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Seth Lloyd

From Wikipedia

Template:Short description Template:Use American English Template:Infobox scientist Seth Lloyd (born August 2, 1960) is an American quantum information scientist and professor in the Massachusetts Institute of Technology Department of Mechanical Engineering.

He is known for work in quantum information science, including work on designs for a quantum computer, quantum analog computation, quantum analogs of Shannon's theorem, and methods for quantum error correction and noise reduction.[1]

Biography

Lloyd was born on August 2, 1960. Lloyd's mother was Susan Lloyd, a history teacher at Phillips Andover.[2][3] His maternal grandparents were Rustin McIntosh, a pediatrician, and Millicent Carey McIntosh, an educational administrator.[2] His father, Robert Lloyd, was an art teacher at Phillips Andover.[2][4] His paternal grandparents were teachers of history and dance at Phillips Exeter.[4]

Lloyd graduated from Phillips Academy in 1978 and received a BA from Harvard College in 1982. He completed Part III and an MPhil from Cambridge University in 1983 and 1984 while on a Marshall Scholarship.[5] Lloyd completed a PhD in physics at Rockefeller University in 1988 advised by Heinz Pagels.

From 1988 to 1991, Lloyd was a postdoctoral researcher at Caltech working with Murray Gell-Mann on applications of information to quantum systems, and from 1991 to 1994 he was a postdoctoral researcher at Los Alamos National Laboratory working on quantum computation. In 1994 he joined the mechanical engineering department at MIT. Lloyd has also been an external faculty member at the Santa Fe Institute.

In 2007 he was named a Fellow of the American Physical Society.[6] In 2012 he was given the International Quantum Communication Award.[7]

Work

Lloyd directs the Center for Extreme Quantum Information Theory (xQIT) at MIT.[8] He has made several contributions to quantum information science, including a proposal for a digital quantum simulator,[9] a framework for quantum metrology,[10] a treatment of continuous-variable quantum information,[11] dynamical decoupling as a method of quantum error mitigation,[12] and research on the possible relevance of quantum effects in biological phenomena, such as photosynthesis.[13][14]

With Aram Harrow and Avinatan Hassidim he introduced the HHL algorithm[15] for solving systems of linear equations, and later several quantum machine learning algorithms based on it.[16][17] These algorithms were widely thought to give an exponential speedup relative to the best classical algorithms, until the discovery by Ewin Tang of classical algorithms achieving the same exponential speedup.[18]

In his 2006 book, Programming the Universe, Lloyd contends that the universe itself is a large quantum computer. According to Lloyd, once the laws of physics are understood completely, small-scale quantum computing can be used to understand the universe completely as well. He states that the whole universe could be simulated on a computer in 600 years provided that computational power increases according to Moore's Law.[19]

Association with Jeffrey Epstein

Lloyd was introduced to Jeffrey Epstein by his literary agent John Brockman at the Edge Billionaires' Dinner in 2004.[20] Lloyd appears in a photo taken at a dinner hosted by Epstein at Harvard in 2004, together with several other Harvard and MIT faculty.[21] Photos of Lloyd, and other professors, appeared in blogs maintained by Epstein and his foundation.[22][23]Template:Failed verification Lloyd acknowledged funding from Epstein in 19 papers,[24] visited Epstein in prison after his conviction,[25] and visited Epstein's private island for a scientific conference.[26] The Epstein files, released in 2025 and 2026, seemingly included several hundred emails from Lloyd or about Lloyd.[27][28]

Public controversy began in July 2019, when reports surfaced that MIT and other institutions had accepted funding from Epstein.[29] Lloyd's connections to Epstein drew strong criticism at MIT. In August 2019, Lloyd published a letter apologizing for accepting grants totaling $225,000 from Epstein.[25] The controversy at MIT continued despite this, including student protests demanding Lloyd's resignation and criticizing MIT's decision to allow him to continue teaching.[26][30][31][32][33][34][35]

The MIT Corporation hired a law firm to prepare a report on MIT's many interactions with Epstein, which was released in January 2020.[36] Concerning Lloyd, the report stated that Epstein had made two donations of $50,000 to Lloyd that were meant to test whether MIT would still accept his donations despite his criminal conviction.[37]Template:Rp The report further stated that Lloyd took deliberate steps "to obscure the fact that Epstein was the donor and to hinder any possible due diligence or vetting by MIT."[37]Template:Rp Lloyd denied that he had misled MIT.[38][39]

After the release of the report, MIT appointed a committee of five senior MIT faculty to assess whether Lloyd had violated any MIT policy.[40] In December 2020, the committee reported that Lloyd did not attempt to circumvent the MIT vetting process, and Lloyd was allowed to keep his tenured faculty position.[41] However, a majority of the committee members concluded that Lloyd had violated MIT policy by not disclosing "crucial information about Epstein’s background."[40] A separate evaluation panel set a series of disciplinary actions over the next 5 years, including limits on Lloyd's ability to solicit donors and to advise students.[40][41] Some students saw the administration's response as too lenient.[42]

Selected publications

Notes

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