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Showing 2014 · quant-phShow all

30 papers · 2 filters

quant-ph2014★ 44 cited

Heat transport in harmonic oscillator systems with correlated baths: Application to optomechanical arrays

André Xuereb, Alberto Imparato, Aurélien Dantan

We investigate the transport of phonons between harmonic oscillators in contact with independent thermal baths and coupled to a common oscillator, and derive an expression for…

quant-ph2014★ 4 cited

Femtosecond wavepacket interferometry using the rotational dynamics of a trapped cold molecular ion

J. Martin Berglund, Michael Drewsen, Christiane P. Koch

A Ramsey-type interferometer is suggested, employing a cold trapped ion and two time-delayed off-resonant femtosecond laser pulses. The laser light couples to the molecular polariz…

quant-ph2014★ 17 cited

Parameter estimation by multi-channel photon counting

Alexander Holm Kiilerich, Klaus Mølmer

The physical parameters governing the dynamics of a light emitting quantum system can be estimated from the photon counting signal. The information available in the full detection…

quant-ph2014★ 26 cited

Analytic solutions of topologically disjoint systems

J. R. Armstrong, A. G. Volosniev, D. V. Fedorov +2

We describe a procedure to solve an up to problem where the particles are separated topologically in groups with at most two particles in each. Arbitrary interactions are…

quant-ph2014★ 87 cited

A Statistical Benchmark for BosonSampling

Mattia Walschaers, Jack Kuipers, Juan-Diego Urbina +4

Computing the state of a quantum mechanical many-body system composed of indistinguishable particles distributed over a multitude of modes is one of the paradigmatic test cases of…

quant-ph2014★ 23 cited

Multi-frequency modes in superconducting resonators: Bridging frequency gaps in off-resonant couplings

Christian Kraglund Andersen, Klaus Mølmer

A Superconducting Quantum Interference Device (SQUID) inserted in a superconducting waveguide resonator imposes current and voltage boundary conditions that makes it suitable as a…

quant-ph2014★ 140 cited

Sampling of partially distinguishable bosons and the relation to the multidimensional permanent

Malte C. Tichy

The collective interference of partially distinguishable bosons in multi-mode networks is studied via double-sided Feynman diagrams. The probability for many-body scattering events…

quant-ph2014★ 44 cited

Thermal transport in out of equilibrium quantum harmonic chains

F. Nicacio, A. Ferraro, A. Imparato +2

We address the problem of heat transport in a chain of coupled quantum harmonic oscillators, exposed to the influences of local environments of various nature, stressing the effect…

quant-ph2014★ 79 cited

Time-dependent generalized-active-space configuration-interaction approach to photoionization dynamics of atoms and molecules

Sebastian Bauch, Lasse Kragh Sørensen, Lars Bojer Madsen

We present a wave-function based method to solve the time-dependent many-electron Schrödinger equation (TDSE) with special emphasis on strong-field ionization phenomena. The theory…

quant-ph2014★ 12 cited

Double-Fock Superposition Interferometry for Differential Diagnosis of Decoherence

Malte C. Tichy, Young-Sik Ra, Hyang-Tag Lim +3

Interferometric signals are degraded by decoherence, which encompasses dephasing, mixing and any distinguishing which-path information. These three paradigmatic processes are funda…

quant-ph2014★ 3 cited

Comment on "Contextuality in Bosonic Bunching"

