%% EPIQ - Search - 2006
%% 2020-05-31
@ARTICLE{Gambetta2006,
author={ J. Gambetta, A. Blais, D.I. Schuster, A. Wallraff, L. Frunzio, J. Majer, M.H. Devoret, S.M. Girvin, R.J. Schoelkopf},
title={Qubit-photon interactions in a cavity: Measurement-induced dephasing and number splitting},
journal={Phys. Rev. A},
year={2006},
volume={74},
number={4},
pages={042318},
document_type={Article},
local-url = {Gambetta2006.pdf}}
@article{Abolfath2006636,
Abstract = {We present a theory and Coulomb and spin blockade spectroscopy experiments on quantum Hall droplets with controlled electron numbers (N 1, N 2) in laterally coupled gated quantum dots. The theory is based on the configuration interaction method (CI) coupled with the unrestricted Hartree-Fock (URHF) basis. It allows us to calculate the magnetic field evolution of ground and excited states of coupled quantum dots with large electron numbers. The method is applied to the spin transitions in the (5, 5) droplet. Preliminary experimental results demonstrate the creation of the (5, 5) droplet and its spin blockade spectra. {\copyright} 2006 Elsevier B.V. All rights reserved.},
Author = {Abolfath, R.M. and Hawrylak, P. and Pioro-Ladriere, M. and Sachrajda, A.},
Document_Type = {Article},
Journal = {Physica E: Low-Dimensional Systems and Nanostructures},
Number = {1-2},
Pages = {636-639},
Source = {Scopus},
Title = {Quantum Hall droplets in coupled lateral quantum dots},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746447786&partnerID=40&md5=4b4268f25f2eb60f3c7476ec2d3747e4},
Volume = {34},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746447786&partnerID=40&md5=4b4268f25f2eb60f3c7476ec2d3747e4}}
@article{Byszewski2006239,
Abstract = {In a high magnetic field, electrons confined to two dimensions form highly correlated states driven entirely by electron-electron interactions. Transport and cyclotron-resonance experiments on these fractional quantum Hall effect states, and the associated fractionally charged excitations, suggest the existence of composite fermions-electrons with two flux quanta attached. Using optical spectroscopy, we show that the two flux quanta in a composite fermion interacting with an exciton (a bound state of an electron and a hole) lead to filling-factor-dependent features in the optical emission spectrum, which are symmetric around filling factor v = 1/2, and fractionally charged excitations lead to fractionally charged excitons. In the vicinity of the incompressible v = 1/3 state we observe a doublet structure in the emission line, corresponding to excitations of the incompressible fluid. At filling factors v > 1/3, corresponding to the transition to a compressible metallic state, a new emission line appears, which we attribute to the fractionally charged quasi-exciton. {\copyright}2006 Nature Publishing Group.},
Author = {Byszewski, M. and Chwalisz, B. and Maude, D.K. and Sadowski, M.L. and Potemski, M. and Saku, T. and Hirayama, Y. and Studenikin, S. and Austing, D.G. and Sachrajda, A.S. and Hawrylak, P.},
Document_Type = {Article},
Journal = {Nature Physics},
Number = {4},
Pages = {239-243},
Source = {Scopus},
Title = {Optical probing of composite fermions in a two-dimensional electron gas},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33645785283&partnerID=40&md5=f46bdd6affd8d4a04c30aeca50a1ef2d},
Volume = {2},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33645785283&partnerID=40&md5=f46bdd6affd8d4a04c30aeca50a1ef2d}}
@article{Pou06b,
Abstract = {We consider the problem of optimally decoding a quantum error correction code --- that is to find the optimal recovery procedure given the outcomes of partial "check" measurements on the system. In general, this problem is NP-hard. However, we demonstrate that for concatenated block codes, the optimal decoding can be efficiently computed using a message passing algorithm. We compare the performance of the message passing algorithm to that of the widespread blockwise hard decoding technique. Our Monte Carlo results using the 5 qubit and Steane's code on a depolarizing channel demonstrate significant advantages of the message passing algorithms in two respects. 1) Optimal decoding increases by as much as 94% the error threshold below which the error correction procedure can be used to reliably send information over a noisy channel. 2) For noise levels below these thresholds, the probability of error after optimal decoding is suppressed at a significantly higher rate, leading to a substantial reduction of the error correction overhead.},
