefano Mancini, Roberto Pierini, Mark M. Wilde

Preserving information stored in a physical system subjected to noise can be modeled in a communication-theoretic paradigm, in which storage and retrieval correspond to an input en…

quant-ph2014★ 55 cited

On the Second-Order Asymptotics for Entanglement-Assisted Communication

Nilanjana Datta, Marco Tomamichel, Mark M. Wilde

The entanglement-assisted classical capacity of a quantum channel is known to provide the formal quantum generalization of Shannon's classical channel capacity theorem, in the sens…