On Nov 8, Dr. Katherine Brown will give a talk in the journal club.
Title:
Multi-dimensional Systems in Quantum Logic
Articles:
Simplifying quantum logic using higher-dimensional Hilbert Spaces
B.P. Lanyon et al.
Nature Physics 5, 134-140 (2009)
Adding Control to arbitrary unknown quantum operations
X.Q. Zhou et al.
arXiv:1006.2670v2
(Nature Communications 2, Article number: 413)
Abstract:
Standard quantum computing circuits using qubits, two dimensional quantum systems in order to create logic gates. In these two papers the authors show that using higher-dimensional systems, it is possible to perform the necessary quantum logic gates in a far simpler fashion, requiring simpler gates, and less of these gates. In my talk I will highlight the results of these papers and explain where their efficiency savings come from, and the limits of recreating the results in terms of qubits.
Time: 11/08/2011 4-5pm
Location: Rm 262 Nicholson
Monday, November 7, 2011
Tuesday, October 25, 2011
Club Meeting 10/25: Sheng Feng
Today, Sheng will give a talk on
Ferromagnetic-glassy Transition in 3d Ising Spin Glass
Article:
Phys. Rev. B 84, 134202 (2011)
link
Time: 10/25/2011 4-5 pm
Location: Rm 262 Nicholson Hall
Ferromagnetic-glassy Transition in 3d Ising Spin Glass
Article:
Phys. Rev. B 84, 134202 (2011)
link
Time: 10/25/2011 4-5 pm
Location: Rm 262 Nicholson Hall
Monday, October 10, 2011
Club Meeting 10/11: Dr. Jing Teng
On Oct 11, Dr. Jing Teng will give a talk about:
Title:
Fibonacci number in nature at the microscopic level
Article:
Triangular and Fibonacci Number Patterns Driven by Stress on Core/Shell Microstructures
SCIENCE 309, 909 (2005)
Time: 10/11/2011 Tue 4-5pm
Location: Rm 262 Nicholson Hall
Title:
Fibonacci number in nature at the microscopic level
Article:
Triangular and Fibonacci Number Patterns Driven by Stress on Core/Shell Microstructures
SCIENCE 309, 909 (2005)
Time: 10/11/2011 Tue 4-5pm
Location: Rm 262 Nicholson Hall
Tuesday, October 4, 2011
Club Meeting 10/04: Chen Chen
On Oct 4, Chen Chen will give us a talk about:
Title:
Effect of Anharmonicity: Temperature Dependence of Phonon Energy and Width
Articles:
Anharmonic effects in light scattering due to optical phonons in silicon
Phys. Rev. B 28, 1928–1934 (1983)
link
Anharmonic phonon effects in Raman spectra of unsupported vertical graphene sheets
Phys. Rev. B 83, 125430 (2011)
link
Time: 10/04/2011 4-5pm
Location: Rm 262 Nicholson Hall
Title:
Effect of Anharmonicity: Temperature Dependence of Phonon Energy and Width
Articles:
Anharmonic effects in light scattering due to optical phonons in silicon
Phys. Rev. B 28, 1928–1934 (1983)
link
Anharmonic phonon effects in Raman spectra of unsupported vertical graphene sheets
Phys. Rev. B 83, 125430 (2011)
link
Time: 10/04/2011 4-5pm
Location: Rm 262 Nicholson Hall
Sunday, September 25, 2011
Club Meeting 09/27: Neel Haldolaarachchige
On Sep 27, Neel will give us a talk about:
Title:
Recent studies of Ferromagnetic Quantum Critical point on intermetallic systems
Articles:
Ferromagnetic quantum critical point induced by dimer-breaking in SrCo2(Ge1−xPx)2
Nature Physics 7, 207–210 (2011)
Evidence for a spin singlet state in the intermetallic semiconductor FeGa3
Phys. Rev. B 82, 155202 (2010)
Correlation effects in the small gap semiconductor FeGa3
Journal of Physics: Conference Series, Volume 200, Issue 1, pp. 012014 (2010)
Time: 09/27/2011 4-5pm
Location: Rm 262, Nicholson Hall
Title:
Recent studies of Ferromagnetic Quantum Critical point on intermetallic systems
Articles:
Ferromagnetic quantum critical point induced by dimer-breaking in SrCo2(Ge1−xPx)2
Nature Physics 7, 207–210 (2011)
Evidence for a spin singlet state in the intermetallic semiconductor FeGa3
Phys. Rev. B 82, 155202 (2010)
Correlation effects in the small gap semiconductor FeGa3
Journal of Physics: Conference Series, Volume 200, Issue 1, pp. 012014 (2010)
Time: 09/27/2011 4-5pm
Location: Rm 262, Nicholson Hall
Saturday, September 17, 2011
Club Meeting 09/20: Kaushik Seshadreesan
On Sept 20, Kaushik will give a talk on:
General Optimality of the Heisenberg Limit for Quantum Metrology
Phys. Rev. Lett. 105, 180402 (2010)
Time: 09/20/2011 4-5pm
Location: Rm 262 Nicholson Hall
General Optimality of the Heisenberg Limit for Quantum Metrology
Phys. Rev. Lett. 105, 180402 (2010)
Time: 09/20/2011 4-5pm
Location: Rm 262 Nicholson Hall
Friday, September 9, 2011
Club Meeting 09/13: Dr. Ilya Vekhter
We are glad to have Dr. Ilya Vekhter to give a talk on Sept. 13.