Author = {D. Poulin},
Date-Added = {2006-06-26 15:54:53 -0700},
Date-Modified = {2010-05-06 13:51:08 -0400},
Eprint = {quant-ph/0606126},
Journal = {Phys. Rev. A},
Keywords = {Error correction},
Local-Url = {Pou06b.pdf},
Pages = {052333},
Title = {Optimal and Efficient Decoding of Concatenated Quantum Block Codes},
Volume = {74},
Year = {2006}}
@article{Pou06a,
Abstract = {In the absence of an external frame of reference --- i.e. in background independent theories such as general relativity --- physical degrees of freedom must describe {em relations} between systems. Using a simple model, we investigate how such a relational quantum theory naturally arises by promoting reference systems to the status of dynamical entities. Our goal is twofold. First, we demonstrate using elementary quantum theory how any quantum mechanical experiment admits a purely relational description at a fundamental level. Second, we describe how the original "non-relational" theory approximately emerges from the fully relational theory when reference systems become semi-classical. Our technique is motivated by a Bayesian approach to quantum mechanics, and relies on the noiseless subsystem method of quantum information science used to protect quantum states against undesired noise. The relational theory naturally predicts a fundamental decoherence mechanism, so an arrow of time emerges from a time-symmetric theory. Moreover, our model circumvents the problem of the "collapse of the wave packet" as the probability interpretation is only ever applied to diagonal density operators. Finally, the physical states of the relational theory can be described in terms of "spin networks" introduced by Penrose as a combinatorial description of geometry, and widely studied in the loop formulation of quantum gravity. Thus, our simple bottom-up approach (starting from the semi-classical limit to derive the fully relational quantum theory) may offer interesting insights on the low energy limit of quantum gravity. },
Author = {David Poulin},
Date-Added = {2006-01-21 21:36:17 +1000},
Date-Modified = {2010-05-06 13:50:24 -0400},
Eprint = {quant-ph/0505081},
Journal = {Int. J. of Theor. Phys.},
Keywords = {Quantum Theory; Reference frame; Measurement; Gravity; Foundations},
Local-Url = {Pou06a.pdf},
Pages = {1229},
Title = {Toy model for a relational formulation of quantum theory},
Volume = {45},
Year = {2006}}
@article{Gaudreau20063757,
Abstract = {Recent developments in single and double electrostatically confined quantum dots have shown that these devices are promising candidates for the implementation of quantum computation schemes in solid state systems. One of the obstacles for such an accomplishment is scalability. We present here the first realization of a triple lateral quantum dot with a few number of electrons, going down to fundamental configurations such as the vacuum state (no electrons in the system) or one electron in each quantum dot. New phenomena unseen in single or double dots are revealed involving charge and spin reconfigurations within the system, reminiscent of quantum cellular automata (QCA) functionalities. More importantly, it is necessary to understand these phenomena for they will be present in any three or more coupled quantum dots system. An equivalent circuit analysis of the system is used to reproduce these new features and to highlight some differences between experiments and the model, possibly arising from quantum phenomena not included in the circuit analysis. {\copyright} 2006 WILEY-VCH Verlag GmbH & Co. KGaA.},
Author = {Gaudreau, L. and Sachrajda, A.S. and Studenikin, S. and Zawadzki, P. and Lapointe, J. and Kam, A.},
Document_Type = {Conference Paper},
Journal = {Physica Status Solidi (C) Current Topics in Solid State Physics},
Number = {11},
Pages = {3757-3761},
Source = {Scopus},
