Dr. David Wineland, National Institute of Standards and Technology
Dr. David Wineland, National Institute of Standards and Technology
Dirk Englund, Columbia University
Leonardo Neves
In this seminar we will address some measurement strategies for extracting information carried by single photons transmitted through a multi-slit array, the so-called spatial qudits. The focus will be on the methods to implement projective-like measurements and positive operator valued measurements. Applications in quantum state tomography and quantum state discrimination will be discussed.
Matteo Mariantoni, University of California, Santa Barbara
Superconducting quantum circuits have made significant advances over the past decade, allowing more complex and integrated circuits that perform with good fidelity. We have recently implemented a machine comprising seven quantum channels, with three superconducting resonators, two phase qubits, and two zeroing registers.
Tim Ralph, University of Queensland
The role of time in relativistic quantum information science is attracting increasing interest. I will discuss two new results: entanglement between the future and the past; and progress towards a consistent quantum field theory for closed timelike curves.
Steven Olmschenk, University of Maryland
Andrew Houck, Princeton University
Michal Bajcsy, Stanford University
Rajamani Vijayaraghavan, Berkeley
How does a quantum system evolve during measurement? The textbook picture of instantaneous, projective measurements only describes the situation before and after, but since any realistic experiment takes a finite amount of time, it is natural to talk about the evolution during the process. Surprisingly, using weak measurements it is possible to completely determine the evolution of the quantum state and look inside the so-called wavefunction collapse.