COVID-19 information for PI Residents and Visitors
- Yakir Aharonov, Chapman University
- Alonso Botero, Universidad de los Andes
- Robert Boyd, University of Ottawa & University of Rochester
- Boris Braverman, Massachusetts Institute of Technology
- Andrew Briggs, University of Oxford
- Roman Buniy, Chapman University
- Eli Cohen, Bristol University
- Lajos Diosi, Wigner Research Centre for Physics
- Justin Dressel, Chapman University
- Avshalom Elitzur, Israeli Institute for Advanced Research
- Yuval Gefen, Weizmann Institute
- John Gray, Naval Surface Warfare Center, Dahlgren
- Armen Gulian, Chapman University
- Lucien Hardy, Perimeter Institute
- Yuji Hasegawa, Vienna University of Technology
- Holger Hofmann, Hiroshima University
- John Howell, University of Rochester
- Andrew Jordan, University of Rochester
- Tirzah Kaufherr, Tel Aviv University
- Sir Anthony Leggett, University of Illinois at Urbana-Champaign
- Matthew Leifer, Chapman University
- Gus Lobo, Universidade Federal de Ouro Preto
- Kelvin McQueen, Tel Aviv University
- Ali Nayeri, Chapman University
- Arun Pati, Harish-Chandra Research Institute
- Philip Pearle, Hamilton College
- Marlan Scully, Texas A&M University
- Yutaka Shikano, Institute for Molecular Science, National Institutes of Natural Sciences
- Lee Smolin, Perimeter Institute
- Robert Spekkens, Perimeter Institute
- Aephraim Steinberg, University of Toronto
- Jeff Tollaksen, Chapman University
- Mauricio Torres, Darmstadt University of Technology
- James Troupe, University of Texas
- Neil Turok, Perimeter Institute
- Bill Unruh, University of British Columbia
- Lev Vaidman, Tel Aviv University
- Cai Waegell, Chapman University
- Yakir Aharonov, Chapman University
- David Albert, Columbia University
- James Bardeen, University of Washington
- Alonso Botero, Universidad de los Andes
- Frederic Bouchard, University of Ottawa
- Cristian Bourgeois, Chapman University
- Robert Boyd, University of Ottawa & University of Rochester
- Boris Braverman, Massachusetts Institute of Technology
- Andrew Briggs, University of Oxford
- Roman Buniy, Chapman University
- Areeya Chantasri, University of Rochester
- Eli Cohen, Bristol University
- Ismaell DePaiva, Chapman University
- Lajos Diosi, Wigner Research Centre for Physics
- Justin Dressel, Chapman University
- Avshalom Elitzur, Israeli Institute for Advanced Research
- Robert Fickler, University of Ottawa
- Luis Pedro Garcia-Pintos, Bristol University
- Yuval Gefen, Weizmann Institute
- John Gray, Naval Surface Warfare Center, Dahlgren
- Lucien Hardy, Perimeter Institute
- Jeremie Harris, University of Ottawa
- Yuji Hasegawa, Vienna University of Technology
- Holger Hofmann, Hiroshima University
- John Howell, University of Rochester
- Andrew Jordan, University of Rochester
- Tirzah Kaufherr, Tel Aviv University
- Tim Koslowski, Universidad Nacional Autónoma de México (UNAM)
- Tomer Landsberger, Tel Aviv University
- Sir Anthony Leggett, University of Illinois at Urbana-Champaign
- Matthew Leifer, Chapman University
- Bernadette Lessel, Perimeter Institute
- Philippe Lewalle, University of Rochester
- Gus Lobo, Universidade Federal de Ouro Preto
- Kelvin McQueen, Tel Aviv University
- Alvaro Mozota, Perimeter Institute
- Markus Mueller, Perimeter Institute & University of Western Ontario
- Ali Nayeri, Chapman University
