[QIP-Sem] QIP Seminar at 4pm in 26-214

[Peter Shor]

Speaker: Martin Roetteler (NEC labs)

Title: Quantum convolutional codes

Quantum convolutional codes can be used to protect a stream of quantum 
bits against errors when sending them along a quantum channel. We review 
the code conditions for quantum convolutional codes, give some basic code 
constructions, and motivate the notion of catastrophic errors. We present 
an algorithm to compute a constant depth quantum circuit which can be used 
to perform non-catastrophic encoding and inverse encoding. We also show 
that the encoders and their inverses constructed by our method naturally 
can be applied online, i.e., qubits can be sent and received with constant 
delay.
This is joint work with Markus Grassl (U Karlsruhe); quant-ph/0602129