QUANTUM PHYSICS BY- AHRAZ, ABHYUDAI AND AKSHAY LECTURE SECTION-5 GROUP NO. 6

WHAT IS QUANTUM PHYSICS ? Quantum physics (or quantum theory), including quantum field theory, is a fundamental branch of physics concerned with processes involving atoms and photons. Important applications of quantum mechanical theory include superconducting magnets, LEDs and the laser, the transistor and semiconductors such as the microprocessor, medical and research imaging such as MRI and electron microscopy, and explanations for many biological and physical phenomena.

QUANTUM FIELD THEORY Mathematical and conceptual framework for constructing quantum mechanical models of subatomic particles and quasi particles in condensed matter physics. Quantum mechanical interactions between particles are described by interaction terms between the corresponding underlying fields.

APPLICATIONS OF QUANTUM FIELD THEORY QFT methods apply to strongly correlated conductors, standard BCS-like superconductors and high-Tc superconductors. Secure Communications - Quantum key distribution 1D fermions - Concept used in Luttinger Liquid physics. Appears in many systems like carbon nanotubes, semiconducting quasi 1D wires,etc.

QUANTUM SENSING

SUPERSYMMETRY IN QUANTUM MECHANICS Supersymmetry (SUSY), a theory of particle physics, is a proposed type of space-time symmetry that relates to two basic classes of elementary particles: bosons, which have an integer valued spin, and fermions, which have half integer spin. Each particle from one group is associated with a particle from another, known as superpartner, the spin of which differs by a half integer.

APPLICATIONS OF SUPERSYMMETRY Supersymmetric quantum mechanics adds the SUSY super algebra to quantum mechanics as opposed to quantum field theory. Applications to condensed matter physics: SUSY concepts have provided useful extensions to the WKB approximation. Supersymmetry is also used in optics. Use in mathematics: SUSY is also studied mathematically for its intrinsic properties.

QUANTUM COMPUTING

INTRODUCTION Quantum Computing studies theoretical computation systems that make direct use of quantum-mechanical phenomenon, such as superposition and entanglement, to perform operations on data. Quantum Computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits(bits), each of which is always in one of the two definite states(either 0 or 1), quantum computation uses quantum bits (qubits), which can be superposition of states.

EVOLUTION OF IDEA OF QUANTUM COMPUTING

BITS VS. QUBITS A classical computer has memory made up of bits, where each bit represents either 1 or 0. A quantum computer maintains a sequence of qubits, which can represent a one, a zero or any quantum superposition of those two qubit states.

CONCLUSION Quantum Field Theory and Supersymmetry principles are applied in superconductors. The best possible application of quantum physics in engineering field in future could be use of superconductors in quantum computers. This will not only ensure better and efficient performance of the device but also conserve energy.