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Non-classical correlations between single photons and phonons from a mechanical oscillator

Date: 
2016-06-03
Author(s): 

Ralf Riedinger, S. Hong et al.

Reference: 

Nature 530, 313 (2016)

Proposal to Test Bell’s Inequality in Electromechanics

Date: 
2016-06-03
Author(s): 

S. G. Hofer et al.

Reference: 

Phys. Rev. Lett. 116, 070406 (2016)

Optical hyperpolarization of 13C nuclear spins in nanodiamond ensembles

Date: 
2015-06-08 - 2015-11-18
Author(s): 

Q. Chen, I. Schwarz, F. Jelezko, A. Retzker, and M. B. Plenio

Reference: 

Phys. Rev. B 92, 184420

Dynamical nuclear polarization holds the key for orders of magnitude enhancements of nuclear magnetic resonance signals which, in turn, would enable a wide range of novel applications in biomedical sciences. However, current implementations of DNP require cryogenic temperatures and long times for achieving high polarization. Here we propose and analyze in detail protocols that can achieve rapid hyperpolarization of 13C nuclear spins in randomly oriented ensembles of nanodiamonds at room temperature.

A significant-loophole-free test of Bell's theorem with entangled photons

Date: 
2016-06-03
Author(s): 

M. Giustina, M.A.M. Versteegh, S Wengerowsky, J. Handsteiner, A. Hochrainer, K. Phelan, F. Steinlechner, J. Kofler, J.-A. Larsson, C. Abellan, W. Amaya, V. Pruneri, M.W. Mitchell, J. Beyer, T. Gerrits, A.E. Lita, L. Shalm, S.W. Nam, T. Scheidl, R. Ursin, B. Wittmann, A. Zeilinger

Reference: 

Phys. Rev. Lett. 115, 250401 (2015)

Automated Search for new Quantum Experiments

Date: 
2016-06-03
Author(s): 

M. Krenn, M. Malik, R. Fickler, R. Lapkiewicz, A. Zeilinger

Reference: 

Phys. Rev. Lett. 116, 090405 (2016)

Simulating Bosonic Baths with Error Bars

Date: 
2015-05-19 - 2015-09-22
Author(s): 

M. P. Woods, M. Cramer, and M. B. Plenio

Reference: 

Phys. Rev. Lett. 115, 130401

We derive rigorous truncation-error bounds for the spin-boson model and its generalizations to arbitrary quantum systems interacting with bosonic baths. For the numerical simulation of such baths, the truncation of both the number of modes and the local Hilbert-space dimensions is necessary. We derive superexponential Lieb-Robinson-type bounds on the error when restricting the bath to finitely many modes and show how the error introduced by truncating the local Hilbert spaces may be efficiently monitored numerically.

Proposal for High-Fidelity Quantum Simulation Using a Hybrid Dressed State

Date: 
2015-05-21 - 2015-10-16
Author(s): 

Jianming Cai, Itsik Cohen, Alex Retzker, and Martin B. Plenio

Reference: 

Phys. Rev. Lett. 115, 160504

A fundamental goal of quantum technologies concerns the exploitation of quantum coherent dynamics for the realization of novel quantum applications such as quantum computing, quantum simulation, and quantum metrology. A key challenge on the way towards these goals remains the protection of quantum coherent dynamics from environmental noise. Here, we propose a concept of a hybrid dressed state from a pair of continuously driven systems.

Two-Dimensional Spectroscopy for the Study of Ion Coulomb Crystals

Date: 
2014-06-30 - 2015-02-18
Author(s): 

A. Lemmer, C. Cormick, C. T. Schmiegelow, F. Schmidt-Kaler, and M. B. Plenio

Reference: 

Phys. Rev. Lett. 114, 073001

Ion Coulomb crystals are currently establishing themselves as a highly controllable test bed for mesoscopic systems of statistical mechanics. The detailed experimental interrogation of the dynamics of these crystals, however, remains an experimental challenge. In this work, we show how to extend the concepts of multidimensional nonlinear spectroscopy to the study of the dynamics of ion Coulomb crystals. The scheme we present can be realized with state-of-the-art technology and gives direct access to the dynamics, revealing nonlinear couplings even in the presence of thermal excitations.

Quantum Phase Transition and Universal Dynamics in the Rabi Model

Date: 
2015-03-10 - 2015-10-29
Author(s): 

Myung-Joong Hwang, Ricardo Puebla, and Martin B. Plenio

Reference: 

Phys. Rev. Lett. 115, 180404

We consider the Rabi Hamiltonian, which exhibits a quantum phase transition (QPT) despite consisting only of a single-mode cavity field and a two-level atom. We prove QPT by deriving an exact solution in the limit where the atomic transition frequency in the unit of the cavity frequency tends to infinity.

Reliable quantum certification of photonic state preparations

Date: 
2015-11-18
Author(s): 

L. Aolita, C. Gogolin, M. Kliesch, J. Eisert

Reference: 

Nature Communications 6:8498 (2015)

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