Home > Press > Analogue quantum computers: Still wishful thinking? Many challenges lie ahead before quantum annealing, the analogue version of quantum computation, contributes to solve combinatorial optimisation problems
Abstract:
Traditional computational tools are simply not powerful enough to solve some complex optimisation problems, like, for example, protein folding. Quantum annealing, a potentially successful implementation of analogue quantum computing, would bring about an ultra-performant computational method. A series of reviews in this topical issue of EPJ ST, guest-edited by Sei Suzuki from Saitama Medical University, Japan, and Arnab Das from the Indian Association for the Cultivation of Science, Kolkota, India, focuses on the state of the art and challenges in quantum annealing. This approach, if proven viable, could greatly boost the capabilities of large-scale simulations and revolutionise several research fields, from biology to economics, medicine and material science.
A Canadian company called D-Wave has been commercialising what it claims are two quantum annealers of 100 qubits, since 2011, and 500 qubits, since 2013. "Unlike a bit in a traditional computer, which can take values either 0 OR 1, a quantum bit (qubit) in a quantum computer can take values which are superimpositions of 0 AND 1, like a switch in a state of being on and off simultaneously," explains Das.
The trouble, Suzuki explains, is that "computation using the quantum mechanics is technically difficult and was thought to be unrealistic until recently." Before the advent of the D-Wave machines, realising and manipulating such a superimposed state in real hardware beyond the size of a few (< 10) qubits seemed to be a daunting task. Interaction with the environment rapidly decays such strange superposition states into ordinary 0 OR 1 states, according to Das. As Suzuki notes: "This is because of the insufficiency of techniques that control and protect microscopic elements against disturbances."
There have been speculations from the science community as to whether the D-Wave technology actually delivers quantum annealing. "The reviews of our latest issue show that the performances of the D-Wave machines as quantum computers, while noteworthy, have remained essentially inconclusive," explains Das, "and scientists have not been able to definitively ascertain that such a device qualifies as a true quantum object."
###
References:
S. Suzuki and A. Das (2015), Quo Vadis quantum annealing?, European Physical Journal Special Topics 224/1, DOI: 10.1140/epjst/e2015-02337-1
A. Das and S. Suzuki (2015), Debate and discussion: Quo Vadis quantum annealing?, European Physical Journal Special Topics 224/1, DOI: 10.1140/epjst/e2015-02351-3
####
For more information, please click here
Contacts:
Joan Robinson
49-622-148-78130
Copyright © Springer
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Related News Press |
Chip Technology
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Utilizing palladium for addressing contact issues of buried oxide thin film transistors April 5th, 2024
HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024
Quantum Computing
Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
With VECSELs towards the quantum internet Fraunhofer: IAF achieves record output power with VECSEL for quantum frequency converters April 5th, 2024
Chemical reactions can scramble quantum information as well as black holes April 5th, 2024
Announcements
NRL charters Navy’s quantum inertial navigation path to reduce drift April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Simulating magnetization in a Heisenberg quantum spin chain April 5th, 2024
Discovery points path to flash-like memory for storing qubits: Rice find could hasten development of nonvolatile quantum memory April 5th, 2024
The latest news from around the world, FREE | ||
Premium Products | ||
Only the news you want to read!
Learn More |
||
Full-service, expert consulting
Learn More |
||