- Shengshi Pang, University of Rochester
- Arun Pati, Harish-Chandra Research Institute
- Taylor Patti, Chapman University
- Philip Pearle, Hamilton College
- Nitica Sakharwade, Perimeter Institute
- Marlan Scully, Texas A&M University
- Yutaka Shikano, Institute for Molecular Science, National Institutes of Natural Sciences
- Tomer Shushi, University of Haifa
- Lee Smolin, Perimeter Institute
- Robert Spekkens, Perimeter Institute
- Aephraim Steinberg, University of Toronto
- Jeff Tollaksen, Chapman University
- Mauricio Torres, Darmstadt University of Technology
- James Troupe, University of Texas
- Neil Turok, Perimeter Institute
- Bill Unruh, University of British Columbia
- Lev Vaidman, Tel Aviv University
- Luz Jimenez Vela, Chapman University
- Cai Waegell, Chapman University
- Elie Wolfe, Perimeter Institute
Monday, June 20, 2016
Time |
Event |
Location |
8:30 – 9:00am |
Registration |
Reception |
9:00 – 9:10am |
Welcome and Opening Remarks |
Bob Room |
|
SESSION 1: Foundational questions |
|
9:10 – 10:00am |
Yakir Aharonov, Chapman University |
Bob Room |
10:00 – 10:45am |
Aephraim Steinberg, University of Toronto |
Bob Room |
10:45 – 11:00am |
Coffee Break |
Bistro – 1st Floor |
11:00 – 11:45am |
Marlan Scully, Texas A&M University |
Bob Room |
11:45 – 12:30pm |
Avshalom Elitzur, Israeli Institute for Advanced Research |
Bob Room |
12:30 – 2:00pm |
Lunch |
Bistro – 2nd Floor |
|
SESSION 2: Quantum correlation |
|
2:00 – 2:30pm |
Andrew Jordan, University of Rochester |
Bob Room |
2:30pm – 3:00pm |
Yutaka Shikano, |
Bob Room |
3:00 – 3:30pm |
Coffee Break |
Bistro – 1st Floor |
3:30 – 4:00pm |
Cai Waegell, Chapman University |
Bob Room |
4:00 – 4:30pm |
Justin Dressel, Chapman University |
Bob Room |
4:30 – 4:45pm |
Coffee Break |
Bistro – 1st Floor |
4:45 – 5:30pm |
Sir Anthony Leggett, University of Illinois at Urbana-Champaign |
Bob Room |
Tuesday, June 21, 2016
Time |
Event |
Location |
|
SESSION 3: Implementations |
|
9:00 – 9:45am |
Yakir Aharonov, Chapman University |
Bob Room |
9:45 – 10:30am |
Andrew Briggs, University of Oxford |
Bob Room |
10:30 – 11:00am |
Coffee Break |
Bistro – 1st Floor |
11:00 – 11:45am |
Robert Boyd, University of Ottawa/ University of Rochester |
Bob Room |
11:45 – 12:30pm |
John Howell, University of Rochester |
Bob Room |
12:30 – 2:00pm |
Lunch |
Bistro – 2nd Floor |
|
SESSION 4: Quantum phases |
|
2:00 – 2:30pm |
Roman Buniy, Chapman University |
Bob Room |
2:30pm – 3:00pm |
Gus Lobo, Universidade Federal de Ouro Preto |
Bob Room |
3:00 – 3:10pm |
Conference Photo |
TBA |
3:10 – 3:30pm |
Coffee Break |
Bistro – 1st Floor |
3:30 – 4:00pm |
Tirzah Kaufherr, Tel Aviv University |
Bob Room |
4:00 – 4:30pm |
Alonso Botero, Universidad de los Andes |
Bob Room |
4:30 – 4:45pm |
Coffee Break |
Bistro – 1st Floor |
4:45 – 5:30pm |
Philip Pearle, Hamilton College |
Bob Room |
Wednesday, June 22, 2016
Time |
Event |
Location |
|
SESSION 5: Interpretations/Philosophy |
|
9:00 – 9:45am |
Yakir Aharonov, Chapman University |
Bob Room |
9:45 – 10:30am |
Lajos Diosi, Wigner Research Centre for Physics |
Bob Room |
10:30 – 11:00am |
Coffee Break |
Bistro – 1st Floor |
11:00 – 11:45am |
Arun Pati, Harish-Chandra Research Institute |
Bob Room |
11:45 – 12:30pm |
Lev Vaidman, Tel Aviv University |
Bob Room |
12:30 – 2:00pm |
Lunch |
