Program
Full Program | Thursday | Friday | Saturday | All Sessions | Posters | Talks
SESSION 1: Loophole-free Bell test 1 (Pavilion I - III)Chair: Carlton Caves (New Mexico) | |
| 8:45 am - 9:30 am | Ronald Hanson, (TU Delft) From a loophole-free Bell test to a quantum Internet | Abstract. The realization of a highly connected network of qubit registers is a central challenge for quantum information processing and long-distance quantum communication. Diamond spins associated with NV centers are promising building blocks for such a network as they combine a coherent optical interface (similar to that of trapped atomic qubits) [1] with a local register of robust and well-controlled nuclear spin qubits [2]. We can now exploit these features simultaneously to achieve new functionalities such as unconditional remote quantum teleportation [3]. Here we present our latest progress towards scalable quantum networks, including the first loophole-free violation of Bell's inequalities [4]. References: [1] H. Bernien et al., Nature 497, 86 (2013). [2] T. H. Taminiau et al., Nature Nanotechnology 9, 171 (2014). [3] W. Pfaff et al., Science 345, 532 (2014). [4] B. Hensen et al., Nature 526, 682 (2015). |
| 9:30 am - 10:00 am | Morgan Mitchell, (ICFO) Random number generation for loophole free Bell tests | Abstract. The current generation of loophole-free Bell tests places stringent requirements on the methods for choosing "unpredictable" measurement settings, including very low excess predictability, generation in very short time windows, and statistical assurances very different from those typically used to characterize randomness sources, e.g. the NIST test suite. We show how these requirements have been met using a combination of ultra-fast phase-diffusion random number generators, purpose-built real-time randomness extraction, and novel statistical metrology. The approach produces bits traceable to spontaneous-emission events less than 28 ns in the past, with excess predictability (beyond the ideal 1/2) of less than 10e−4, both with strong metrological assurances. The approach has been employed in recent experiments closing the detection efficiency and communication loopholes, and addressing the freedom-of-choice loophole [Hensen et al. Nature 526, 682 (2015), Giustina et al. Phys. Rev. Lett. (Dec 2015), Shalm et al. Phys. Rev. Lett. (Dec 2015)]. We discuss the strategies for randomness generation in non-quantum theories and some significant deviations from "common wisdom" about randomness extraction that arise in the Bell test context. |
SQuInT Chief Organizer
Prof. Akimasa Miyake
amiyake@unm.edu
SQuInT Co-Organizer
Prof. Elohim Becerra
fbecerra@unm.edu
SQuInT Founder
Prof. Ivan Deutsch
ideutsch@unm.edu
SQuInT Administrator
Gloria Cordova
gjcordo1@unm.edu
505 277-1850
