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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20200401T023924Z
LAST-MODIFIED:20200319T130853Z
DTSTART:20200320T140000Z
DTEND:20200320T150000Z
UID:event2316@bu.edu
URL:http://physics.bu.edu/events/show/2316
SUMMARY:Nonuniversal entanglement level statistics in projection-driven qua
ntum circuits
DESCRIPTION:Featuring Lei Zhang\, Boston University\, Physics Department\n\
nPart of the Departmental Seminars.\n\nWe study the level-spacing statistic
s in the entanglement spectrum of\noutput states of random universal quantu
m circuits where qubits are\nsubject to a finite probability of projection
to the computational\nbasis at each time step. We encounter two phase trans
itions with\nincreasing projection rate: The first is the volume-to-area la
w\ntransition observed in quantum circuits with projective\nmeasurements; T
he second separates the pure Poisson level statistics\nphase at large proje
ctive measurement rates from a regime of residual\nlevel repulsion in the e
ntanglement spectrum within the area-law\nphase\, characterized by non-univ
ersal level spacing statistics that\ninterpolates between the Wigner-Dyson
and Poisson distributions. By\napplying a tensor network contraction algori
thm \nto the circuit spacetime\, we identify this second\nprojective-measur
ement-driven transition as a percolation transition\nof entangled bonds. Th
e same behavior is observed in both circuits of\nrandom two-qubit unitaries
and circuits of universal gate sets\,\nincluding the set implemented by Go
ogle in its Sycamore circuits.\n\nDissertation Committee: A. E. Ruckenstein
\, C. Chamon\, M. El-Batanouny\, R. Brower (ECE)\n\nLink of Zoom Seminar Ev
ent: https://bostonu.zoom.us/j/957452767
LOCATION: Virtual\, \,
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20200401T023924Z
LAST-MODIFIED:20200320T160949Z
DTSTART:20200325T180000Z
DTEND:20200325T190000Z
UID:event2318@bu.edu
URL:http://physics.bu.edu/events/show/2318
SUMMARY:Solving Strongly Coupled Quantum Field Theory - Part 1
DESCRIPTION:Featuring Yuan Xin\, Boston University\, Physics Department\n\n
Part of the Departmental Seminars.\n\nThis is the part 1 of two subsequent
presentations. I will focus on introducing the method and discussing a simp
le application on 2D real scalar theory.\n\nQuantum Field Theory is the lan
guage that describes a wide spectrum of physics\, from the fundamental matt
ers and interactions down to the phase transition of water. However\, it is
notoriously hard at strong coupling regime. In this talk I will approach t
his question in an old Quantum Mechanical method - keep a finite number of
states and diagonalize the Hamiltonian as a finite-size matrix - with our r
ecent setup\, known as the Lightcone Conformal Truncation. I will present i
ts applications in various two dimensional examples.\n\nCommittee: Fitzpatr
ick\, Katz\, Laumann\, Sushkov\, Polkovnikov\n\nTopic: Departmental Seminar
of Yuan Xin\nTime: Mar 25\, 2020 02:00 PM Eastern Time (US and Canada)\n\n
Join Zoom Meeting\nhttps://bostonu.zoom.us/j/516244667\n\nMeeting ID: 516 2
44 667
LOCATION: \, \,
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20200401T023924Z
LAST-MODIFIED:20200326T135525Z
DTSTART:20200406T183000Z
DTEND:20200406T193000Z
UID:event2324@bu.edu
URL:http://physics.bu.edu/events/show/2324
SUMMARY:Eco-evolutionary dynamics of microbial populations with heterogeneo
us growth and dispersal
DESCRIPTION:Featuring Ashish Bino George\, Boston University\, Physics Depa
rtment\n\nPart of the Departmental Seminars.\n\n
LOCATION: \, \,
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
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