Bistro – 2nd Floor |
|
SESSION 6: Interpretations/Philosophy |
|
2:00 – 2:30pm |
Armen Gulian, Chapman University |
Bob Room |
2:30pm – 3:00pm |
Boris Braverman, Massachusetts Institute of Technology |
Bob Room |
3:00 – 3:30pm |
Coffee Break |
Bistro – 1st Floor |
3:30 – 4:00pm |
Kelvin McQueen, Tel Aviv University |
Bob Room |
4:00 – 4:30pm |
Matt Leifer, Chapman University |
Bob Room |
4:30 – 4:45pm |
Coffee Break |
Bistro – 1st Floor |
4:45 – 5:30pm |
Rob Spekkens, Perimeter Institute |
Bob Room |
Thursday, June 23, 2016
Time |
Event |
Location |
|
SESSION 7: General relativity/Cosmology |
|
9:00 – 9:45am |
Yakir Aharonov, Chapman University |
Bob Room |
9:45 – 10:30am |
Bill Unruh, University of British Columbia |
Bob Room |
10:30 – 11:00am |
Coffee Break |
Bistro – 1st Floor |
11:00 – 11:45am |
Neil Turok, Perimeter Institute |
Bob Room |
11:45 – 12:30pm |
Lee Smolin, Perimeter Institute |
Bob Room |
12:30 – 2:00pm |
Lunch |
Bistro – 2nd Floor |
|
SESSION 8: General relativity/Cosmology |
|
2:00 – 2:30pm |
Eli Cohen, University of Bristol |
Bob Room |
2:30pm – 3:00pm |
Ali Nayeri, Chapman University |
Bob Room |
3:00 – 3:30pm |
Coffee Break |
Bistro – 1st Floor |
3:30 – 4:00pm |
Juan Mauricio Torres, Darmstadt University of Technology |
Bob Room |
4:00 – 4:45pm |
David Albert, Columbia University |
Bob Room |
5:30 – 8:00pm |
Banquet |
Bistro – 2nd Floor |
Friday, June 24, 2016
Time |
Event |
Location |
|
SESSION 9: Implementations |
|
9:00 – 9:45am |
Yakir Aharonov, Chapman University |
Bob Room |
9:45 – 10:30am |
Yuji Hasegawa, Vienna University of Technology |
Bob Room |
10:30 – 11:00am |
Coffee Break |
Bistro – 1st Floor |
11:00 – 11:45am |
Yuval Gefen, Weizmann Institute |
Bob Room |
11:45 – 12:30pm |
Holger Hoffman, Hiroshima University |
Bob Room |
12:30 – 2:00pm |
Lunch |
Bistro – 2nd Floor |
|
SESSION 10: Applications |
|
2:00 – 2:30pm |
James Troupe, University of Texas |
Bob Room |
2:30pm – 3:00pm |
John Gray, Naval Surface Warfare Center, Dahlgren |
Bob Room |
3:00 – 3:30pm |
Coffee Break |
Bistro – 1st Floor |
3:30 – 4:00pm |
Lucien Hardy, Perimeter Institute |
Bob Room |
4:00 – 4:45pm |
Panel Discussion |
Bob Room |
4:45pm |
Good-bye |
Bob Room |
Yakir Aharonov, Chapman University
Finally making sense of Quantum Mechanics
Alonso Botero, Universidad de los Andes
Ubiquity of Weak Values
In this brief talk we will show how weak values appear in a wide range of physical contexts beyond the usual context of weak measurements. Among others, we will discuss how weak values appear in: the physics of classical parameters in a quantum evolution; the statistics of strong measurements; formulas for probability amplitudes in quantum mechanics; and finally, in the classical correspondence of quantum mechanics.
Boris Braverman, Massachusetts Institute of Technology
Our Quantum World, Contextuality, and Bohmian Mechanics
Our universe is at its heart quantum mechanical, yet classical behaviour is seen everywhere. I will discuss the scales that determine the quantum to classical transition and the prospects for the observation of ever more macroscopic quantum behaviour. I will then discuss how paradoxes in quantum mechanics can be understood and visualized with Bohmian trajectories, how these trajectories can be measured, and the implications for the ontology of the Bohmian picture.
