TETRAHEDRAL GEOMETRY/TOPOLOGY SEMINAR

  FIRST ANNOUNCEMENT

DATE:               Friday, September 15, 2006                      

LOCATION:     Hempfield High School, Room 213 (directions attached)                

                           followed by dinner at a place to be determined.

4:30 TALK:       Scott Walck, Lebanon Valley College

                           “Classifying Quantum Entanglement using the Local Unitary Group Action”

                           Abstract: Non-relativistic quantum mechanics asserts the existence of

              entangled quantum states, that is multi-particle states for which

              individual particles cannot be given well-defined states.  Such

              entangled states are ubiquitous; they form a dense subset of the

              space of composite quantum states.  An important problem is to

              understand which types of entanglement are the same and which are

              different.  We address this problem for systems of n quantum bits

              (qubits) by studying the action of the local unitary group SU(2)^n

              on the space of quantum states CP^(2^n-1).  This talk will give some

              physical background to motivate the problem, then discuss the orbits

              and orbit space for two and three qubits.  A general result for n

              qubits will also be mentioned.

     EVERYONE WELCOME

       PLEASE FORWARD THIS ANNOUNCEMENT TO ANYONE INTERESTED

           The Tetrahedral Geometry/Topology Seminar is sponsored jointly by

Elizabethtown College, Franklin & Marshall College, Lebanon Valley College and Millersville University.