Title: Magnetically driven superconductivity in CeCu2Si2
Article:
Magnetically driven superconductivity in CeCu2Si2
Stockert et al.
Nature Physics 7, 119–124 (2011)
Time: 09/13/2011 4-5pm
Location: Rm 262 Nicholson Hall
Title: Magnetically driven superconductivity in CeCu2Si2
Article:
Magnetically driven superconductivity in CeCu2Si2
Stockert et al.
Nature Physics 7, 119–124 (2011)
Time: 09/13/2011 4-5pm
Location: Rm 262 Nicholson Hall
Sunday, September 4, 2011
Club Meeting 09/06: Joseph Prestigiacomo
On Sept. 6, Joseph Prestigiacomo will talk about:
Title: Coulomb Glass Effects Across the MIT in a 2D Electron System in Si
Articles:
"Aging Effects across the Metal-Insulator Transition in Two Dimensions"
Phys.Rev.Lett. 99, 216401 (2007)
"Nonexponential Relaxations in a Two-Dimensional Electron System in Silicon"
Phys.Rev.Lett. 96, 037403 (2006)
(Optional) "Slow conductance relaxations: Distinguishing the electron glass from extrinsic mechanisms"
Phys.Rev.B 78, 195120 (2008)
Time: 09/06/2011 Tue 4-5pm
Location: Rm 262 Nicholson Hall
Title: Coulomb Glass Effects Across the MIT in a 2D Electron System in Si
Articles:
"Aging Effects across the Metal-Insulator Transition in Two Dimensions"
Phys.Rev.Lett. 99, 216401 (2007)
"Nonexponential Relaxations in a Two-Dimensional Electron System in Silicon"
Phys.Rev.Lett. 96, 037403 (2006)
(Optional) "Slow conductance relaxations: Distinguishing the electron glass from extrinsic mechanisms"
Phys.Rev.B 78, 195120 (2008)
Time: 09/06/2011 Tue 4-5pm
Location: Rm 262 Nicholson Hall
Sunday, August 28, 2011
Club Meeting 08/30: Dr. Ka Ming Tam
On Aug 30, Dr. Ka Ming Tam will talk about
Title: Ising Model
(with a focus on low dimensions)
Article:
Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E8 Symmetry
Science 8 January 2010
Vol. 327 no. 5962 pp. 177-180
link
Time: Aug 30 2011, Tue, 4-5pm
Location: Rm 262, Nicholson Hall
Title: Ising Model
(with a focus on low dimensions)
Article:
Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E8 Symmetry
Science 8 January 2010
Vol. 327 no. 5962 pp. 177-180
link
Time: Aug 30 2011, Tue, 4-5pm
Location: Rm 262, Nicholson Hall
Sunday, August 21, 2011
Club meeting 08/23: Conrad Moore
On Aug 23, Conrad Moore will talk about:
Title: Diagrammatic Perturbation Series via the Replica Method
Article:
Systematic and causal corrections to the coherent potential approximation
Jarrell et al.
PHYSICAL REVIEW B, VOLUME 63, 125102
Conrad will mainly focus on Section 2 and the Appendix.
Time: 08/23/2011 4-5pm
Location: Rm 262 Nicholson Hall
Title: Diagrammatic Perturbation Series via the Replica Method
Article:
Systematic and causal corrections to the coherent potential approximation
Jarrell et al.
PHYSICAL REVIEW B, VOLUME 63, 125102
Conrad will mainly focus on Section 2 and the Appendix.