Andrew Briggs, University of Oxford
The Unreasonable Effectiveness of Curiosity
Curiosity about how the world works can lead to beneficial progress in technology, and vice-versa. This kind of interplay can be found in quantum nanoscience, where foundationally motivated experiments and technologically motivated experiments often use similar materials and techniques, because both involve extending the realm of non-classical behaviour. At a higher level, curiosity about ultimate questions such as meaning and purpose can create an environment that is conducive to scientific breakthroughs, and many of the best minds in science have also been curious about deeper realities. Eugene Wigner described the miracle of the effectiveness of mathematics as a wonderful gift which we neither understand nor deserve. The same could be said of curiosity.
Roman Buniy, Chapman University
Higher order topological actions
In classical mechanics, an action is defined only modulo additive terms which do not modify the equations of motion; in certain cases, these terms are topological quantities. We construct an infinite sequence of higher order topological actions and argue that they play a role in quantum mechanics, and hence can be accessed experimentally.
Eli Cohen, University of Bristol
A Final Boundary Condition: Several Implications for the Universe
The state vector describing the physical situation of the magnetic A-B effect should depend upon all three quantizeable entities in the problem, the electron orbiting the solenoid, the moving charged particles in the solenoid and the vector potential. One may imagine three approximate solutions to the exact dynamics, where two of the three entities do not interact at all, and the third, quantized, entity interacts with a classical approximation. Thus, fifty-five years ago, A-B showed that, if the interaction is between the quantized electron current and the classical approximation to the solenoid’s vector potential, the state vector acquires a measurable phase shift. Four years ago Vaidman showed that, if the interaction is between the quantized solenoid current and the classical approximation to the electron’s vector potential, the state vector acquires the
A-B phase shift. I shall first show why these two results have to be the same. Then, I shall show that, if the interaction is between the quantized vector potential and the classical approximation to the electron and solenoid currents, the state vector acquires the A-B phase shift. Lastly, I shall show how to reconcile these three mathematically and conceptually different calculations.
Yutaka Shikano, Institute for Molecular Science, National Institutes of Natural Sciences
Observation of Aharonov-Bohm effect with quantum tunneling
Quantum tunneling is one such phenomenon that is essential for a number of devices that are now taken for granted. However, our understanding of quantum tunneling dynamics is far from complete, and there are still a number of theoretical and experimental challenges. The dynamics of the quantum tunneling process can be investigated if we can create a large tunneling region. We have achieved this using a linear Paul trap and a quantum tunneling rotor, which has resulted in the successful observation of the Aharonov–Bohm effect in tunneling particles. Also, this result shows that the spatially separated phonon can be interfered.
Aephraim Steinberg, University of Toronto
How to count one photon and get a(n average) result of 1000...
I will present our recent experimental work using electromagnetically induced transparency in laser-cooled atoms to measure the nonlinear phase shift created by a single post-selected photon, and its enhancement through "weak-value amplification." Put simply, due to the striking effects of "post-selective" quantum measurements, a (very uncertain) measurement of photon number can yield an average value much larger than one, even when it is carried out on a single photon. I will say a few words about possible practical applications of this "weak value amplification" scheme, and their limitations.
Time permitting, I will also describe other future and past work using "weak measurement," such as our studies quantifying the disturbance due to a measurement and what happens when it destroys interference; and our project to measure "where a particle has been" as it tunnels through a classically forbidden region – our prediction being that it will make it from one side of the barrier to the other without spending any significant time in the middle.
Juan Mauricio Torres, Darmstadt University of Technology
Atomic two-qubit quantum operations with ancillary multiphoton states
We propose and theoretically investigate the implementation of entangling operations on two two-level atoms using cavity-QED scenarios. The atoms interact with an optical cavity and their state is postselected in a noninvasive way by measuring the optical field after the interaction. We show that the resulting quantum operation can be exploited to implement an entanglement purification protocol, where a fidelity larger than one half with respect to any Bell state is not a necessary condition.
