Session E02: General Theoretical & Computational

Demonstrating a Quantum Permutation Algorithm with Higher Qubit Near-term Intermediate Scale Quantum Processors

Quantum computation is an emerging field that harnesses quantum mechanical phenomena through the manipulation of qubits to execute operations. The way in which a qubit is manipulated, using quantum algorithms or step-by-step commands, change the state of the qubit and gives probabilities of a particular problem’s outcome. One example of a quantum algorithm for a such system is the quantum permutation algorithm, which determines the parity of a given cyclic permutation in a single measurement. The original quantum permutation algorithm uses a quantum Fourier transform and its universe to implement the algorithm.  Instead, it has been previously shown by Yalcinkaya and Gedik (2017) this algorithm can be optimized by minimizing the number of required quantum gates when implemented by substituting the quantum Fourier transform (QFT) and its inverse with simpler transformations. We are interested in extending this simpler implementation with higher qubit counts using cloud-accessible near-term mid-scale quantum processors through IBM Quantum Experience.  Using up to 5 qubits, we will construct circuits in Qiskit Qasm simulator and a series of NISQ hardware with various qubit mappings.  For each permutation, we built circuits that achieved 8192 times, while averaging each distribution over 5 samples by the processor, with a runtime of 1 minute or less. We found that with increasing qubit number the optimized QPA shows marked improvement over previous studies utilizing QFTs and further we present the resulting speed and accuracy required to run the algorithm on higher qubits. We hope to investigate ways to apply pulse-level control to this algorithm in the future to further demonstrate the quantum advantage using currently available NISQ hardware.

    

Approaches of Experimental Designs to test Light Speed Invariance to Observers

The principle of the constancy of the velocity of light, which stated that the light velocity is invariant to the motion of the emitter, was well established and proven by many experiments. Interestingly, the further assumption that the light velocity is also independent of the motion of the observer was, arguably, never proven conclusively by any experiment for more than a century. Since this is a key assumption of some fundamental physical theory, it created a century-old theoretic gap. The difficulty cited for designing such experiments is mostly referred to the concerns of time synchronization and time dilation during the measurement. This paper proposed an innovative approach that will mirror the same approach of testing the light-speed invariance to the emitters, i.e. directly test the synchrocity of the light traveling as to multiple moving sensors. By leveraging the well-established light-speed invariance to moving emitters as the reference alignment, the experiment is designed in such a way that the concerns of time synchronization and dilation can be avoided. Other approaches are also proposed, for example, the improvement of first approach by directly measuring light travel time with an interferometer; and testing the isotropy of the light speed  by measuring the “relativistic mass”, i.e. the inertia, of two high-speed particles moving at the same speed but in different directions. The experiment results, if positive, will conclusively close a century-old theoretic gap. Otherwise, it may imply a need for further investigation of the light-speed invariance to moving observers. For example, the Asymmetry Theory made its predictions of results for these experiments. Either way, the design and execution of these experiments will have significant importance.   

The Phase Diagram of BPS Black Holes in AdS5

Motivated by recent studies of supersymmetric black holes, we revisit the phase diagram of AdS black holes, whether BPS or not, with particular emphasis on the role of rotation. We develop BPS thermodynamics systematically and, in many explicit examples, we study its striking similarities with more familiar AdS black holes, as well as some differences. We highlight an important fugacity that preserves BPS saturation but is not captured by the supersymmetric index.   

Quantum entanglement and state decay measurement

Uncorrelated identical systems undergoing decay are the archetypal Poisson process, whose lifetime can only be determined with fractional uncertainty 1/sqrt(N) for N decays. A multipartite quantum system undergoing decay into a single channel spontaneously enters a series of superradiant states. We posit that the subsequent decay sequence of that system has a different variance, indicating that the entanglement in the superradiant states may lead to a more precise lifetime measurement. We summarize the results of our numerical tests of this hypothesis.    

