Patents by Inventor Sankar Das Sarma
Sankar Das Sarma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10346761Abstract: Example methods and mechanisms are described herein for implementing and adiabatically operating a topological quantum computing (TQC) phase gate that complements the existing Clifford operations, and thereby allows universal quantum computation with Majorana systems. Further embodiments include a testing system for the phase gate that is feasible with Majorana zero modes and demonstrates violations of the CHSH-Bell inequality. Further, the design used for the testing of the inequality leads directly to a practical platform for performing universal TQC with Majorana wires in which explicit braiding need never occur.Type: GrantFiled: October 26, 2018Date of Patent: July 9, 2019Assignee: Microsoft Technology Licensing, LLCInventors: David Clarke, Jay Deep Sau, Sankar Das Sarma
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Publication number: 20190065982Abstract: Example methods and mechanisms are described herein for implementing and adiabatically operating a topological quantum computing (TQC) phase gate that complements the existing Clifford operations, and thereby allows universal quantum computation with Majorana systems. Further embodiments include a testing system for the phase gate that is feasible with Majorana zero modes and demonstrates violations of the CHSH-Bell inequality. Further, the design used for the testing of the inequality leads directly to a practical platform for performing universal TQC with Majorana wires in which explicit braiding need never occur.Type: ApplicationFiled: October 26, 2018Publication date: February 28, 2019Applicant: Microsoft Technology Licensing, LLCInventors: David Clarke, Jay Deep Sau, Sankar Das Sarma
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Patent number: 10133984Abstract: Example methods and mechanisms are described herein for implementing and adiabatically operating a topological quantum computing (TQC) phase gate that complements the existing Clifford operations, and thereby allows universal quantum computation with Majorana systems. Further embodiments include a testing system for the phase gate that is feasible with Majorana zero modes and demonstrates violations of the CHSH-Bell inequality. Further, the design used for the testing of the inequality leads directly to a practical platforms for performing universal TQC with Majorana wires in which explicit braiding need never occur.Type: GrantFiled: June 30, 2016Date of Patent: November 20, 2018Assignee: Microsoft Technology Licensing, LLCInventors: David Clarke, Jay Deep Sau, Sankar Das Sarma
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Publication number: 20170091649Abstract: Example methods and mechanisms are described herein for implementing and adiabatically operating a topological quantum computing (TQC) phase gate that complements the existing Clifford operations, and thereby allows universal quantum computation with Majorana systems. Further embodiments include a testing system for the phase gate that is feasible with Majorana zero modes and demonstrates violations of the CHSH-Bell inequality. Further, the design used for the testing of the inequality leads directly to a practical platforms for performing universal TQC with Majorana wires in which explicit braiding need never occur.Type: ApplicationFiled: June 30, 2016Publication date: March 30, 2017Applicant: Microsoft Technology Licensing, LLCInventors: David Clarke, Jay Deep Sau, Sankar Das Sarma
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Patent number: 8620835Abstract: Disclosed herein is a protocol that enables the ?/8-gate in chiral topological superconductors in which superconducting stiffness ? has been suppressed. The protocol enables a topologically protected ?/8-gate in any pure Ising system that can be fabricated into genus=1 surface. By adding the ?/8-gate to previously known techniques, a design for universal topologically protected quantum computation which may be implemented using rather conventional materials may be obtained.Type: GrantFiled: December 28, 2010Date of Patent: December 31, 2013Assignee: Microsoft CorporationInventors: Michael Freedman, Parsa Bonderson, Chetan Nayak, Sankar Das Sarma
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Patent number: 8583903Abstract: Disclosed herein are efficient geometries for dynamical topology changing (DTC), together with protocols to incorporate DTC into quantum computation. Given an Ising system, twisted depletion to implement a logical gate T, anyonic state teleportation into and out of the topology altering structure, and certain geometries of the (1,?2)-bands, a classical computer can be enabled to implement a quantum algorithm.Type: GrantFiled: December 28, 2010Date of Patent: November 12, 2013Assignee: Microsoft CorporationInventors: Michael Freedman, Parsa Bonderson, Chetan Nayak, Sankar Das Sarma
