MSGID: 1:317/3 64475763
PID: hpt/lnx 1.9.0-cur 2019-01-08
TID: hpt/lnx 1.9.0-cur 2019-01-08
 Scientists have full state of a quantum liquid down cold 
 New research, using ultracold atoms, reveals particular properties of
quantum systems 

  Date:
      April 24, 2023
  Source:
      New York University
  Summary:
      A team of physicists has illuminated certain properties of quantum
      systems by observing how their fluctuations spread over time. The
      research offers an intricate understanding of a complex phenomenon
      that is foundational to quantum computing.


      Facebook Twitter Pinterest LinkedIN Email

==========================================================================
FULL STORY
==========================================================================
A team of physicists has illuminated certain properties of quantum systems
by observing how their fluctuations spread over time. The research offers
an intricate understanding of a complex phenomenon that is foundational
to quantum computing -- a method that can perform certain calculations
significantly more efficiently than conventional computing.

"In an era of quantum computing it's vital to generate a precise
characterization of the systems we are building," explains Dries Sels, an
assistant professor in New York University's Department of Physics and an
author of the paper, which appears in the journal Nature Physics. "This
work reconstructs the full state of a quantum liquid, consistent with
the predictions of a quantum field theory -- similar to those that
describe the fundamental particles in our universe."  Sels adds that
the breakthrough offers promise for technological advancement.

"Quantum computing relies on the ability to generate entanglement
between different subsystems, and that's exactly what we can probe with
our method," he notes. "The ability to do such precise characterization
could also lead to better quantum sensors -- another application area of
quantum technologies."  The research team, which included scientists from
Vienna University of Technology, ETH Zurich, Free University of Berlin,
and the Max-Planck Institute of Quantum Optics, performed a tomography
of a quantum system -- the reconstruction of a specific quantum state
with the aim of seeking experimental evidence of a theory.

The studied quantum system consisted of ultracold atoms -- slow-moving
atoms that make the movement easier to analyze because of their near-zero
temperature -- trapped on an atom chip.

In their work, the scientists created two "copies" of this quantum system
- - cigar-shaped clouds of atoms that evolve over time without influencing
each other. At different stages of this process, the team performed a
series of experiments that revealed the two copies' correlations.

"By constructing an entire history of these correlations, we can
infer what is the initial quantum state of the system and extract
its properties," explains Sels. "Initially, we have a very strongly
coupled quantum liquid, which we split into two so that it evolves as
two independent liquids, and then we recombine it to reveal the ripples
that are in the liquid.

"It's like watching the ripples in a pond after throwing a rock in
it and inferring the properties of the rock, such as its size, shape,
and weight."  This research was supported by grants from the Air Force
Office of Scientific Research (FA9550-21-1-0236) and the U.S. Army
Research Office (W911NF-20-1- 0163) as well as the Austrian Science Fund
(FWF) and the German Research Research Foundation (DRG).

    * RELATED_TOPICS
          o Matter_&_Energy
                # Physics # Quantum_Physics # Quantum_Computing #
                Spintronics
          o Computers_&_Math
                # Quantum_Computers # Computers_and_Internet #
                Spintronics_Research # Encryption
    * RELATED_TERMS
          o Quantum_entanglement o Quantum_computer o Quantum_number o
          Electron_configuration o Supercomputer o Wave-particle_duality
          o Physics o John_von_Neumann

==========================================================================
Story Source: Materials provided by New_York_University. Note: Content
may be edited for style and length.


==========================================================================
Journal Reference:
   1. Mohammadamin Tajik, Ivan Kukuljan, Spyros Sotiriadis, Bernhard
   Rauer,
      Thomas Schweigler, Federica Cataldini, Joa~o Sabino, Frederik
      Mo/ller, Philipp Schu"ttelkopf, Si-Cong Ji, Dries Sels, Eugene
      Demler, Jo"rg Schmiedmayer. Verification of the area law of mutual
      information in a quantum field simulator. Nature Physics, 2023;
      DOI: 10.1038/s41567-023- 02027-1
==========================================================================

Link to news story:
https://www.sciencedaily.com/releases/2023/04/230424133553.htm

--- up 1 year, 8 weeks, 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: 229/110 112 113 307 317 400 426 428 470 664 700 292/854 298/25
SEEN-BY: 305/3 317/3 320/219 396/45
PATH: 317/3 229/426