Scientific Program

Conference Series LLC Ltd invites all the participants across the globe to attend 3rd International Conference on Quantum Optics and Quantum Computing London, UK.

Day 1 :

Quantum Optics 2018 International Conference Keynote Speaker Ling Hao photo
Biography:

Ling Hao is a Principal Research Scientist in the Quantum Metrology Institute and National Graphene Metrology Centre at the UK’s National Physical Laboratory (NPL). She is a Fellow of the Institute of Physics, Chartered Physicist and a Visiting Professor at Imperial College London, Fudan University (Shanghai) and Harbin Institute of Technology, China. She has published more than 180 research papers in refereed journals as well as fi ve book chapters. She is working on applications of quantum science, nanoscience, superconducting electronics and microwave technology for quantum metrology and technology and precision measurements, aimed at single particle measurements and quantum sensor and metrology with nanoSQUIDs, nanoelectromechanical system (NEMS) resonators and high Q microwave resonators; also on transport measurements and applications of quantum materials (graphene, other 2D materials and carbon nanotubes).

Abstract:

SQUIDs (superconducting quantum interference devices) have been in use for more than half a century and constitute one of the first macroscopic quantum devices. SQUIDs operating at millikelvin temperatures can act as qubits for quantum computers and the recent reports of more than 50 qubit circuits indicate how far the technology has developed. In this talk, the author will describe two other applications of SQUIDs as quantum detectors, focusing on single spin and single photon energy resolving detection. Most superconducting devices rely on tri-layer Josephson tunnel junctions which are not easily scalable to the nanoscale. We have developed a Josephson junction fabrication method, based on electron beam lithography or focused ion beam milling of a single thin fi lm of superconductor (Nb generally) which can provide sizes down to 50 nm. Th ese devices are particularly relevant for two main applications in quantum technology and metrology. First, by shrinking the size of the SQUID loop and the junctions to around
200 nm, the sensitivity of the SQUID for magnetization measurements is improved to the level where a single electron spin fl ip may be detected. Th is is possible at the relatively elevated temperature of 4K. We are working with Surrey University to implant single magnetic ions within the SQUID loop to provide a platform to test this combination as the basis for a new form of qubit operating at higher temperatures than the conventional Transmon superconducting devices. A second SQUID based detector which we are developing is an inductive transition edge sensor device (ISTED) for energy resolving measurements of single photons. Th is is based
on the development of conventional transition edge sensors where we detect the change of the penetration depth of a small thin fi lm
of superconductor when it absorbs a photon. In this way, a major source of noise in conventional TES may be avoided since the absorber remains in the superconducting state at all times. In this way we have demonstrated single photon detection at 633 nm with
0.1eV resolution at operating temperature of 7.5K.

 

Keynote Forum

Mark G Frank

State University of New York, USA

Keynote: Preliminary test of electron spin and muscle resistance
Quantum Optics 2018 International Conference Keynote Speaker Mark G Frank photo
Biography:

Mark G. Frank is a Professor and Chair of the Communication Department at the University at Buffalo, State University of New York who works in Nonverbal Communication.

Abstract:

In a previous theoretical work, based on quantum fi eld theory by Verzegnassi, Germano & Kurian, 2018, it has been shown that
the energetic eff ect of a magnetic fi eld on a system of free electrons depends linearly on the product of the polarity of the fi eld
with an intrinsic helicity spin property of the electron. We tested this through measuring the eff ect of diff erent magnet polarities
upon muscle resistance to force. Th irty-nine participants were requested to resist a downward force applied to their outstretched
dominant arm, via a device designed to eliminate direct contact with the participant and to assess the specifi c force required to move
participants’ arms downward past a pre-determined point. Th e experimenter fi rst measured the resistance without any magnetic
charge, then placed a magnet of either positive or negative polarity (determined randomly) on the deltoid muscle and re-applied
the force upon the arm. Th en the experimenter reversed the magnet and reapplied the force for a third time. Th e duration and peak
force were measured. Th e results showed a signifi cant quadratic eff ect compared to baseline, a positive charge showed a signifi cant
increase in force required to move the arm, whereas a negative charge showed a signifi cant decrease in force required to move the
arm. Reversing the polarity reversed the force required, but not signifi cantly. Th ese results suggest that there might exist a property
of the muscles, analogous to that of free electrons, of absorbing from a magnetic fi eld an energy of a sign fi xed by the polarity of the
fi eld and possibly by an extra intrinsic spin dependent property of the muscles. If this assumption was correct, one would conclude
that this intrinsic spin dependent property of the 39 participants should be the same. Our next experiment will investigate this
assumption.

Quantum Optics 2018 International Conference Keynote Speaker Claudio Verzegnassi photo
Biography:

Claudio Verzegnassi was a Professor Emeritus at Udine University in Trieste, Italy who works in theoretical physics.

Abstract:

The eff ects of a magnetic fi eld on energy and chirality of free electrons are computed in the quantum fi eld theory framework. For weak constant classical magnetic fi elds, the eff ects are fi xed by a special intrinsic property of the electron defi ned by us and called Chirality Index. We study these eff ects for a special electron state. The magnetic fi eld changes both energy and chirality with a linear dependence on the Chirality Index. It changes also the Chirality index in a simple way. Two experimental measurements are proposed to verify the theoretical predictions. The first experiment that measures an energy shift on human muscles has already a number of results. Th e second experiment on EZ free electrons is proposed as a realistic future test. Th e relevance of a possible magnetic modifi cation of the Chirality Index is fi nally considered.