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