Time: 08/23/2011 4-5pm
Location: Rm 262 Nicholson Hall
Friday, August 19, 2011
Fall semester meeting time CHANGED
The fall semester meeting time is changed from Wed 4-5pm to
Tuesday, 4-5 pm
The meeting location is still Rm 262.
The reason of this change is because several club members cannot attend a Wednesday meeting and the room is occupied by a class on Wednesday. The change was made final by a small scale vote.
If a speaker has time conflict with this new arrangement, please email me asap to find another time, although I will also contact each speaker to make sure.
The meeting location is still Rm 262.
The reason of this change is because several club members cannot attend a Wednesday meeting and the room is occupied by a class on Wednesday. The change was made final by a small scale vote.
If a speaker has time conflict with this new arrangement, please email me asap to find another time, although I will also contact each speaker to make sure.
Monday, August 15, 2011
Club Meeting 08/17: Gaoming Wang
Gaoming Wang will talk about skyrmion on Aug 17.
Title: The Skyrmion Crystal
Article: Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe
Yu et al.
Nature Materials 10, 106–109 (2011)
link
Time: Aug 17 noon 12-1pm
Location: Rm 435 Nicholson Hall
Note that the time and location will change to Wed 4-5pm, Rm 262, starting next week.
update 08/21: The fall semester meeting time is changed to Tue 4-5pm. Location is still Rm 262. see this post.
Title: The Skyrmion Crystal
Article: Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe
Yu et al.
Nature Materials 10, 106–109 (2011)
link
Time: Aug 17 noon 12-1pm
Location: Rm 435 Nicholson Hall
Note that the time and location will change to Wed 4-5pm, Rm 262, starting next week.
update 08/21: The fall semester meeting time is changed to Tue 4-5pm. Location is still Rm 262. see this post.
Sunday, August 7, 2011
Club meeting 08/10/11: Kebei Jiang
Kebei Jiang will talk on Aug 10 about:
Title: Physics of Ghost Imaging
He will introduce two articles:
1
Yanhua Shih, "The physics of ghost imaging", International Conference on Quantum Information (ICQI) 2008 paper: QTuB1
2
Yaron Bromberg, "Ghost Imaging with a single detector", PRA, 79, 053840 (2009)
Time: 08/10/2011 12-1pm
Location: Rm 435 Nicholson Hall
Title: Physics of Ghost Imaging
He will introduce two articles:
1
Yanhua Shih, "The physics of ghost imaging", International Conference on Quantum Information (ICQI) 2008 paper: QTuB1
2
Yaron Bromberg, "Ghost Imaging with a single detector", PRA, 79, 053840 (2009)
Time: 08/10/2011 12-1pm
Location: Rm 435 Nicholson Hall
Saturday, July 30, 2011
Articles for 08/03/11 Xiaoyao Ma
Title: Quantum Monte Carlo
Speaker: Xiaoyao Ma
Articles:
1
Kink-based path integral calculations of atoms He–Ne
Randall W. Hall
Chemical Physics Letters 362 (2002) 549–55
2
An adaptive, kink-based approach to path integral calculations
Randall W. Hall
J. Chem. Phys., Vol. 116, No. 1, 1 January 2002
(both available on arXiv)
Time: 08/03/2011 12-1pm
Location: Rm 435 Nicholson Hall
Speaker: Xiaoyao Ma
Articles:
1
Kink-based path integral calculations of atoms He–Ne
Randall W. Hall
Chemical Physics Letters 362 (2002) 549–55
2
An adaptive, kink-based approach to path integral calculations
Randall W. Hall
J. Chem. Phys., Vol. 116, No. 1, 1 January 2002
(both available on arXiv)
Time: 08/03/2011 12-1pm
Location: Rm 435 Nicholson Hall
Saturday, July 23, 2011
Articles for 07/27/11 Qinqin Lü
Title: Quantum Gas with Interaction and Disorder
In short, I will talk about two articles:
1.
Phys. Rev. Lett. 106, 230401 (2011)
Can a Bose Gas Be Saturated?
2.
Nature Physics 6, 87-95 (2010)
Disordered quantum gases under control
Time: 07/27/2011 12-1pm. Bring your lunch! (as we don't provide lunch or cookies...yet...)
Location: Rm 435, Nicholson Hall
Full version:
I will first introduce some background such as:
- what is Bose Einstein condensation?
