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BEGIN:VEVENT
DTSTAMP:20200925T095641Z
LAST-MODIFIED:20191114T134404Z
DTSTART:20191211T203000Z
DTEND:20191211T220000Z
UID:event2232@bu.edu
URL:http://physics.bu.edu/events/show/2232
SUMMARY:Quantum simulation of high-energy physics - microscopic and macrosc
opic approaches
DESCRIPTION:Featuring Torsten Zache\, Heidelberg University\n\nPart of the
Condensed Matter Theory Seminar Series.\n\nThe unprecedented control of syn
thetic quantum systems allows to tackle outstanding questions from high-ene
rgy physics\, such as the non-equilibrium dynamics of gauge theories\, usin
g quantum simulators. In this talk\, I will first discuss dynamical topolog
ical transitions in quantum electrodynamics (QED) in one spatial dimension
[1]\, which bear similarities with the physics of topological insulators. T
his phenomenon is accessible within our proposals to microscopically engine
er the Hamiltonian of lattice QED with a mixture of ultracold gases [2]. Th
ese efforts recently resulted in a proof-of-principle experiment demonstrat
ing an elementary building block for U(1) lattice gauge theories [3]. In th
e second part of my talk\, I will discuss a complementary approach\, based
on large-scale analog quantum simulators probing the many-body limit descri
bed by quantum field theory (QFT). Within an equal-time formulation of QFT\
, we established a procedure to extract irreducible correlations\, enabling
the measurement of effective interaction vertices [4]. This is verified at
the example of the sine-Gordon model in thermal equilibrium\, quantum simu
lated by two tunnel-coupled superfluids. We further applied this approach t
o a spinor Bose gas out-of-equilibrium [5]\, revealing universal dynamics o
f an effective vertex in a regime where standard kinetic descriptions fail.
\n\n[1] Zache et al\, Phys. Rev. Lett. 122\, 050403\n[2] Zache et al\, Quan
tum Sci. Technol. 3 034010\n[3] Mil et al\, arXiv:1909.07641\n[4] Zache et
al\, arXiv:1909.12815\n[5] PrÃ¼fer et al\, arXiv:1909.05120
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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