Title = {Equivalent circuit analysis of the stability diagram of a few electron triple quantum dots},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-49549112070&partnerID=40&md5=ce73f88ea6ee52a1b4d55340617d6106},
Volume = {3},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-49549112070&partnerID=40&md5=ce73f88ea6ee52a1b4d55340617d6106}}
@article{Gaudreau2006,
Abstract = {Individual and coupled quantum dots containing one or two electrons have been realized and are regarded as components for future quantum information circuits. In this Letter we map out experimentally the stability diagram of the few-electron triple dot system, the electron configuration map as a function of the external tuning parameters, and reveal experimentally for the first time the existence of quadruple points, a signature of the three dots being in resonance. In the vicinity of these quadruple points we observe a duplication of charge transfer transitions related to charge and spin reconfigurations triggered by changes in the total electron occupation number. The experimental results are largely reproduced by equivalent circuit analysis and Hubbard models. Our results are relevant for future quantum mechanical engineering applications within both quantum information and quantum cellular automata architectures. {\copyright} 2006 The American Physical Society.},
Art_Number = {036807},
Author = {Gaudreau, L. and Studenikin, S.A. and Sachrajda, A.S. and Zawadzki, P. and Kam, A. and Lapointe, J. and Korkusinski, M. and Hawrylak, P.},
Document_Type = {Article},
Journal = {Physical Review Letters},
Number = {3},
Source = {Scopus},
Title = {Stability diagram of a few-electron triple dot},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746255948&partnerID=40&md5=6d5d1d3d2c5bd69f33ad5c6440fa12db},
Volume = {97},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746255948&partnerID=40&md5=6d5d1d3d2c5bd69f33ad5c6440fa12db}}
@article{KLPL05a,
Abstract = {This paper is an expanded and more detailed version of the work
cite{KLP04} in which the Operator Quantum Error Correction
formalism was introduced. This is a new scheme for the error
correction of quantum operations that incorporates the known
techniques --- i.e. the standard error correction model, the
method of decoherence-free subspaces, and the noiseless subsystem
method --- as special cases, and relies on a generalized
mathematical framework for noiseless subsystems that applies to
arbitrary quantum operations. We also discuss a number of examples
and introduce the notion of "unitarily noiseless subsystems".},
Author = {Kribs, D. W. and Laflamme, R. and Poulin, D. and Lesosky, M.},
Date-Added = {2005-07-12 11:51:59 +1000},
Date-Modified = {2010-05-06 13:49:54 -0400},
Eprint = {quant-ph/0504189},
Journal = {Quant. Info. and Comp.},
Keywords = {Error correction; OQEC},
Local-Url = {KLPL05a.pdf},
Pages = {382},
Title = {Operator quantum error correction},
Volume = {6},
Year = {2006}}
@article{Long2006553,
Abstract = {We have studied at low temperatures the switching (telegraph) noise in quantum point contacts fabricated on GaAs/AlGaAs heterostructures and introduce a model for its origin which explains why the noise can be suppressed by cooling the samples with a positive bias applied to the gates. This model depends on there being a small tunnel current of electrons from gate to channel and we have detected such a current at the level of 10 - 20 A using a quantum corral fabricated on similar material. {\copyright} 2006 Elsevier B.V. All rights reserved.},
Author = {Long, A.R. and Pioro-Ladri{\`e}re, M. and Davies, J.H. and Sachrajda, A.S. and Gaudreau, L. and Zawadzki, P. and Lapointe, J. and Gupta, J. and Wasilewski, Z. and Studenikin, S.A.},
Document_Type = {Article},
Journal = {Physica E: Low-Dimensional Systems and Nanostructures},
Number = {1-2},
Pages = {553-556},
Source = {Scopus},
Title = {The origin of switching noise in GaAs/AlGaAs lateral gated devices},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746656259&partnerID=40&md5=93aa62abadbbd61616ef41f18fb61782},
Volume = {34},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746656259&partnerID=40&md5=93aa62abadbbd61616ef41f18fb61782}}