- Cold atom experiments involving optical lattice
- Interaction effects and phase transition
As a statistical example to show the interaction effects and to verify Einstein's theory as the correct theory at non-interacting limit, I will spend a little time on the 1st article:
Phys. Rev. Lett. 106, 230401 (2011)
Can a Bose Gas Be Saturated?
Naaman Tammuz, Robert P. Smith, Robert L. D. Campbell, Scott Beattie, Stuart Moulder, Jean Dalibard, and Zoran Hadzibabic
link
Then, when bringing in disorder, novel phenomena such as Anderson localization of matter-waves can be observed. This part will focus on the 2nd article:
Nature Physics 6, 87-95 (2010)
Disordered quantum gases under control
Laurent Sanchez-Palencia & Maciej Lewenstein
link
The latter part is not exactly what I am working on so hopefully I won't be standing blank-minded too much.
In short, I will talk about two articles:
1.
Phys. Rev. Lett. 106, 230401 (2011)
Can a Bose Gas Be Saturated?
2.
Nature Physics 6, 87-95 (2010)
Disordered quantum gases under control
Time: 07/27/2011 12-1pm. Bring your lunch! (as we don't provide lunch or cookies...yet...)
Location: Rm 435, Nicholson Hall
Full version:
I will first introduce some background such as:
- what is Bose Einstein condensation?
- Cold atom experiments involving optical lattice
- Interaction effects and phase transition
As a statistical example to show the interaction effects and to verify Einstein's theory as the correct theory at non-interacting limit, I will spend a little time on the 1st article:
Phys. Rev. Lett. 106, 230401 (2011)
Can a Bose Gas Be Saturated?
Naaman Tammuz, Robert P. Smith, Robert L. D. Campbell, Scott Beattie, Stuart Moulder, Jean Dalibard, and Zoran Hadzibabic
link
Then, when bringing in disorder, novel phenomena such as Anderson localization of matter-waves can be observed. This part will focus on the 2nd article:
Nature Physics 6, 87-95 (2010)
Disordered quantum gases under control
Laurent Sanchez-Palencia & Maciej Lewenstein
link
The latter part is not exactly what I am working on so hopefully I won't be standing blank-minded too much.
Friday, July 22, 2011
Fall semester meeting arrangement
As agreed by a small vote among frequent participants, the club will meet at the following time and place in the fall semester, starting at Aug 24:
Wednesday, 4-5 pm
Rm 262 Nicholson Hall.
The lunch time is no more available because it conflicts with several classes.
I am now registering speakers for the fall semesters. Sign up early to get your preferred time slot.
update 08/21: The fall semester meeting time is changed to Tue 4-5pm. Location is still Rm 262. see this post.
Wednesday, 4-5 pm
Rm 262 Nicholson Hall.
The lunch time is no more available because it conflicts with several classes.
I am now registering speakers for the fall semesters. Sign up early to get your preferred time slot.
update 08/21: The fall semester meeting time is changed to Tue 4-5pm. Location is still Rm 262. see this post.
Friday, July 15, 2011
Articles for 07/20/11 Dr. Shaohao Chen
(updated with Abstract)
On July 20, Dr. Shaohao Chen will give a talk about attosecond science:
Title:
Attosecond Science: Time-resolved Electron Dynamics in Atoms and Molecules
Abstract:
Do you want to see an ultrafast world?
Do you want to see atomic photography?
Do you want to know about a potential Nobel-prize topic?
All the answers are in attosecond science.
Attosecond is equal to 10^-18 second, which is the time scale of the motion of electrons in atoms. Attosecond science is a new and exciting research topic in both fundamental and applied atomic molecular optical (AMO) physics. In my talk, I will talk about the some aspects of the attosecond science, such as generation of attosecond pulses, attosecond measurement technique and time-resolved measurement of electron dynamics. As an example, I will discuss some exciting results for the measurement of time delay in photoionization of atoms, which have been published very recently.
The talk will introduce two articles:
1.
Delay in Photoemission
Science 25 June 2010
Vol. 328 no. 5986 pp. 1658-1662
2.
Probing Single-Photon Ionization on the Attosecond Time Scale
Phys. Rev. Lett. 106, 143002 (2011)
Time: 07/20/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
On July 20, Dr. Shaohao Chen will give a talk about attosecond science:
Title:
Attosecond Science: Time-resolved Electron Dynamics in Atoms and Molecules
Abstract:
Do you want to see an ultrafast world?
Do you want to see atomic photography?
Do you want to know about a potential Nobel-prize topic?
All the answers are in attosecond science.
