Semiconductor system with transitional metal impurity for quantum information processing
AssigneeThe University of Chicago
InventorsDavid Awschalom, Berk Diler, William Koehl, Samuel James Whiteley
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Abstract
Methods and devices are disclosed for implementing quantum information processing based on electron spins in semiconductor and transition metal compositions. The transition metal electron orbitals split under semiconductor crystal field. The electron ground states are used as qubits. The transitions between the ground states involve electron spin flip. The semiconductor and transition metal compositions may be further included in optical cavities to facilitate quantum information processing. Quantum logic operations may be performed using single color or two color coherent resonant optical excitations via an excited electron state.
Claims24
A quantum information processing device comprising:
- at least one optical element;
- a semiconductor crystal composition comprising
- a multi-hedral semiconductor crystal host with a multi-hedral coordination geometry;
- and
- non-rare earth transition metal ions having a d-N electron orbital configuration,
- wherein the non-rare earth transition metal ions substitute at a corresponding plurality of crystal sites of the semiconductor crystal host;
- wherein a crystal field of the semiconductor crystal host splits the d-N electron orbitals of the non-rare earth transition metal ions into lower energy orbitals and higher energy orbitals with a crystal field splitting;
- wherein the lower energy orbitals are further split by electron spin pairing energy forming at least two ground states and at least one excited state;
- wherein the crystal field splitting is larger than the spin pairing energy;
- and
- wherein the at least one optical element is configured to interact with the semiconductor crystal composition for quantum information processing using optical excitations resonant with an optical transition involving the ground states and the excited state.
In a quantum information processing device comprising a multi-hedral semiconductor crystal host with a multi-hedral coordination geometry in which each of a plurality of lattice sites of the semiconductor crystal host are substituted with a non-rare earth transition metal ion having d-N electrons, a method for quantum information processing, comprising:
- exciting the non-rare earth transition metal ions with coherent optical fields resonant with at least one optical transition involving at least one electronic ground state and at least one excited state of the non-rare earth transition metal ions;
- wherein the non-rare earth transition metal ions substitute at a corresponding plurality of crystal sites of the semiconductor crystal host;
- wherein a crystal field in the semiconductor crystal host splits orbitals of the d-N electrons of the non-rare earth transition metal ions into lower energy orbitals and higher energy orbitals by a crystal field splitting;
- wherein the lower energy orbitals are further split by electron spin pairing energy forming the at least two ground states and the at least one excited state;
- and
- wherein the crystal field splitting is larger than the spin pairing energy.
Dependencies are inferred from the claim text.