Experimental and Numerical Investigations on Hemodynamic Characteristics in an Internal Cerebral Artery Sidewall Aneurysm Model using Non-Newtonian Blood Analogue Fluids

This study aimed to develop an experimentally validated computational fluid dynamics (CFD) model to study the hemodynamic characteristics in cerebral aneurysms (CAs) using non-Newtonian blood analogue fluids. Firstly, a pilot study was employed to compare the hemodynamic characteristics between Newtonian and non-Newtonian fluids in an internal cerebral artery sidewall aneurysm model. The simulation results showed that relatively significant differences can be observed between Newtonian and non-Newtonian fluids, with respect to instantaneous wall shear stress, time averaged wall shear stress and oscillatory shear index distributions on the aneurysmal wall. The different performances of hemodynamic parameters on the aneurysms can further affect the evaluations of the growth and rupture of existing aneurysms, and the generation probability and locations of small/secondary aneurysms. To validate abovementioned findings, several non-Newtonian blood analogue fluids were prepared to conduct particle image velocimetry measurements to quantify the flow filed characteristics in CAs. In our following study, the agreements between PIV measurements and numerical simulations in flow field quantifications will be compared to build an experimental validated CFD model with non-Newtonian blood analogue fluids. The developed model can be further employed to investigate the hemodynamic factors on the pathophysiology of cerebral aneurysms statistically.   

An intensity interferometry measurement of gamma Orionis (Bellatrix) with the VERITAS telescope array

In this talk, I will describe the measurement of the B2V star gam Ori at visible wavelengths (417nm) using the VERITAS Stellar Intensity Interferometer. During the bright-moon periods, Cherenkov observations at the VERITAS array are not feasible and intensity interferometry measurements take place as each of the four telescopes is instrumented with a single photomultiplier at the focal plane, digitized to 8-bits, and read out continuously at 250 MHZ. Offline, the recorded waveforms are correlated, revealing a small (~part per million) enhancement in the product of the currents for small relative time; this is the so-called Hanbury Brown-Twiss (HBT) effect. The size of the star may be extracted from the dependence of the correlation on telescope separation. In 2020-21, Bellatrix was observed for several hours, and its angular radius was extracted with this technique. I will discuss this preliminary radius measurement, along with the convolution technique and the removal of a sizable noise component, which are used to obtain this measurement.    

Theoretical Proof of Variation into the Speed of Light

In this Conference we are presenting  a disproof a very crucial and controversial statement given by a great physicist of all times in the history of mankind Albert Einstein that- "The speed of light is constant and the maximum speed in this Universe" or No Body can experience faster than this speed (c). Now we are presenting new version of this ideology by using the principle of "Causality" and the principle of "Central System Relativity". In this paper, we have proved that there does not exist light (as defined by Einstein) like thing, but all there exists in universe are broken parts (at different geometrical scales), because light exist on a particular geometrical scale as broken parts (at all type of geometrical scales) exist in N-Time Inflationary Model of Universe. The shorter geometry broken parts usually travels faster than the bigger one. We also Generalized the Causality Principle in terms of the principle of "Central Syatem Relativity" by Persenter Surendra Mund (Who Doveloped independently the Idea of N-Time Inflationary Model of Universe). So many physicists tried to prove Albert Einstien's wrong about his thought about Speed of Light but never got any solid proof against his theoretical perspective but this ideology, we are presenting, can change the face of physics in 21^th Centuary. In this abstract, we are just proving the Einstien's statement wrong in two different ways- 

1. The first one is by Variation in the speed of 'Broken Parts' (Light in atomic case etc) by variation into the scal;ar field density during a particular epoch.

2. The second one is the Variation in the speed of broken parts formed during different epochs of Universe.

In the end of presentation we will provide an experimental setup to prove this beautiful theoretical perspective as- "when we detect the variation into the speed of 'Gravitational Waves' on Mars and Earth, then it will be some difference between these two observed speeds of Graviational Waves."