State of the Department at University of Wisconsin-Madison Department of Physics, Study notes of Quantum Mechanics

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UNIVERSITY OF WISCONSIN–MADISON

Department of Physics

• State of the Department

UNIVERSITY OF WISCONSIN–MADISON

State of the Department?

Obviously, the state of the department is GREAT!

9/8/18 University of Wisconsin–Madison 2

Frankly, I do not really know L

We are a big group of people! UNIVERSITY OF WISCONSIN–MADISON

9/8/18 University of Wisconsin–Madison 4

We are a big group of people! UNIVERSITY OF WISCONSIN–MADISON

9/8/18 University of Wisconsin–Madison 5

We are a big group of people! UNIVERSITY OF WISCONSIN–MADISON

9/8/18 University of Wisconsin–Madison 7

People Count! UNIVERSITY OF WISCONSIN–MADISON

Role Count Non-major UG Students Served (<300-level) 2867 Physics Majors (Including AMEP, AP, double majors) ~ Graduate Students ~ Non-faculty Research Staff ~ Faculty 44. Non-faculty Teaching Staff 11 Technical Staff 11 Administrative Staff 7 Emeritus Faculty 26 Affiliated Faculty 10 Total (Excluding Service course UGs) ~3400 (~500) 9/8/18 University of Wisconsin–Madison 8 I certainly can’t keep track of what 500 people are up to – some times I have trouble keeping track of what I am doing myself! We do a lot of stuff!

UNIVERSITY OF WISCONSIN–MADISON 10 Interactions by exchange of vector bosons New fundamental field present everywhere in universe >> The Higgs boson Other particles attain mass by coupling to this new fundamental field Matter Particles (fermions) Theory: Bai | Balantekin | Barger | Chung | Everett | Halzen | Hashimoto | Shiu Experiment: Black | Bose | Dasu | Herndon | Rebel | Wu From Physics of Sizeless Particles … The Standard Model

UNIVERSITY OF WISCONSIN–MADISON

X-Ray Astrophysics,

Observational Cosmology

X-Ray detection in space – micro-calorimetry

Cosmic Microwave Background studies

Large scale structure studies with sky-surveys

McCammon | Timbie | Bechtol (new)^11 Microcalorimeter to measure X-Rays mK fluctuations in CMB Temperature using 21-cm H-line Large Synoptic Survey Telescope with Gigapixel Camera in construction in Chile

…to the Physics of the entire Cosmos

UNIVERSITY OF WISCONSIN–MADISON Halzen^ September 14, 2010 | Hanson | Karle | Vandenbroucke | Westerhoff … To Deep Antarctic Ice Discoveries (^) UNIVERSITY OF WISCONSIN–MADISON

UNIVERSITY OF WISCONSIN–MADISON More than 100 cosmic neutrinos by now,including events with energies of more than 10^15 eV (really high energy) Discovery of cosmic neutrinos of very high energy For science and the experimental accomplishment of building IceCube Univ. Wisconsin is the lead institution, for construction and operation, with four physics faculty contributing Halzen | Hanson | Karle | Vandenbroucke … To Deep Antarctic Ice Discoveries

Discovery of cosmic ray sources

using emerging field of

multi-messenger astronomy!

UNIVERSITY OF WISCONSIN–MADISON

Atomic, Molecular & Optical Physics

• Manipulation of quantum

systems at the level of

individual atoms.

• Advances in the control

capability of quantum physics

in small systems opens

fundamental new insights.

• Future development from

quantum information to

quantum computing within

reach.

• Madison is at the forefront of

this development.

16 49 laser cooled atoms are lined up, waiting to be manipulated further in Saffman’s lab. Saffman | Walker | Yavuz | Lawler | Kolkowitz (new)

Enabling next gen quantum technologies

UNIVERSITY OF WISCONSIN–MADISON

The Hybrid Quantum Dot Qubit:

How three electrons can be better than one or two

17

Any bit — classical or quantum —

can be a zero or one, up or down.

Only a quantum bit can be

both at the same time.

A single electron spin is the simplest qubit.

It can be manipulated using the same

techniques as MRI imaging, but this method

is slow: the spin must be rotated.

Professor Coppersmith and collaborators

proposed that three electrons could offer

much greater speed:

Shi et al., Phys. Rev. Lett. 108 , 140503 (2012).

Exchanging electrons is intrinsically fast.

Spin up Spin down

or

Brar (new)| Eriksson | McDermott | Rzchowski | Coppersmith | Levchenko | Joynt | Vavilov | Ioffe (new)

Enabling next gen quantum technologies

Yet, tiny by UW-Madison Scale UNIVERSITY OF WISCONSIN–MADISON

9/8/18 University of Wisconsin–Madison 19 Sifting and Winnowing since 1849

• Research and teaching in all disciplines (but dentistry) - 44000 students - Top 10 in Federal research funding for decades
• A land grant college While general UG population is diverse, physics population is far from it.

UNIVERSITY OF WISCONSIN–MADISON 9/8/18 University of Wisconsin–Madison 20

Strategic Plan

Get back to top 15 and improve

• Better organization of work, diligent committees , improve efficiency with automation
• Hire more faculty and staff
  • Retain top talent
  • Replenish successful groups when retirements are foreseen
  • Invest in well-supported and intellectually promising research areas
  • Possibly also in areas relevant for the society (& industry) at large