A5101820169- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Quantum Information and Cryptography
- Quantum-Dot Cellular Automata
- Quantum Electrodynamics and Casimir Effect
- Quantum many-body systems
- Phase Equilibria and Thermodynamics
- Spectroscopy and Quantum Chemical Studies
- Origins and Evolution of Life
- Computational Physics and Python Applications
- Parallel Computing and Optimization Techniques
- Thermal Radiation and Cooling Technologies
Tafresh University
2024
Sharif University of Technology
2018-2023
Institute for Research in Fundamental Sciences
2018-2020
Quantum detailed balance conditions and quantum fluctuation relations are two important concepts in the dynamics of open systems: both concern how such systems behave when they thermalize because interaction with an environment. We prove that for thermalizing yield validity a relation (where only forward-time is considered). This implies to have (which turn enables precise formulation second law thermodynamics systems) it suffices fulfill conditions. We, however, show converse not...
A fluctuation relation for the heat exchange of an open quantum system under a thermalizing Markovian dynamics is derived. We show that probability absorbs amount from its bath, at given time interval, divided by reverse process (releasing same to bath) exponential factor which depends on and difference between temperatures bath. also argue violation second law thermodynamics (here in form net transfer cold hot drops exponentially with both temperature differences.
We extend on ideas from standard thermodynamics to show that temperature can be assigned a general nonequilibrium quantum system. By choosing physically motivated complete set of observables and expanding the system state thereupon, one read relevant, independent thermodynamic variables which include internal energy. This expansion allows us as partial derivative von Neumann entropy with respect this definition is parameters unambiguously describing state. It has appealing features such...
The problem of efficient multiplication large numbers has been a long-standing challenge in classical computation and extensively studied for centuries. It appears that the existing algorithms are close to their theoretical limit offer little room further enhancement. However, with advent quantum computers need can perform on hardware, new paradigm emerges. In this paper, inspired by convolution theorem amplitude amplification we propose algorithm integer time complexity...
In our pursuit of quantum supremacy during the NISQ era, this research introduces a novel approach rooted in Quantum Approximate Optimization Algorithm (QAOA) framework to address Traveling Salesman Problem (TSP). By strategically reducing requisite qubit count from $n^2$ $n\log_{2} (n)$, QAOA-based algorithm not only contributes ongoing discourse on efficiency but also demonstrates improved performance based established metrics, underscoring its potential for achieving NISQ-era solving...
Transmission efficiency (TE) of remote state preparation (RSP) with a shared quantum and one bit classical communication is considered. Following [B. Daki et al., Nat. Phys. 8, 666 (2012)], the encoding decoding strategies protocol are restricted to physically relevant classes projective measurements unitary operators, respectively. It shown that contrary previous arguments, quadratic fidelity as well linear could be valid figure merit quantify TE RSP. Then, in terms both fidelities...
The problem of efficient multiplication large numbers has been a long-standing challenge in classical computation and extensively studied for centuries. It appears that the existing algorithms are close to their theoretical limit offer little room further enhancement. However, with advent quantum computers need can perform on hardware, new paradigm emerges. In this paper, inspired by convolution theorem amplitude amplification we propose integer time complexity $O(\sqrt{n}\log^2 n)$ which...
Continuous clocks, i.e. the clocks that measure time in a continuous manner, are regarded as an essential component of sensing technology. Precision and recurrence two basic features clocks. In this paper, framework quantum estimation theory various models for proposed, where all tools employed to seek characteristics with high precision long time. Then, resource-based approach, performance proposed is compared. It shown based on $n$ two-qubits system not only can have better than $2n$...