@Article{PioroLadriere:2006p731,
author = {M Pioro-Ladriere and A Usher and AS Sachrajda and J Lapointe and J Gupta and Z Wasilewski and S Studenikin and M Elliott},
journal = {Phys Rev B},
title = {Influence of the long-lived quantum Hall potential on the characteristics of quantum devices},
abstract = {Hysteretic effects are reported in magneto-transport experiments on lateral quantum devices. The effects are characterized by two vastly different relaxation times (minutes and days). It is shown that the observed phenomena are related to long-lived eddy currents. This is confirmed by torsion-balance magnetometry measurements of the same two-dimensional electron gas (2DEG) material. These observations show that the induced quantum Hall potential at the edges of the 2DEG reservoirs influences transport through the devices, and have important consequences for the transport properties of all lateral devices, subjected to quantizing magnetic fields.},
affiliation = {Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada},
number = {7},
pages = {075309},
volume = {73},
year = {2006},
month = {Jan},
language = {English},
keywords = {Coulomb, Eddy Currents, Integer, Blockade, Contactless Detection, Current Breakdown, Dot},
date-added = {2010-05-14 10:45:30 -0400},
date-modified = {2010-05-14 10:45:30 -0400},
doi = {10.1103/PhysRevB.73.075309},
pmid = {000235668900069},
uri = {papers://2218479D-7AA1-43D5-8E9E-4EF38C7D1379/Paper/p731},
rating = {0}
}
@article{MP06a,
Abstract = {Using an elementary example based on two simple harmonic oscillators, we show how a relational time may be defined that leads to an approximate Schr{"o}dinger dynamics for subsystems, with corrections leading to an intrinsic decoherence in the energy eigenstates of the subsystem. },
Author = {Milburn, G. J. and Poulin, D.},
Date-Added = {2005-05-09 14:26:54 +1000},
Date-Modified = {2010-05-06 13:49:09 -0400},
Eprint = {quant-ph/050517},
Journal = {Int. J. Quant. Info.},
Keywords = {Reference frame; Quantum Theory; Gravity; Foundations},
Local-Url = {MP06a.pdf},
Pages = {151},
Title = {Relational time for systems of oscillators},
Volume = {4},
Year = {2006}}
@article{Moreau2006203,
Abstract = {We study the properties of high mobility GaAs/GaAlAs quantum well structure by monitoring the microwave induced changes in the low-temperature photoluminescence of the 2DEG as a function of the external magnetic field. The most pronounced changes are observed at cyclotron resonance conditions, but weak features are also visible at cyclotron resonance replicas. Possible observation of microwave induced shift in the Landau-level structure of magneto-photoluminescence is reported in addition to the effects of carrier heating which are conventionally bracketed together with microwave irradiation. {\copyright} 2006 Elsevier B.V. All rights reserved.},
Author = {Moreau, S. and Byszewski, M. and Sadowski, M.L. and Potemski, M. and Studenikin, S.A. and Austing, G. and Sachrajda, A.S. and Saku, T. and Hirayama, Y.},
Document_Type = {Article},
Journal = {Physica E: Low-Dimensional Systems and Nanostructures},
Number = {1-2 SPEC. ISS.},
Pages = {203-206},
Source = {Scopus},
Title = {Optically detected cyclotron resonance in a high mobility 2D electron gas},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33646481052&partnerID=40&md5=b5eab6e7e3b7b67f3e3a90751f14d3ba},
Volume = {32},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33646481052&partnerID=40&md5=b5eab6e7e3b7b67f3e3a90751f14d3ba}}
@article{PioroLadriere2006,
Abstract = {Hysteretic effects are reported in magneto-transport experiments on lateral quantum devices. The effects are characterized by two vastly different relaxation times (minutes and days). It is shown that the observed phenomena are related to long-lived eddy currents. This is confirmed by torsion-balance magnetometry measurements of the same two-dimensional electron gas (2DEG) material. These observations show that the induced quantum Hall potential at the edges of the 2DEG reservoirs influences transport through the devices, and have important consequences for the transport properties of all lateral devices, subjected to quantizing magnetic fields. {\copyright} 2006 The American Physical Society.},
