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A quantum memory has memory cells, each of the memory cells includes three-stage quantum dots stacked in sequence. A memory cell array is constructed by two-dimensionally arranging the memory cells. The quantum dots are made of heterojunctions of compound semiconductors. Writing and reading to and f

A quantum memory has memory cells, each of the memory cells includes three-stage quantum dots stacked in sequence. A memory cell array is constructed by two-dimensionally arranging the memory cells. The quantum dots are made of heterojunctions of compound semiconductors. Writing and reading to and from a memory cell are executed by bringing a needle electrode close to the memory cell to apply an external electric field while irradiating laser light to an area including the memory cell.

대표청구항 ▼

A quantum memory, comprising: a plurality of memory cells; each of said memory cells comprising a first quantum box, a second quantum box and a third quantum box which are stacked in sequence; and said first quantum box and said second quantum box being coupled by a coupling strength different from

A quantum memory, comprising: a plurality of memory cells; each of said memory cells comprising a first quantum box, a second quantum box and a third quantum box which are stacked in sequence; and said first quantum box and said second quantum box being coupled by a coupling strength different from a coupling strength between said second quantum box and said third quantum box, and further satisfying the relationship: E0(j-1)0(j-2) E0(j-3)0(j-2) (E1(j-1)-E0(j-1))>(E1(j-2)-E0(j-2)) (E1(j-3)-E0(j-3))>(E1(j-2)-E0(j-2)) (E0(j-1)-H0(j-1))≠(E0(j-2)-H0(j-2)) (E0(j-3)-H0(j-3))≠(E0(j-2)-H0(j-2)) where E0(j-1), E0(j-2) and E0(j-3) are ground-state energy levels of electrons in said first quantum box, said second quantum box and said third quantum box, respectively; E1(j-1), E1(j-2) and E1(j-3) are first excited-state energy levels of electrons of said first quantum box, said second quantum box and said third quantum box, respectively; and H0(j-1), H0(j-2) and H0(j-3) are ground-state energy levels of holes in said first quantum box, said second quantum box and said third quantum box, respectively.