Phase phenomena in probabilistic theories - Revision history

Mahnsoo.Choi: Changed protection level for "Phase phenomena in probabilistic theories" ([Edit=⧼protect-level-board⧽] (indefinite) [Move=⧼protect-level-board⧽] (indefinite))

2017-03-13T02:08:28Z

Changed protection level for "Phase phenomena in probabilistic theories" ([Edit=⧼protect-level-board⧽] (indefinite) [Move=⧼protect-level-board⧽] (indefinite))

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Mahnsoo.Choi at 02:08, 13 March 2017

2017-03-13T02:08:08Z

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	[[Category:Colloquiums]]		[[Category:Colloquiums]]
	[[Category:Seminars]]		[[Category:Seminars]]
	* Speaker: [[Dahlsten, Oscar]] (University of Oxford)		* Speaker: Prof. [[Dahlsten, Oscar]] (University of Oxford)
	* Date: November 18, 2014		* Date: November 18, 2014
	* Place: Science Building 433		* Place: Science Building 433

Mahnsoo.Choi at 02:07, 13 March 2017

2017-03-13T02:07:28Z

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			[[file:Dahlsten-O1.jpg\|thumb\|x300px\|Prof. Oscar Dahlsten (University of Oxford, UK)]]
	[[Category:Colloquiums]]		[[Category:Colloquiums]]
	[[Category:Seminars]]		[[Category:Seminars]]

Mahnsoo.Choi at 06:02, 7 March 2017

2017-03-07T06:02:57Z

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			[[Category:Colloquiums]]
	[[Category:Seminars]]		[[Category:Seminars]]
	* Speaker: [[Dahlsten, Oscar]] (University of Oxford)		* Speaker: [[Dahlsten, Oscar]] (University of Oxford)

Mahnsoo.Choi at 22:37, 10 October 2015

2015-10-10T22:37:51Z

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	* Date: November 18, 2014		* Date: November 18, 2014
	* Place: Science Building 433		* Place: Science Building 433
	* Abstract: Phase plays a crucial role in many quantum effects including interference. We study phase in probabilistic theories more generally, in order to gain a deeper understanding of phase in quantum theory as well as to consider what could happen in post-quantum scenarios. Phase is normally defined in terms of complex numbers that appear when representing quantum states as complex vectors. Here we give an operational definition whereby phase is instead defined in terms of measurement statistics. The definition makes it possible to ask whether other (convex) probabilistic theories can also have phase and associated phenomena. We use it to explore hypothetical post-quantum particles going through interferometers and find that theories need something like the quantum uncertainty relation between position and unbiased measurements in order to have non-trivial interference, or else they would violate a type of Einstein locality which we dub ‘Branch Locality’. We moreover explore the phase that arises from exchanging particles in scenarios where particles are guaranteed to be indistinguishable but not necessarily quantum. We begin to investigate what new types of particles could exist in such scenarios.

			Phase plays a crucial role in many quantum effects including interference. We study phase in probabilistic theories more generally, in order to gain a deeper understanding of phase in quantum theory as well as to consider what could happen in post-quantum scenarios. Phase is normally defined in terms of complex numbers that appear when representing quantum states as complex vectors. Here we give an operational definition whereby phase is instead defined in terms of measurement statistics. The definition makes it possible to ask whether other (convex) probabilistic theories can also have phase and associated phenomena. We use it to explore hypothetical post-quantum particles going through interferometers and find that theories need something like the quantum uncertainty relation between position and unbiased measurements in order to have non-trivial interference, or else they would violate a type of Einstein locality which we dub ‘Branch Locality’. We moreover explore the phase that arises from exchanging particles in scenarios where particles are guaranteed to be indistinguishable but not necessarily quantum. We begin to investigate what new types of particles could exist in such scenarios.
	* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529		* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529
	* Joint work with Garner, Murao, Nakata and Vedral.		* Joint work with Garner, Murao, Nakata and Vedral.

Mahnsoo.Choi: Protected "Phase phenomena in probabilistic theories" ([Edit=] (indefinite) [Move=] (indefinite))

2015-10-09T07:59:36Z

Protected "Phase phenomena in probabilistic theories" ([Edit=<protect-level-committee>] (indefinite) [Move=<protect-level-committee>] (indefinite))

← Older revision	Revision as of 07:59, 9 October 2015
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Mahnsoo.Choi at 07:49, 9 October 2015

2015-10-09T07:49:32Z

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	* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529		* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529
	* Joint work with Garner, Murao, Nakata and Vedral.		* Joint work with Garner, Murao, Nakata and Vedral.


	{{Media/Button\|Dahlsten14z.pdf\|Download the slides}}		{{Media/Button\|Dahlsten14z.pdf\|Download the slides}}

Mahnsoo.Choi at 07:48, 9 October 2015

2015-10-09T07:48:44Z

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	* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529		* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529
	* Joint work with Garner, Murao, Nakata and Vedral.		* Joint work with Garner, Murao, Nakata and Vedral.

			{{Media/Button\|Dahlsten14z.pdf\|Download the slides}}

Mahnsoo.Choi: Created page with "Category:Seminars * Speaker: Dahlsten, Oscar (University of Oxford) * Date: November 18, 2014 * Place: Science Building 433 * Abstract: Phase plays a crucial role in m..."

2015-10-09T07:45:52Z

Created page with "Category:Seminars * Speaker: Dahlsten, Oscar (University of Oxford) * Date: November 18, 2014 * Place: Science Building 433 * Abstract: Phase plays a crucial role in m..."

New page

[[Category:Seminars]]
* Speaker: [[Dahlsten, Oscar]] (University of Oxford)
* Date: November 18, 2014
* Place: Science Building 433
* Abstract: Phase plays a crucial role in many quantum effects including interference. We study phase in probabilistic theories more generally, in order to gain a deeper understanding of phase in quantum theory as well as to consider what could happen in post-quantum scenarios. Phase is normally defined in terms of complex numbers that appear when representing quantum states as complex vectors. Here we give an operational definition whereby phase is instead defined in terms of measurement statistics. The definition makes it possible to ask whether other (convex) probabilistic theories can also have phase and associated phenomena. We use it to explore hypothetical post-quantum particles going through interferometers and find that theories need something like the quantum uncertainty relation between position and unbiased measurements in order to have non-trivial interference, or else they would violate a type of Einstein locality which we dub ‘Branch Locality’. We moreover explore the phase that arises from exchanging particles in scenarios where particles are guaranteed to be indistinguishable but not necessarily quantum. We begin to investigate what new types of particles could exist in such scenarios.
* Based on: arXiv:1206.5702 (NJP), arXiv:1304.5977 (NCOMMS), arXiv:1307.2529
* Joint work with Garner, Murao, Nakata and Vedral.