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Publication number: 20110161638Abstract: Disclosed herein are efficient geometries for dynamical topology changing (DTC), together with protocols to incorporate DTC into quantum computation. Given an Ising system, twisted depletion to implement a logical gate T, anyonic state teleportation into and out of the topology altering structure, and certain geometries of the (1,?2)-bands, a classical computer can be enabled to implement a quantum algorithm.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: Microsoft CorporationInventors: Michael Freedman, Parsa Bonderson, Chetan Nayak, Sankar Das Sarma
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Publication number: 20110156008Abstract: Disclosed herein is a protocol that enables the ?/8-gate in chiral topological superconductors in which superconducting stiffness ? has been suppressed. The protocol enables a topologically protected ?/8-gate in any pure Ising system that can be fabricated into genus=1 surface. By adding the ?/8-gate to previously known techniques, a design for universal topologically protected quantum computation which may be implemented using rather conventional materials may be obtained.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: Microsoft CorporationInventors: Michael Freedman, Parsa Bonderson, Chetan Nayak, Sankar Das Sarma
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Patent number: 7598514Abstract: A quantum computer can only function stably if it can execute gates with extreme accuracy. “Topological protection” is a road to such accuracies. Quasi-particle interferometry is a tool for constructing topologically protected gates. Assuming the corrections of the Moore-Read Model for ?=5/2's FQHE (Nucl. Phys. B 360, 362 (1991)) we show how to manipulate the collective state of two e/4-charge anti-dots in order to switch said collective state from one carrying trivial SU(2) charge, |1>, to one carrying a fermionic SU(2) charge |?>. This is a NOT gate on the {|1>, |?>} qubit and is effected by braiding of an electrically charged quasi particle ? which carries an additional SU(2)-charge. Read-out is accomplished by ?-particle interferometry.Type: GrantFiled: May 28, 2008Date of Patent: October 6, 2009Assignee: Microsoft CorporationInventors: Michael H. Freedman, Chetan V. Nayak, Sankar Das Sarma
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Publication number: 20080224726Abstract: A quantum computer can only function stably if it can execute gates with extreme accuracy. “Topological protection” is a road to such accuracies. Quasi-particle interferometry is a tool for constructing topologically protected gates. Assuming the corrections of the Moore-Read Model for ?=5/2's FQHE (Nucl. Phys. B 360, 362 (1991)) we show how to manipulate the collective state of two e/4-charge anti-dots in order to switch said collective state from one carrying trivial SU(2) charge, |1>, to one carrying a fermionic SU(2) charge |?>. This is a NOT gate on the {|1>, |?>} qubit and is effected by braiding of an electrically charged quasi particle ? which carries an additional SU(2)-charge. Read-out is accomplished by ?-particle interferometry.Type: ApplicationFiled: May 28, 2008Publication date: September 18, 2008Applicant: Microsoft CorporationInventors: Michael H. Freedman, Chetan V. Nayak, Sankar Das Sarma
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Patent number: 7394092Abstract: A quantum computer can only function stably if it can execute gates with extreme accuracy. “Topological protection” is a road to such accuracies. Quasi-particle interferometry is a tool for constructing topologically protected gates. Assuming the corrections of the Moore-Read Model for ?=5/2's FQHE (Nucl. Phys. B 360, 362 (1991)) we show how to manipulate the collective state of two e/4-charge anti-dots in order to switch said collective state from one carrying trivial SU(2) charge, |1>, to one carrying a fermionic SU(2) charge |?>. This is a NOT gate on the {|1>, |?>} qubit and is effected by braiding of an electrically charged quasi particle a which carries an additional SU(2)-charge. Read-out is accomplished by ?-particle interferometry.Type: GrantFiled: October 6, 2006Date of Patent: July 1, 2008Assignee: Microsoft CorporationInventors: Michael H. Freedman, Chetan V. Navak, Sankar Das Sarma