COVID19 information for PI Residents and Visitors
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 – 1^{st} 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 – 2^{nd} 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 – 1^{st} 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 – 1^{st} Floor 
4:45 – 5:30pm 
Sir Anthony Leggett, University of Illinois at UrbanaChampaign 
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 – 1^{st} 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 – 2^{nd} 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 – 1^{st} 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 – 1^{st} 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 – 1^{st} Floor 
11:00 – 11:45am 
Arun Pati, HarishChandra Research Institute 
Bob Room 
11:45 – 12:30pm 
Lev Vaidman, Tel Aviv University 
Bob Room 
12:30 – 2:00pm 
Lunch 
Bistro – 2^{nd} 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 – 1^{st} 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 – 1^{st} 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 – 1^{st} 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 – 2^{nd} 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 – 1^{st} 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 – 2^{nd} 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 – 1^{st} 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 – 2^{nd} 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 – 1^{st} Floor 
3:30 – 4:00pm 
Lucien Hardy, Perimeter Institute 
Bob Room 
4:00 – 4:45pm 
Panel Discussion 
Bob Room 
4:45pm 
Goodbye 
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 viceversa. 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 nonclassical 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 AB 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, fiftyfive years ago, AB 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
AB 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 AB 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 AharonovBohm 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 lasercooled atoms to measure the nonlinear phase shift created by a single postselected photon, and its enhancement through "weakvalue amplification." Put simply, due to the striking effects of "postselective" 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 twoqubit quantum operations with ancillary multiphoton states
We propose and theoretically investigate the implementation of entangling operations on two twolevel atoms using cavityQED 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 BellKochenSpecker 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 NonLocal
Bell's inequality is often stated as proving that quantum mechanics is nonlocal (rather than nonrealistic, which apparently shows that physicists have more problems with nonrealism than with nonlocality). 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 nonrealism is a more reasonable interpretation than is nonlocality.
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.
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 BellKochenSpecker 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.
Measurements performed at variable strengths show that noncommuting physical properties are related by complexvalued 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.
Peculiarities of quantum mechanical predictions on a fundamental level are investigated intensively in matterwave 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.
We propose and theoretically investigate the implementation of entangling operations on two twolevel atoms using cavityQED 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.
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