Attosecond is equal to 10^-18 second, which is the time scale of the motion of electrons in atoms. Attosecond science is a new and exciting research topic in both fundamental and applied atomic molecular optical (AMO) physics. In my talk, I will talk about the some aspects of the attosecond science, such as generation of attosecond pulses, attosecond measurement technique and time-resolved measurement of electron dynamics. As an example, I will discuss some exciting results for the measurement of time delay in photoionization of atoms, which have been published very recently.
The talk will introduce two articles:
1.
Delay in Photoemission
Science 25 June 2010
Vol. 328 no. 5986 pp. 1658-1662
2.
Probing Single-Photon Ionization on the Attosecond Time Scale
Phys. Rev. Lett. 106, 143002 (2011)
Time: 07/20/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Friday, July 8, 2011
Article for 07/13/11 Chinedu Ekuma
On July 13, Chinedu Ekuma will talk about:
Doping-dependent thermopower of PbTe from Boltzmann transport calculations
Phys. Rev. B 81, 195217 (2010)
Although it is a PRB article, it is only 5 pages and Chinedu promises it will be interesting.
link
Time: 07/13/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
-------
The journal club meetings for the Fall semester will start around Aug 20. The weekly meeting time is to be determined. If you are interested in giving a talk in the fall, please email me or see me at Rm 215A.
Doping-dependent thermopower of PbTe from Boltzmann transport calculations
Phys. Rev. B 81, 195217 (2010)
Although it is a PRB article, it is only 5 pages and Chinedu promises it will be interesting.
link
Time: 07/13/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
-------
The journal club meetings for the Fall semester will start around Aug 20. The weekly meeting time is to be determined. If you are interested in giving a talk in the fall, please email me or see me at Rm 215A.
Friday, July 1, 2011
Article for 07/06/11 Ryky Nelson
Ryky Nelson will talk about:
Making Nonmagnetic Semiconductors Ferromagnetic
H. Ohno
Science 14 August 1998:
Vol. 281 no. 5379 pp. 951-956
DOI: 10.1126/science.281.5379.951
Time: 07/06/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Making Nonmagnetic Semiconductors Ferromagnetic
H. Ohno
Science 14 August 1998:
Vol. 281 no. 5379 pp. 951-956
DOI: 10.1126/science.281.5379.951
Time: 07/06/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Friday, June 24, 2011
Article for 06/29/11 Dr. Kelly Patton
Dr. Kelly Patton will talk about:
Quantum ground state and single-phonon control of a mechanical resonator
A. D. O’Connell, M. Hofheinz, M. Ansmann, Radoslaw C. Bialczak, M. Lenander, Erik Lucero, M. Neeley, D. Sank, H. Wang, M. Weides, J. Wenner, John M. Martinis & A. N. Cleland
Nature 464, 697-703 (1 April 2010)
doi:10.1038/nature08967
Time: 06/29/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Quantum ground state and single-phonon control of a mechanical resonator
A. D. O’Connell, M. Hofheinz, M. Ansmann, Radoslaw C. Bialczak, M. Lenander, Erik Lucero, M. Neeley, D. Sank, H. Wang, M. Weides, J. Wenner, John M. Martinis & A. N. Cleland
Nature 464, 697-703 (1 April 2010)
doi:10.1038/nature08967
Time: 06/29/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Wednesday, June 15, 2011
Article for 06/22/11 Guorong Li
Guorong Li will talk about STM and
Realizing All-Spin−Based Logic Operations Atom by Atom
Alexander Ako Khajetoorians, Jens Wiebe, Bruno Chilian, Roland Wiesendanger
Science 332, 1062 (2011);
DOI: 10.1126/science.1201725
Time: 06/22/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Realizing All-Spin−Based Logic Operations Atom by Atom
Alexander Ako Khajetoorians, Jens Wiebe, Bruno Chilian, Roland Wiesendanger
Science 332, 1062 (2011);
DOI: 10.1126/science.1201725
Time: 06/22/2011 12:00-1:00 pm
Location: Rm 435 Nicholson Hall
Friday, June 10, 2011
Article for 06/15/11
On June 15, Dr. Tijiang Liu (TJ) will talk about
Spin-Resolved Tunneling Studies of the Exchange Field in EuS/Al Bilayers
Y. M. Xiong, S. Stadler, P. W. Adams, G. Catelani
arXiv link
Spin-Resolved Tunneling Studies of the Exchange Field in EuS/Al Bilayers
Y. M. Xiong, S. Stadler, P. W. Adams, G. Catelani
arXiv link
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