[quantum-info] Two PiQuDos seminars this week, Monday and Wednesday

[Daniel Brod]

Reminder: Quantum information seminar today by Aleksander Kubica, 4pm in
the Time room

On Sun, Dec 11, 2016 at 5:09 PM, Daniel Brod <dbrod at perimeterinstitute.ca>
wrote:

> Dear all
>
> This week we have two quantum information seminars:
>
> *On Monday Dec 12, 4pm in the Time room, we have *
>
> Speaker: Aleksander Kubica
>
> Title: The ABCs of color codes
>
> Abstract: To build a fully functioning quantum computer, it is necessary
> to encode quantum information to protect it from noise. Topological codes,
> such as the color code, naturally protect against local errors and
> represent our best hope for storing quantum information. Moreover, a
> quantum computer must also be capable of processing this information. Since
> the color code has many computationally valuable transversal logical
> gates, it is a promising candidate for a future quantum computer
> architecture.
>
> In the talk, I will provide an overview of the color code. First, I will
> establish a connection between the color code and a well-studied model -
> the toric code. Then, I will explain how one can implement a universal
> gate set with the subsystem and the stabilizer color codes in three
> dimensions using techniques of code switching and gauge fixing. Next, I
> will discuss the problem of decoding the color code. Finally, I will
> explain how one can find the optimal error correction threshold by
> analyzing phase transitions in certain statistical-mechanical models.
>
> The talk is based on http://arxiv.org/abs/1410.0069,
> http://arxiv.org/abs/1503.02065 and recent works with M. Beverland, F.
> Brandao, N. Delfosse, J. Preskill and K. Svore.
>
>
> ***
>
>
>
> *On Wednesday Dec 14, 4pm in the Time room, we have*
> Speaker: Chris Jackson
>
> Title: Non-holonomic tomography and detecting state-preparation and
> measurement correlated errors
>
> Abstract: Quantum tomography is an important tool for characterizing the
> parameters of unknown states, measurements, and gates.  Standard quantum
> tomography is the practice of estimating these parameters with known
> measurements, states, or both, respectively.  In recent years, it has
> become important to address the issue of working with systems where the
> ``devices'' used to prepare states and make measurements *both *have
> significant errors.  Of particular concern to me is whether such
> state-preparation and measurement errors are correlated with each other.
> In this talk, I will share a solution to assessing such correlations with
> an object called a partial determinant.  Further, I will show how this
> technique suggests a perspective for such correlated quantum states and
> observables (over the space of device settings) is analogous to the
> non-holonomic perspectives of thermodynamic heat and work (over the
> macroscopic state space.)
>
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