James Troupe, University of Texas
A Contextuality Based Quantum Key Distribution Protocol
In 2005 R. Spekkens presented a generalization of noncontextuality that applies to imperfect measurements (POVMs) by allowing the underlying ontological model to be indeterministic. Unlike traditional Bell-Kochen-Specker noncontextuality, ontological models of a single qubit were shown to be contextual under this definition. Recently, M. Pusey showed that, under certain conditions, exhibiting an anomalous weak value implies contextuality. We will present a single qubit prepare and measure QKD protocol that uses observation of anomalous weak values of particular observables to estimate the quantum channel error rate and certify the security of the channel. We will also argue that it is the “degree” of contextuality of the noisy qubits exiting the channel that fundamentally determine the secure key rate. A benefit of this approach is that the security does not depend on the fair sampling assumption, and so is not compromised by Eve controlling Bob’s measurement devices. Thus it retains much of the benefit of “Measurement Device Independent” QKD protocols while only using single photon preparation and measurement.
Lev Vaidman, Tel Aviv University
The meaning of weak values
The weak value, as an expectation value, requires an ensemble to be found. Nevertheless, we argue that the physical meaning of the weak value is much more close to the physical meaning of an eigenvalue than to the physical meaning of an expectation value. Theoretical analysis and experimental results performed in the MPQ laboratory of Harald Weinfurter are presented. Quantum systems described by numerically equal eigenvalue, weak value and expectation value cause identical average shift of an external system interacting with them during an infinitesimal time. However, there are differences between the final states of the external system. In the case of an eigenvalue, the shift is the only change in the wavefunction of the external system. In case of the expectation value, there is an additional change in the quantum state of the same order, while in the case of the weak value the additional distortion is negligible. The understanding of weak value as a property of a single system refutes recent claims that there exist classical statistical analogue to the weak value.
Bill Unruh, University of British Columbia
Quantum Mechanics is Not Non-Local
Bell's inequality is often stated as proving that quantum mechanics is non-local (rather than non-realistic, which apparently shows that physicists have more problems with non-realism than with non-locality). I will argue that the purpose of the use of locality in Bell's argument (in the CHSH form) is to make the classical system as close to the quantum system as possible, not to differentiate it from the quantum, and that non-realism is a more reasonable interpretation than is non-locality.
Panel Discussion
TBA
Some Implications of the Aharonov Ansatz to Sensing
There is a common framework for the measurement problem for sensors such as radars, sonars, and optics in a common language by casting analysis of signals in the language of quantum mechanics (Rigged Hilbert Space). The use of this language can reveal a more detailed understanding of the underlying interactions of a return signal that are not usually brought out by standard signal processing design techniques.
A Contextuality Based Quantum Key Distribution Protocol
In 2005 R. Spekkens presented a generalization of noncontextuality that applies to imperfect measurements (POVMs) by allowing the underlying ontological model to be indeterministic. Unlike traditional Bell-Kochen-Specker noncontextuality, ontological models of a single qubit were shown to be contextual under this definition. Recently, M. Pusey showed that, under certain conditions, exhibiting an anomalous weak value implies contextuality.
Why interactions matter: How the laws of dynamics determine the shape of physical reality
Measurements performed at variable strengths show that non-commuting physical properties are related by complex-valued statistics, where the complex phase expresses the action of transformations along orbits represented by the eigenstates. In strong measurements, the dynamics along the orbits is completely randomized, which means that the pure states prepared by such a measurement actually represent ergodic statistics where the coherence between components originates from quantum dynamics.
TBA
Quantum paradoxes emerging in matter-wave interferometer experiments
Peculiarities of quantum mechanical predictions on a fundamental level are investigated intensively in matter-wave optical setups; in particular, neutron interferometric strategy has been providing almost ideal experimental circumstances for experimental demonstrations of quantum effects. In this device quantum interference between beams spatially separated on a macroscopic scale is put on explicit view.
Finally making sense of Quantum Mechanics, part 5
TBA
Atomic two-qubit quantum operations with ancillary multiphoton states
We propose and theoretically investigate the implementation of entangling operations on two two-level atoms using cavity-QED scenarios. The atoms interact with an optical cavity and their state is postselected in a noninvasive way by measuring the optical field after the interaction. We show that the resulting quantum operation can be exploited to implement an entanglement purification protocol, where a fidelity larger than one half with respect to any Bell state is not a necessary condition.
Pages
Scientific Organizers:
- Yakir Aharonov, Chapman University
- Justin Dressel, Chapman University
- Lucien Hardy, Perimeter Institute
- Matthew Leifer, Chapman University
- Jeff Tollaksen, Chapman University