Art_Number = {075309},
Author = {Pioro-Ladri{\`e}re, M. and Usher, A. and Sachrajda, A.S. and Lapointe, J. and Gupta, J. and Wasilewski, Z. and Studenikin, S. and Elliott, M.},
Document_Type = {Article},
Journal = {Physical Review B - Condensed Matter and Materials Physics},
Number = {7},
Source = {Scopus},
Title = {Influence of the long-lived quantum Hall potential on the characteristics of quantum devices},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33144470474&partnerID=40&md5=94caf0b6c392d409aa98f2747061aa53},
Volume = {73},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33144470474&partnerID=40&md5=94caf0b6c392d409aa98f2747061aa53}}
@conference{Studenikin2006871,
Abstract = {We report the first experimental realization of a semiconductor triple quantum dot system in a few electrons regime. Charging properties of this "artificial tri-atom" are studied using non-invasive charge detection technique. The most fundamental configuration was initialized in which a single electron is shared resonantly between the three dots and also equivalent arrangements involving two or three electrons. Using gates we are able to tune through the quadruple points, a unique feature of triple dot systems. At a quadruple point the quantum states in all three dots resonantly coincide with each other and with the chemical potential of the leads. Unexpectedly, novel charge re-arrangement lines were observed in vicinity of quadruple points. The observed charge re-arrangement can be viewed as a basic realization of quantum cellular automata in the few electron regime. Such phenomenon may be expected for all multiple quantum dot systems greater than two, in which a change in the state of one dot may instantaneously trigger a charge rearrangement of the system. The results may lead to new opportunities for fundamental physics research and for other applications, e.g. quantum computing. {\copyright} 2006 Crown Copyright.},
Art_Number = {1717248},
Author = {Studenikin, S. and Gaudreau, L. and Sachrajda, A. and Zawadzki, P. and Kam, A. and Lapointe, J. and Korkusinski, M. and Hawrylak, P.},
Document_Type = {Conference Paper},
Journal = {2006 6th IEEE Conference on Nanotechnology, IEEE-NANO 2006},
Pages = {871-874},
Source = {Scopus},
Title = {Charging characteristics of a few electron triple lateral quantum dot system in GaAs/AlGaAs},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-42549128704&partnerID=40&md5=80e69dd9c66fe7780e294c3988b83340},
Volume = {2},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-42549128704&partnerID=40&md5=80e69dd9c66fe7780e294c3988b83340}}
@article{Studenikin200673,
Abstract = {Microwave induced resistance oscillations (MIROs) were studied experimentally over a very wide range of frequencies ranging from ∼20 GHz up to ∼4 THz, and from the quasi-classical regime to the quantum Hall effect regime. At low frequencies regular MIROs were observed, with a periodicity determined by the ratio of the microwave to cyclotron frequencies. For frequencies below 150 GHz the magnetic field dependence of MIROs waveform is well described by a simplified version of an existing theoretical model, where the damping is controlled by the width of the Landau levels. In the THz frequency range MIROs vanish and only pronounced resistance changes are observed at the cyclotron resonance. The evolution of MIROs with frequency is presented and discussed. {\copyright} 2006 Elsevier B.V. All rights reserved.},
Author = {Studenikin, S.A. and Byszewski, M. and Maude, D.K. and Potemski, M. and Sachrajda, A. and Wasilewski, Z.R. and Hilke, M. and Pfeiffer, L.N. and West, K.W.},
Document_Type = {Article},
Journal = {Physica E: Low-Dimensional Systems and Nanostructures},
Number = {1-2},
Pages = {73-76},
Source = {Scopus},
Title = {The microwave induced resistance response of a high mobility 2DEG from the quasi-classical limit to the quantum Hall regime},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746385835&partnerID=40&md5=95134d7ac2aff65a36e7e3e6be940bb3},
Volume = {34},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33746385835&partnerID=40&md5=95134d7ac2aff65a36e7e3e6be940bb3}}