  The scaled-up qubits proposed are molecules which display large amplitude
motions at very low temperatures and the matrix that traps them. These comprise
ionic solids such as ammonium tetraphenylborate (ATPB) or methane dilute in a
xenon matrix. In this manner, an enormous number qubits are present from
inception. Each kind of qubit has a multiplicity of transitions of interest
which are observed (without the need of external fields, ultra-low temperatures
or ultra-high vacuum conditions) using diverse well established experimental
techniques at frequencies ranging from 10 to 3300 cm-1. Described in detail are
the transitions in ATPB. These include: (i) the IR N-H asymmetric vibration of
the ammonium ion qubit which nearly freely rotate about their C3 axes inside
the tetraphenylborate matrix. This results in a multi-level
vibration-orientation which exhibits multiple bands even at very low
temperatures due to nuclear spin freezing between the first three orientation
levels. Accessible tunneling frequencies between the orientation levels and the
possibility to control inter-qubit distance make this qubit a strong candidate
to generate concurrently large entanglement and stable superposition in diverse
experimental set-ups; and (ii) the Raman allowed normal modes of the
tetraphenylborate anion qubit. These are experimentally resolved from very low
temperatures up to 300 K. Further qubit examples and transitions of interest
are examined. Experimental setups with multi-crystal arrays, both in a given or
several locations, become possible using this approach.
