MSGID: 1:317/3 64a643a2   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    Finding the flux of quantum technology    
      
     Date:   
         July 5, 2023   
     Source:   
         University of Pittsburgh   
     Summary:   
         We interact with bits and bytes everyday -- whether that's through   
         sending a text message or receiving an email. There's also quantum   
         bits, or qubits, that have critical differences from common bits   
         and bytes.   
      
         These photons -- particles of light -- can carry quantum information   
         and offer exceptional capabilities that can't be achieved any   
         other way.   
      
         Unlike binary computing, where bits can only represent a 0 or 1,   
         qubit behavior exists in the realm of quantum mechanics. Through   
         "superpositioning," a qubit can represent a 0, a 1, or any   
         proportion between. This vastly increases a quantum computer's   
         processing speed compared to today's computers. Experts are now   
         investigating the inside of a quantum-dot-based light emitter.   
      
      
         Facebook Twitter Pinterest LinkedIN Email   
      
   ==========================================================================   
   FULL STORY   
   ==========================================================================   
   We interact with bits and bytes everyday -- whether that's through   
   sending a text message or receiving an email.   
      
   There's also quantum bits, or qubits, that have critical differences   
   from common bits and bytes. These photons -- particles of light --   
   can carry quantum information and offer exceptional capabilities that   
   can't be achieved any other way. Unlike binary computing, where bits can   
   only represent a 0 or 1, qubit behavior exists in the realm of quantum   
   mechanics. Through "superpositioning," a qubit can represent a 0, a 1,   
   or any proportion between. This vastly increases a quantum computer's   
   processing speed compared to today's computers.   
      
   "Learning about the capabilities of qubits has been a driving force for   
   the emerging field of quantum technologies, opening up new and unexplored   
   applications like quantum communication, computing and sensing," said   
   Hong Koo Kim, Professor of Electrical and Computer Engineering at the   
   University of Pittsburgh Swanson School of Engineering.   
      
   Quantum technologies are important for a number of fields, like for   
   banks protecting financial information or providing researchers with   
   the speed needed to mimic all aspects of chemistry. And through quantum   
   "entanglement," qubits could "communicate" across vast distances as a   
   single system. Kim and his graduate student, Yu Shi, made a discovery   
   that may help quantum technology take a quantum leap.   
      
   It begins with a single photon Photon-based quantum technologies rely   
   on single photon sources that can emit individual photons.   
      
   These single photons can be generated from nanometer scale semiconductors,   
   more commonly known as quantum dots. Similar to how microwave antennas   
   broadcast mobile phone signals, a quantum dot acts as an antenna that   
   radiates light.   
      
   "By performing rigorous analysis, we discovered that a quantum dot   
   emitter - - or a nanometer scale dipole antenna -- traps a large amount of   
   energy," Kim explained. "The outer regime operation of a dipole emitter   
   is well understood, but this is really the first time a dipole has been   
   studied on the inside."  Photons from those quantum dots come out with   
   handedness, like us a right- handed or left-handed person, and quantum   
   information is carried by this handedness of individual photons. As such,   
   sorting them out to different pathways is an important task for quantum   
   information processing. Kim's team has developed a new way of separating   
   differently-handed photons and efficiently harvesting them for further   
   processing down the road.   
      
   "The findings of this work are expected to contribute to developing   
   high-speed single photon sources, a critical component needed in quantum   
   photonics," Kim said.   
      
       * RELATED_TOPICS   
             o Matter_&_Energy   
                   # Quantum_Physics # Quantum_Computing # Physics #   
                   Spintronics   
             o Computers_&_Math   
                   # Quantum_Computers # Computers_and_Internet #   
                   Spintronics_Research # Hacking   
       * RELATED_TERMS   
             o Quantum_computer o Quantum_entanglement o Quantum_number   
             o Wave-particle_duality o Quantum_tunnelling o Quantum_dot o   
             Introduction_to_quantum_mechanics o Linus_Pauling   
      
   ==========================================================================   
      
    Print   
      
    Email   
      
    Share   
   ==========================================================================   
   ****** 1 ****** ***** 2 ***** **** 3 ****   
   *** 4 *** ** 5 ** Breaking this hour   
   ==========================================================================   
       * Why_Birds_Ancestors_Lived;_Other_Dinosaurs_Died *   
       Dissolving_Cardiac_Device_Treats_Heart_Disease *   
       Webb_Locates_Dust_Reservoirs_in_Two_Supernovae *   
       Earth_Formed_from_Dry,_Rocky_Building_Blocks *   
       Ancient_Volcanic_Activity_On_Moon's_Dark_Side *   
       Highly_Conductive_Metallic_Gel_for_3D_Printing *   
       Potent_Greenhouse_Gas_Could_Be_Abated_Today *   
       Polymer_Brains_for_Artificial_Neural_Networks *   
       Early_Apex_Predator_Sought_Soft_Over_...   
      
       * Time_in_Universe_Once_Flowed_Five_Times_Slower   
      
   Trending Topics this week   
   ==========================================================================   
   SPACE_&_TIME Black_Holes Astrophysics NASA MATTER_&_ENERGY Biochemistry   
   Optics Petroleum COMPUTERS_&_MATH Communications Educational_Technology   
   Computer_Modeling   
      
      
   ==========================================================================   
      
   Strange & Offbeat   
   ==========================================================================   
   SPACE_&_TIME   
   Quasar_'Clocks'_Show_Universe_Was_Five_Times_Slower_Soon_After_the_Big_Bang   
   First_'Ghost_Particle'_Image_of_Milky_Way   
   Gullies_on_Mars_Could_Have_Been_Formed_by_Recent_Periods_of_Liquid_Meltwater,   
   Study_Suggests MATTER_&_ENERGY   
   Researchers_Create_Highly_Conductive_Metallic_Gel_for_3D_Printing   
   Growing_Bio-Inspired_Polymer_Brains_for_Artificial_Neural_Networks   
   Displays_Controlled_by_Flexible_Fins_and_Liquid_Droplets_More_Versatile,   
   Efficient_Than_LED_Screens COMPUTERS_&_MATH   
   AI_Tests_Into_Top_1%_for_Original_Creative_Thinking   
   Turning_Old_Maps_Into_3D_Digital_Models_of_Lost_Neighborhoods   
   NeuWS_Camera_Answers_'Holy_Grail_Problem'_in_Optical_Imaging Story   
   Source: Materials provided by University_of_Pittsburgh. Note: Content   
   may be edited for style and length.   
      
      
   ==========================================================================   
   Journal Reference:   
      1. Yu Shi, Hong Koo Kim. Spin texture and chiral coupling of circularly   
         polarized dipole field. Nanophotonics, 2023; 12 (1): 129 DOI:   
         10.1515/ nanoph-2022-0581   
   ==========================================================================   
      
   Link to news story:   
   https://www.sciencedaily.com/releases/2023/07/230705143012.htm   
      
   --- up 1 year, 18 weeks, 2 days, 10 hours, 50 minutes   
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)   
   SEEN-BY: 15/0 106/201 114/705 123/120 153/7715 218/700 226/30 227/114   
   SEEN-BY: 229/110 112 113 307 317 400 426 428 470 664 700 291/111 292/854   
   SEEN-BY: 298/25 305/3 317/3 320/219 396/45 5075/35   
   PATH: 317/3 229/426