Psiket Webinars

This talk explores the major frontiers of the Second Quantum Revolution from a quantum hardware perspective, focusing on how the future of quantum technologies will be shaped. I present a forward-looking view of how the three foundational pillars—quantum computation, quantum communication, and quantum sensing—are co-evolving toward scalable and practically deployable quantum infrastructures. Within this framework, I highlight selected examples from my own work, including spin–photon interfaces in silicon for scalable quantum computing architectures and quantum networking, erbium-doped nanoparticle single-photon sources for telecom-band quantum communication, and a levitated superconducting particle coupled to a superconducting qubit as a platform for macroscopic quantum control and ultra-sensitive quantum sensing.

Reducing the number of assumptions in an axiomatic theory is a natural route toward constructing more general frameworks. Historically, the discovery of non-Euclidean geometries provides a well-known example of this approach. Recently, we have applied this strategy to quantum mechanics by abandoning the assumption that the position of a particle must be described by a strictly self-adjoint operator. The remaining principles of quantum theory, together with Galilean symmetry, lead to a generalized quantum framework characterized by a single free parameter with the dimension of length. This mathematical structure preserves Galilean invariance and gives rise to a generalized uncertainty relation that guarantees the existence of a minimal length—an expectation shared by several approaches to quantum gravity. Remarkably, this non-Heisenberg quantum theory yields, without assuming any *a priori* commutation relations, a modified Heisenberg-type uncertainty relation of the form [ \Delta x , \Delta p \geq \sqrt{\frac{\hbar^2}{4} + l_0^2 (\Delta p)^2}, ] which explicitly implies a minimum position uncertainty equal to ( l_0 ). In the limit ( l_0 \to 0 ), the theory smoothly reduces to standard quantum mechanics. By comparing the predictions of this framework with observational data—including the first longitudinal normal modes of the resonant-bar gravitational wave detector **AURIGA** and the (1S!-!2S) transition in hydrogen—we derive upper bounds on the value of the length parameter ( l_0 ).

Thermodynamics holds a very unique and complex position among the branches of physics. In this lecture, after exploring some historical and conceptual aspects, we will discuss how fundamental research in thermodynamics may lead to significant advancements in physics. These advancements could range from theoretical aspects of physics, such as quantum gravity, to complex quantum technologies in the modern era.

In this talk, we begin by introducing a general framework for quantifying the intrinsic quantum randomness. This framework allows us to compute the maximum guessing power of an eavesdropper, while fully accounting for the possibility that they may share classical or quantum correlations with the input state or even with the measurement itself. We then compute the intrinsic randomness of a mixed state and identify the measurements that optimize this quantity. Next, we derive the randomness generated by noisy measurements, along with the corresponding optimal states. Finally, we show that the simultaneous presence of noise in both the state and the measurement can significantly enhance the eavesdropper’s ability to guess the outcomes.

A quantum computer serves as a platform for executing quantum algorithms that exhibit significant advantages over classical computational methods in solving certain problems. Among the various proposed physical implementations, photonic technology has emerged as a strategic pathway toward achieving universal quantum processors, thanks to its inherent compatibility with quantum communication and sensing systems. In the field of photonic quantum computing, two promising approaches have attracted particular attention: the continuous-variable (CV) approach, which operates based on the measurement-based computational model, and the single-photon approach, which utilizes the fusion-based computational model. This talk will explore the physical and computational principles underlying each of these approaches, highlighting their strengths, implementation challenges, and scalability potential within photonic platforms. The goal of this presentation is to provide a comprehensive overview of the diverse development pathways for photonic quantum computing systems and to outline the future prospects of this transformative technology.

In this webinar, Dr. Morteza Moradi discusses the topic “Quantum Channels and How to Retrieve Information After Passing Through Them.” The subject of the webinar is related to quantum communications, providing a general introduction to quantum channels. If you are interested in quantum communication and quantum cryptography, this webinar is for you.

Although quantum cryptography offers extremely high security, it still faces two major challenges: transmission distance and quantum key rate. To improve this technology, we must employ powerful theoretical and computational tools—one of which is tensor networks, particularly the Multi-scale Entanglement Renormalization Ansatz (MERA) architecture. MERA provides an efficient structure for the optimal encoding of quantum states of matter, especially in critical states. In this seminar, we will demonstrate how MERA can serve as a novel mathematical and algorithmic language, opening new horizons in quantum cryptography. Finally, we will discuss the role of trapped-ion systems as one of the leading experimental platforms for implementing such networks.

The wave–particle duality is a concept in quantum mechanics that states that the fundamental entities of the universe, such as photons and electrons, exhibit either particle-like or wave-like properties depending on experimental conditions. In the early twentieth century, it was discovered that light behaves as a wave, and later it was found to display particle-like behavior. Meanwhile, electrons, which initially appeared to act as particles in early experiments, were later shown to exhibit wave-like properties. What single identity can be conceived for matter?

استاد این وبینار توسط جناب آقای دکتر ابوالحسن واعظی،  دکتری فیزیک دانشگاه ام‌آی‌تی و برنده جایزه‌ تحصیلی وایتمن، استاد و عضو هیئت علمی دانشکده فیزیک دانشگاه صنعتی شریف و پژوهشگر در دانشگاه استنفورد آمریکا، برنده جایزه پژوهشی دانشگاه کورنل و استنفورد آمریکا و پژوهشگر برتر کشور سال ۱۴۰۰ارائه می‌شود. با ما همراه باشید و این وبینار جذاب را از دست ندهید.