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02.40.+d Interaction with environment

Power laws in the dynamic hysteresis of quantum nonlinear photonic resonators

Mon, 2016-06-13 21:15 - Oliver Marty
Date: 
2016-03-10
Author(s): 

W. Casteels, F. Storme, A. Le Boité, and C. Ciuti

Reference: 

Phys. Rev. A 93, 033824 (2016)

URL: 

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.033824

We explore theoretically the physics of dynamic hysteresis for driven-dissipative nonlinear photonic resonators.

Truncated correlation hierarchy schemes for driven-dissipative multimode quantum systems

Mon, 2016-06-13 21:12 - Oliver Marty
Date: 
2016-05-03
Author(s): 

Wim Casteels, Stefano Finazzi, Alexandre Le Boité, Florent Storme, Cristiano Ciuti

Reference: 

arXiv:1605.00882

URL: 

http://arxiv.org/abs/1605.00882

We present a method to describe driven-dissipative multi-mode systems by considering a truncated hierarchy of equations for the correlation functions.

All-optical non-Markovian stroboscopic quantum simulator

Mon, 2016-05-30 22:48 - Davide Rossini
Date: 
2015-01-30
Author(s): 

Jiasen Jin, Vittorio Giovannetti, Rosario Fazio, Fabio Sciarrino, Paolo Mataloni, Andrea Crespi, and Roberto Osellame

Reference: 

Phys. Rev. A 91, 012122 (2015)

URL: 

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.91.012122

An all-optical scheme for simulating non-Markovian evolution of a quantum system is proposed. It uses only linear optics elements and by controlling the system parameters allows one to control the presence or absence of information backflow from the environment. A sufficient and necessary condition for the non-Markovianity of our channel based on Gaussian inputs is proved. Various criteria for detecting non-Markovianity are also investigated by checking the dynamical evolution of the channel.

Observation of non-Markovian micro-mechanical Brownian motion

Thu, 2014-10-23 15:12 - Martin Kliesch
Date: 
2015-05-29
Author(s): 

S. Groeblacher, A. Trubarov, N. Prigge, M. Aspelmeyer, J. Eisert

Reference: 

Nature Communications 6, 7606 (2015)
arXiv:1305.6942

URL: 

http://arxiv.org/abs/1305.6942

Realistic and verifiable coherent control of excitonic states in a light harvesting complex

Mon, 2013-12-16 15:57 - Mattia Giardini
Date: 
2013-07-19
Author(s): 

Filippo Caruso, Simone Montangero, Mohan Sarovar, Tommaso Calarco, Martin B. Plenio, K. Birgitta Whaley,
Stephan Hoyer

Reference: 

arXiv:1307.4807v1

URL: 

http://arxiv.org/pdf/1307.4807v1.pdf

We explore the feasibility of coherent control of excitonic dynamics in light harvesting complexes despite the open nature of these quantum systems. We establish feasible targets for phase and phase/amplitude control of the electronically excited state populations in the Fenna-Mathews-Olson (FMO) complex and analyze the robustness of this control.

Detecting nonlocality of noisy multipartite states with the CHSH inequality

Thu, 2013-12-05 13:03 - Daniel Cavalcanti
Date: 
2014-04-14
Author(s): 

Rafael Chaves, Antonio Acín, Leandro Aolita, Daniel Cavalcanti

Reference: 

Phys. Rev. A 89, 042106 (2014)

URL: 

http://arxiv.org/abs/1311.4678

The Clauser-Horne-Shimony-Holt inequality was originally proposed as a Bell inequality to detect nonlocality in bipartite systems. However, it can also be used to certify the nonlocality of multipartite quantum states. We apply this to study the nonlocality of multipartite Greenberger-Horne-Zeilinger, W and graph states under local decoherence processes.

Design and stability of discrete-time quantum filters with measurement imperfections

Thu, 2013-04-25 15:07 - Mattia Giardini
Date: 
2012-06-29
Author(s): 

A. Somaraju, I. Dotsenko, C. Sayrin, P. Rouchon

Reference: 

American Control Conference (ACC), 2012
ISSN : 0743-1619
E-ISBN : 978-1-4673-2102-0
Print ISBN: 978-1-4577-1095-7
INSPEC Accession Number: 13036409

URL: 

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6315442&tag=1

This work considers the theory underlying a discrete-time quantum filter recently used in a quantum feedback experiment. It proves that this filter taking into account decoherence and measurement errors is optimal and stable.

Quantum feedback experiments stabilizing Fock states of light in a cavity

Thu, 2013-04-25 14:57 - Mattia Giardini
Date: 
2013-04-18
Author(s): 

B. Peaudecerf, C. Sayrin, X. Zhou, T. Rybarczyk, S. Gleyzes, I. Dotsenko, J.M. Raimond, M. Brune, S. Haroche

Reference: 

URL: http://link.aps.org/doi/10.1103/PhysRevA.87.042320
DOI: 10.1103/PhysRevA.87.042320
PACS: 03.67.Pp, 42.50.Pq, 42.50.Dv

The ubiquitous decoherence phenomenon is responsible for the lack of quantum superpositions at the macroscopic scale. It is increasingly difficult to isolate a quantum system from its environment when its size increases. Making use of the weird quantum properties of mesoscopic quantum states thus requires efficient means to combat decoherence. One option is real-time quantum feedback.

Field locked to a Fock state by quantum feedback with single photon corrections

Thu, 2013-04-25 14:49 - Mattia Giardini
Date: 
2012-06-15
Author(s): 

X. Zhou, I. Dotsenko, B. Peuadecerf, T. Rybarczyk, C. Sayrin, S. Gleyzes, J.M. Raimond, M. Brune, S. Haroche

Reference: 

URL: http://link.aps.org/doi/10.1103/PhysRevLett.108.243602
DOI: 10.1103/PhysRevLett.108.243602
PACS: 42.50.Pq, 03.67.Pp, 42.50.Dv

Fock states with photon numbers n up

Stabilization of nonclassical states of one- and two-mode radiation fields by reservoir engineering

Thu, 2013-04-25 14:06 - Mattia Giardini
Date: 
2012-07-23
Author(s): 

A. Sarlette, Z. Leghtas, M. Brune, J.M. Raimond, P. Rouchon

Reference: 

URL: http://link.aps.org/doi/10.1103/PhysRevA.86.012114
DOI: 10.1103/PhysRevA.86.012114
PACS: 03.65.Yz, 42.50.Pq, 03.67.Pp

We analyze a quantum reservoir engineering method, originally introduced by Sarlette et al.

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