Malte C. Tichy, Christian Kraglund Andersen

Bosonic bunching occurs within quantum physics and can be mimicked classically by noncontextual hidden-variable models, which excludes this phenomenon as a means to prove stronger-…

quant-ph2014★ 5 cited

Detecting non-Markovianity from continuous monitoring

Kimmo Luoma, Pinja Haikka, Jyrki Piilo

We study how non-Markovianity of an open two-level system can be detected when continuously monitoring a part of its bosonic environment. Considering a physical scenario of an atom…

quant-ph2014★ 4 cited

Past quantum state analysis of the photon number evolution in a cavity

Théo Rybarczyk, Stefan Gerlich, Bruno Peaudecerf +8

A quantum system can be monitored through repeated interactions with meters, followed by their detection. The state of the system at time t is thus conditioned on the information o…

quant-ph2014★ 102 cited

Prediction and retrodiction for a continuously monitored superconducting qubit

D. Tan, S. Weber, I. Siddiqi +2

The quantum state of a superconducting transmon qubit inside a three-dimensional cavity is monitored by reflection of a microwave field on the cavity. The information inferred from…

quant-ph2014★ 35 cited

Entanglement and the Born-Oppenheimer approximation in an exactly solvable quantum many-body system

P. A. Bouvrie, A. P. Majtey, M. C. Tichy +2

We investigate the correlations between different bipartitions of an exactly solvable one-dimensional many-body Moshinsky model consisting of Nn "nuclei" and Ne "electrons". We stu…

quant-ph2014★ 19 cited

Hypothesis testing with open quantum systems

Klaus Molmer

Using a quantum circuit model we derive the maximal ability to distinguish which of several candidate Hamiltonians describe an open quantum system. This theory, in particular, prov…

quant-ph2014★ 154 cited

Adiabatic tracking of quantum many-body dynamics

Hamed Saberi, Tomáš Opatrný, Klaus Mølmer +1

The nonadiabatic dynamics of a many-body system driven through a quantum critical point can be controlled using counterdiabatic driving, where the formation of excitations is suppr…

quant-ph2014★ 5 cited

Comment on "Non-monotonic projection probabilities as a function of distinguishability"

Young-Sik Ra, Malte C. Tichy, Hyang-Tag Lim +4

A recent work (2014 New J. Phys. 16 013006) claims that nonmonotonic structures found in the many-particle quantum-to-classical transition (2013 Proc. Natl Acad. Sci. USA 110 1227-…

quant-ph2014

Deterministic entanglement of Rydberg ensembles by engineered dissipation

D. D. Bhaktavatsala Rao, Klaus Mølmer

We propose a scheme that employs dissipation to deterministically generate entanglement in an ensemble of strongly interacting Rydberg atoms. With a combination of microwave drivin…

quant-ph2014★ 29 cited

Hybrid cavity mechanics with doped systems

Aurelien Dantan, Bhagya Nair, Guido Pupillo +1

We investigate the dynamics of a mechanical resonator in which is embedded an ensemble of two-level systems interacting with an optical cavity field. We show that this hybrid appro…

quant-ph2014★ 86 cited

Time-dependent restricted-active-space self-consistent-field theory for laser-driven many-electron dynamics. II. Extended formulation and numerical analysis

Haruhide Miyagi, Lars Bojer Madsen

The time-dependent restricted-active-space self-consistent-field (TD-RASSCF) method is formulated based on the TD variational principle. In analogy with the configuration-interacti…

quant-ph2014★ 37 cited

Many-body state engineering using measurements and fixed unitary dynamics

Mads Kock Pedersen, Jens Jakob W. H. Sørensen, Malte C. Tichy +1

We develop a scheme to prepare a desired state or subspace in high-dimensional Hilbert-spaces using repeated applications of a single static projection operator onto the desired ta…

quant-ph2014★ 16 cited

Time limited optimal dynamics beyond the Quantum Speed Limit

Miroslav Gajdacz, Kunal K. Das, Jan Arlt +2

The quantum speed limit sets the minimum time required to transfer a quantum system completely into a given target state. At shorter times the higher operation speed has to be paid…

quant-ph2014★ 11 cited

Circuit QED flip-flop memory with all-microwave switching

Christian Kraglund Andersen, Klaus Mølmer

We present a theoretical proposal for a microwave driven circuit composed of superconducting resonators and qubits which shows a bistable behaviour, and we present a simple mechani…