Ordered phases of atoms adsorbed in nanotube arrays

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Abstract
The low temperature properties of matter confined in an array of narrow one-dimensional channels are discussed. Weak interchannel interactions can stabilize a crystalline phase. The melting transition is expected to be continuous for both two- and three-dimensional arrays. Possible experimental realizations are suggested. Crystals of noble gas series elements confined inside 1 nm wide nanotube arrays are expected to be stable at temperatures up to 1 K.